WorksheetsPlanes and Axes of Motion
Total questions: 150
Worksheet time: 1hrs 15mins
Which plane divides the body into right and left portions and primarily involves flexion and extension movements?
Sagittal plane with flexion and extension
Horizontal plane with rotation movements
Oblique plane with circumduction actions
Frontal plane with abduction and adduction
Which plane divides the body into anterior and posterior portions?
Horizontal plane running superior to inferior
Sagittal plane running front to back
Frontal plane running side to side
Longitudinal plane running top to bottom
Rotation typically occurs within which plane?
Sagittal plane about a frontal axis
Oblique plane about a diagonal axis
Frontal plane about a sagittal axis
Horizontal plane about a vertical axis
Axes of motion are always oriented how relative to their joint planes of motion?
Variable depending on muscle
At a forty-five degree angle
Perpendicular to the plane
Parallel to the plane surface
Which axis is also termed medial-lateral and is associated with flexion and extension?
Transverse axis passing horizontal
Vertical axis passing superior-inferior
Frontal axis passing side to side
Sagittal axis passing anterior-posterior
Abduction and adduction typically occur within which plane and about which axis?
Sagittal plane about frontal axis
Frontal plane about vertical axis
Frontal plane about sagittal axis
Horizontal plane about vertical axis
The three cardinal planes intersect at which anatomical location concept?
Second lumbar vertebra
Midpoint of each limb
Center of mass approximately
Center of gravity precisely
Which statement best describes the mid-sagittal plane?
Divides the body into equal anterior and posterior parts
Divides the body diagonally into unequal sections
Divides the body into equal right and left parts
Divides the body into equal superior and inferior parts
Which axis is sometimes termed a longitudinal axis?
Transverse axis running horizontal
Vertical axis running superior-inferior
Frontal axis running medial-lateral
Sagittal axis running anterior-posterior
Thumb flexion and extension occur within which plane and about which axis?
Sagittal plane about sagittal axis
Frontal plane about frontal axis
Frontal plane about sagittal axis
Horizontal plane about vertical axis
What is the maximum degrees of freedom a single joint can have?
Four degrees across multiple planes
Three degrees across three planes
Two degrees across two planes
One degree across one plane
A uniaxial joint moves within how many planes and about how many axes?
One plane about one axis
Two planes about two axes
Three planes about three axes
One plane about two axes
Active range of motion occurs under which condition?
Gravity alone moves joints without effort
Muscles not contracting, external force moves joint
Muscles contract to move joints through ROM
Joints immobilized by external support
Which movements are classified as osteokinematic?
Elastic deformation of ligaments only
Translation, glide, spin at articular surfaces
Flexion, extension, abduction, adduction, rotation
Neural activation thresholds in motor units
In anatomical position, flexion and extension typically occur within which plane and about which axis?
Frontal plane about sagittal axis
Sagittal plane about frontal axis
Horizontal plane about vertical axis
Oblique plane about diagonal axis
Which term best describes movement that brings two anterior surfaces closer together within the sagittal plane about a frontal axis?
Abduction of a limb segment
Horizontal adduction of a segment
Lateral rotation of a segment
Flexion of a limb segment
During knee flexion, which surfaces move toward each other, representing an exception to the typical flexion definition?
Medial thigh and leg surfaces
Anterior thigh and leg surfaces
Lateral thigh and leg surfaces
Posterior thigh and leg surfaces
Elbow flexion is defined by which movement of the forearm relative to the arm?
Lateral forearm toward lateral arm
Anterior forearm toward anterior arm
Medial forearm toward medial arm
Posterior forearm toward posterior arm
When toes point downward toward the floor, which ankle movement is occurring?
Plantar flexion of the ankle
Dorsiflexion of the ankle
Inversion at the ankle
Eversion at the ankle
Which statement accurately defines extension within the sagittal plane?
Movement occurs only in the frontal plane
Anterior surfaces move away from each other
Movement occurs about a vertical axis
Anterior surfaces move toward each other
Head tipping posteriorly to face toward the ceiling exemplifies which movement from anatomical position?
Extension of the head and neck
Flexion of the head and neck
Lateral rotation of the head
Horizontal abduction of the head
Which term describes movement beyond a joint’s expected nonpathological extension range?
Hyperextension of the joint
Supination of the joint
Hypoflexion of the joint
Circumduction of the joint
Abduction and adduction primarily occur in which plane and about which axis?
Sagittal plane, frontal axis
Transverse plane, longitudinal axis
Horizontal plane, vertical axis
Frontal plane, sagittal axis
What is the reference point for determining finger abduction and adduction?
Middle finger as the reference
Thumb as the reference point
Ring finger as the reference
Index finger as the reference
Which statement about the second toe’s movements is correct?
It abducts medially or laterally only
It adducts toward the hallux only
It flexes and extends only
It circumducts around the midline
Horizontal abduction of the shoulder requires which prerequisite movement?
Initial abduction to 90 degrees
Initial flexion to 90 degrees
Initial extension to neutral
Initial external rotation
Radial deviation of the wrist moves the hand in which direction?
Away from the carpal bones
Toward the ulnar/little finger side
Toward the radial/thumb side
Toward the midline of the forearm
Lateral flexion of the trunk involves bending to the side, moving the shoulder toward which hip?
Posterior pelvic tilt
Ipsilateral hip alignment
Contralateral hip alignment
Anterior pelvic tilt
Rotation of a limb segment occurs in which plane and about which axis?
Sagittal plane, frontal axis
Horizontal plane, vertical axis
Oblique plane, longitudinal axis
Frontal plane, sagittal axis
Medial rotation is also termed which of the following?
Pronation terminology
Supination terminology
External rotation terminology
Internal rotation terminology
Which joints are capable of both medial and lateral rotation in typical human movement?
Shoulder and hip joints
Intervertebral and sacral joints
Elbow and knee joints
Wrist and ankle joints
Which concept defines the number of independent directions a joint can move?
Open-chain concept
Degrees of freedom concept
Active insufficiency concept
Force couple concept
Active range of motion differs from passive range of motion because active ROM is performed by which mechanism?
Joint arthrokinematics only
Gravity-assisted movement
External manual assistance
Voluntary muscle contraction
Which statement best distinguishes supination from pronation of the forearm in anatomical position?
Supination orients the palm anteriorly, pronation posteriorly
Supination turns the palm inferiorly, pronation superiorly
Supination flexes the elbow, pronation extends it
Supination abducts the wrist, pronation adducts it
Medial rotation of the shoulder involves which directional movement relative to the body's midline?
Lateral surface rotates toward the axial skeleton
Posterior surface rotates away from the midline
Anterior surface rotates away from the midline
Anterior surface rotates toward the midline
Circumduction at the shoulder is best described as a cone-shaped pattern requiring what sequential actions?
Flexion, abduction, extension, adduction with rotation
Extension, adduction, supination, pronation with glide
Inversion, eversion, dorsiflexion, plantar flexion cycles
Protraction, retraction, elevation, depression movements
Which pairing correctly matches ankle movement with its classical definition?
Inversion: dorsiflexion only; Eversion: plantar flexion only
Inversion: sole faces laterally; Eversion: sole faces medially
Inversion: adduction of toes; Eversion: abduction of toes
Inversion: sole faces medially; Eversion: sole faces laterally
Clinically, the triplanar movement combination termed supination of the foot most commonly includes which set?
Eversion, abduction, dorsiflexion
Inversion, adduction, plantar flexion
Inversion, abduction, dorsiflexion
Eversion, adduction, plantar flexion
During pronation of the foot, which triplanar combination is typically present?
Inversion, abduction, dorsiflexion
Eversion, adduction, plantar flexion
Inversion, adduction, plantar flexion
Eversion, abduction, dorsiflexion
Opposition at the thumb is characterized by what specific contact pattern?
Thumb pad faces pads of the other fingers
Thumb dorsal surface faces the palm
Thumb nail aligns parallel with index finger nail
Thumb shaft rotates laterally toward the forearm
Which statement best contrasts opposition and reposition of the thumb?
Opposition brings the pad to other pads; reposition returns to anatomical
Opposition is wrist motion; reposition is elbow motion
Opposition returns to anatomical; reposition brings the pad to other pads
Opposition flexes MCP; reposition extends IP only
Which statement best distinguishes statics from dynamics in mechanics?
Statics studies velocity vectors in moving systems
Statics focuses on motion created by forces over time
Statics analyzes accelerating bodies with changing forces
Statics analyzes non-moving systems under forces
In biomechanics, kinematics primarily describes which aspect of movement?
Stabilization produced by muscular contraction
Motion created by forces without causes
Internal torque generated at joint axes
Magnitude and direction of applied forces
Which measure is a scalar quantity?
Acceleration direction toward the ground
Velocity measured in meters per second
Force measured in newtons
Speed measured in miles per hour
Vectors differ from scalars because vectors include what property?
Magnitude and direction together
Only magnitude without direction
Mass independent of motion
Time independent of space
Clinically, documenting both magnitude and direction of a force allows what outcome?
Removal of friction between surfaces
Conversion of vectors to scalars easily
Elimination of gravity during movement
Comparison of treatments over time
Push and pull forces create which respective mechanical effects?
Push causes shear; pull causes rotation
Push causes rotation; pull causes shear
Push causes traction; pull causes compression
Push causes compression; pull causes traction
Which is an internal force in the human body?
Muscular contraction generating joint torque
Gravity acting downward on body mass
Externally applied resistance like a weight
Ground reaction from supporting surface
What is the ground reaction force during standing?
Upward force exerted by the support surface
Downward gravitational weight acting on the body
Resistance between two surfaces called friction
Internal ligament tension stabilizing a joint
Which statement about friction is accurate?
Friction is only present in internal body tissues
Friction accelerates motion along smooth surfaces
Friction equals gravitational force in magnitude
Friction opposes motion between contacting surfaces
Which configuration defines linear forces on an object?
Two or more forces colinear along the same line
Two equal forces parallel but opposite directions
Three noncolinear forces intersecting at a point
A single torque causing rotation about an axis
A patient performs elbow flexion with a 10-pound dumbbell. To fully describe the applied vector, what must be specified?
Time and space factors without magnitude
Only the joint angle in degrees is required
Only the magnitude of 10 pounds is required
Magnitude of 10 pounds and direction of application
Which domain does biomechanics most directly apply to?
Genetic determinants of musculoskeletal traits
Electromagnetic fields around bones
Chemical reactions within muscle fibers
Principles of mechanics to human movement
Which statement best defines torque in human movement?
Tendency of a force to produce rotation
Amount of linear force along a segment
Rate of change of position over time
Opposing compression causing concavity
Velocity includes which two components?
Magnitude and direction of motion
Force and moment arm length
Acceleration and mass of object
Compression and traction forces
Speed differs from velocity because speed is
A scalar without direction
A vector with direction
Measured only in ft/s2
Dependent on torque length
Acceleration is best described as
Rate of change of velocity
Rate of change of position
Magnitude of rotary force
Difference between compression and traction
Which formula expresses the relationship among force, mass, and acceleration?
F = m a
T = F × MA
v = d / t
COG above BOS
Moment arm is defined as the
Perpendicular distance from force to axis
Angle between muscle and bone
Magnitude of applied compressive force
Length of the lever segment used
Torque increases when
Line of pull approaches 0 degrees
Mass decreases while velocity rises
Speed of motion increases
Force or moment arm increases
When force is applied perpendicular to a limb segment, the result is
Torque decreases with longer moment arm
No torque and pure traction only
All applied force becomes compression
All applied force generates torque
If resistance is applied at the ankle during knee extension, compared with mid‑leg application, the patient must
Generate less muscle force
Maintain identical muscle force
Eliminate all compressive forces
Generate more muscle force
As the line of pull of the biceps approaches 90 degrees, the muscle
Decreases efficiency across ROM
Has minimal torque production
Generates greatest compression force
Generates greatest rotary force
When the line of pull is less than 90 degrees, what happens to forces at the joint?
Torque doubles for same applied force
Compression decreases, rotation increases
Traction increases, rotation increases
Compression increases, rotation decreases
Which change will decrease torque if moment arm stays constant?
Decrease applied force magnitude
Apply force more perpendicular
Increase applied force magnitude
Increase moment arm length
Torsional forces are best characterized as
Direct traction on concave surfaces
Linear translation along long axis
Single compressive load on convex side
Two opposing forces causing twisting
Bending loads produce which paired effects on an elongated object?
Uniform traction across both sides
Compression on concave, traction on convex
Compression on convex, traction on concave
Uniform compression across both sides
Which statement about speed and velocity is correct?
Speed lacks direction; velocity has direction
Both are vectors with direction
Speed is ft/s2; velocity is ft/s
Velocity is mass per unit distance
Select the most efficient joint angle for rotary motion by a muscle.
Near 90 degrees at the joint
Near full extension of the joint
Near starting angle of ROM
Near end angle of the ROM
A clinician wants to double torque without changing force. What adjustment achieves this?
Shift resistance closer to axis
Reduce line of pull angle
Halve the moment arm length
Double the moment arm length
Which scenario most increases traction forces at a joint?
Moment arm shortened by half
Force applied purely perpendicular
Line of pull exactly at 90 degrees
Line of pull greater than 90 degrees
Which statement best defines a force arm (FA) in lever systems?
Distance from resistance to axis of rotation
Distance from applied force to axis of rotation
Distance from axis to center of gravity
Distance between two loads on a lever
In human anatomy, what typically determines the resistance arm (RA) for a limb segment?
Distance from muscle origin to insertion
Combined center of mass of segments and any load
Length of the bone only
Joint range of motion at the axis
Which configuration describes a first-class lever?
Force between axis and resistance
Axis between force and resistance
Resistance between axis and force
Axis and force on same side of resistance
For a first-class lever, moving the axis closer to the resistance has which effect?
No change in mechanical advantage
Equal FA and RA lengths
Longer FA and shorter RA
Shorter FA and longer RA
A worker balances two bundles on a shoulder yoke. When one heavier bundle is moved closer to the axis, what occurs?
Lighter bundle gains shorter lever arm
Both bundles have equal lever arms
Heavier bundle gains longer lever arm
Heavier bundle gains shorter lever arm
Which anatomical example represents a first-class lever around the cervical spine?
Skull articulating on first cervical vertebra
Ankle plantarflexion during heel raise
Elbow flexing with biceps
Knee extending with quadriceps
When the head extends posteriorly about the atlanto-occipital joint, which configuration applies?
Force and load both anterior to axis
Axis posterior to load and force
Load anterior to axis, force posterior
Force anterior to axis, load posterior
Which configuration describes a second-class lever?
Axis between force and resistance
Resistance between axis and force
Force between axis and resistance
Axis and resistance on same side of force
Mechanical advantage in a second-class lever is maximized when which condition is met?
RA longer than FA
FA longer than RA
FA equal to RA
FA shorter than RA
In a wheelbarrow modeled as a second-class lever, what happens when the load is moved closer to the wheel (axis)?
Required force increases due to longer RA
Required force decreases due to shorter RA
Required force unchanged due to equal arms
Required force increases due to longer FA
Which statement about work (W = F × distance) for any lever is accurate?
Work increases when axis is moved
Work is constant for a given load and displacement
Work equals mechanical advantage times distance
Work decreases with longer force arm
If a 6-foot lever has FA and RA both 3 ft lifting 50 lb, how many foot-pounds is the resistance moment?
200 foot-pounds
150 foot-pounds
75 foot-pounds
100 foot-pounds
On the same lever, if FA becomes 4 ft and RA 2 ft, what force lifts the 50 lb load?
25 pounds of force
75 pounds of force
100 pounds of force
50 pounds of force
Which change to a second-class lever decreases the required lifting force?
Move resistance farther from axis
Shorten the force arm length
Lengthen the force arm relative to RA
Place force nearer the axis than resistance
When analyzing anatomical levers, why can RA be difficult to measure precisely?
Muscle forces are always constant
Mass distribution varies across limb segments
Axes of motion are fixed in all joints
Center of mass is identical across subjects
Which statement best describes the force–distance tradeoff common to simple machines like pulleys and inclined planes?
Force and distance change independently of each other
More force requires longer movement distance
Less force requires longer movement distance
Less force requires shorter movement distance
A fixed pulley primarily provides which mechanical advantage in movement tasks?
Changes force direction without multiplying force
Multiplies force with no distance change
Decreases load friction by surface smoothing
Stores elastic energy for later release
Compared with a fixed pulley, a movable pulley in a block-and-tackle system typically does what?
Eliminates rope tension and slack entirely
Reduces required force by sharing the load
Increases required force by adding resistance
Keeps force the same while changing angle
In an anatomical pulley at the knee, what role does the patella most directly serve during extension?
Reduces joint compression through suction
Shortens the muscle fiber resting length
Stores calcium to strengthen the tendon
Deflects tendon to improve moment arm
Why do movable pulleys require pulling more rope length to lift a load the same height?
Mechanical advantage trades distance for force
Energy is lost to rope heat dissipation
Friction forces double with each pulley
Rope elasticity increases displacement error
Which scenario best exemplifies an inclined plane improving accessibility in rehabilitation settings?
A hanging bar for traction therapy
A vertical ladder for ROM practice
A step-down platform for plyometrics
A ramp allowing wheelchair ascent
For a ramp replacing stairs, which variable most directly lowers the effort required to rise?
Greater coefficient of rolling friction
Larger vertical rise for the same run
Shorter horizontal run of the ramp
Smaller slope angle of the ramp
Which quantity increases when a ramp is made longer to maintain the same vertical rise?
Work done against gravity
Required input force
Distance traveled along the ramp
Mechanical load on the joints
In kinesiology terms, an anatomical pulley increases torque by primarily affecting which parameter?
Length–tension resting angle
Joint reaction force magnitude
Moment arm of the tendon
Muscle cross-sectional area
A therapist selects a two-sheave movable pulley for patient-assisted lifting. What immediate outcome should be expected for the patient’s applied force?
Force doubles while rope travel halves
Force decreases with no distance change
Force halves while rope travel doubles
Force stays constant regardless of sheaves
Which misconception about fixed pulleys should be corrected when teaching patients?
They eliminate friction in the system
They only change the direction of force
They always reduce the required effort
They increase muscle fiber recruitment
A climber uses a haul system with one fixed and one movable pulley. Which statement is most accurate about mechanical advantage?
Advantage is independent of pulley arrangement
Advantage depends on rope segments supporting load
Advantage increases only with larger pulley diameters
Total advantage equals the number of pulleys
Designing a rehab ramp for limited leg strength, which combination best minimizes required push force while keeping rise constant?
Short ramp, high slope angle
Variable ramp, fluctuating slope angle
Long ramp, low slope angle
Medium ramp, medium slope angle
When a tendon wraps around a bony prominence forming an anatomical pulley, the primary functional change is what?
Converted rotational motion to translation
Reduced tendon tension by slackening
Redirected line of pull with larger lever arm
Shortened bone length to decrease torque
A patient reports pulling twice the rope length when using a pulley aid compared to lifting directly. What likely system is being used?
Single fixed pulley with no advantage
Capstan winch with friction braking
Counterweight system with equal masses
Movable pulley providing 2:1 advantage
A fixed pulley in the human body changes the direction of force but provides no mechanical advantage. Which statement best explains why?
Force arm equals resistance arm in fixed pulleys
Force arm is longer than resistance arm in fixed pulleys
Resistance arm is longer than force arm in fixed pulleys
Cable tension increases across fixed pulleys
Which structure acts like a pulley to redirect the fibularis longus tendon?
Acromion of the scapula
Greater trochanter of femur
Medial epicondyle of humerus
Lateral malleolus of the ankle
In a single moveable pulley, a 50‑lb load is supported by two cable segments. What input force at the free end lifts the load at constant velocity?
25 pounds of force
50 pounds of force
12.5 pounds of force
75 pounds of force
What primary benefit is gained by adding more moveable pulleys to a system?
Shorter cable length requirement
Greater change in direction only
Reduced friction at the axis
Increased mechanical advantage for force
Why are moveable pulley systems not found in the human body?
Bones cannot act as axles
They require cables on both sides of the pulley
Muscles lack tendinous attachment
They cannot change force direction
A longer wheelchair ramp to a fixed rise requires less force but more distance. Which simple machine principle explains this?
Inclined plane trades force for distance
Lever trades torque for speed
Wheel and axle trades radius for velocity
Pulley trades tension for direction
Federal guidelines state that an accessible ramp should not exceed a rise of 1 inch per 12 inches of run. What slope angle is approximately described?
About twenty-five degrees slope
About fifteen degrees slope
About two degrees slope
About eight degrees slope
Which statement correctly compares a longer, gentler ramp to a shorter, steeper ramp of the same rise?
Longer ramp needs same force, same distance
Longer ramp needs more force, less distance
Longer ramp needs more power, less time
Longer ramp needs less force, more distance
Carrying a heavy object across the shoulders primarily creates what lower‑extremity joint effect?
Increased compression through the joints
Increased traction through the joints
Increased shear across the joints
Decreased compression through the joints
When carrying a heavy object in the right hand, which force combination is imposed?
Arm and trunk compression
Arm and trunk traction
Right arm traction and right trunk compression
Right arm compression and right trunk traction
To push a large, heavy box across the floor most effectively, how should a person orient their push relative to the desired line of motion?
Downward relative to the line of motion
Upward relative to the line of motion
Perpendicular to the desired line of motion
Parallel to the desired line of motion
Seat belts mainly prevent injuries related to which of Newton’s laws?
Law of gravitation (universal law)
Law of action and reaction (third law)
Law of inertia (first law)
Law of acceleration (second law)
Why does carrying a load on the shoulders generally reduce stability?
Increased traction through joints
Base of support is unchanged
Newton’s second law
Center of mass is higher
During concentric elbow flexion, the biceps functions as which lever class?
First‑class lever about the elbow
Fourth‑class lever about the elbow
Third‑class lever about the elbow
Second‑class lever about the elbow
During eccentric elbow flexor action while lowering a load, the biceps functions as which lever class?
Variable‑class lever about the elbow
First‑class lever about the elbow
Third‑class lever about the elbow
Second‑class lever about the elbow
Which configuration characterizes a first‑class lever created by a fixed pulley?
Force, axis, resistance aligned
Resistance, force, axis aligned
Axis, resistance, force aligned
Force and resistance at same point
In a moveable pulley, the load is attached to the pulley’s axle. What supports the load?
Two cable segments on either side
One cable segment on the free end
Friction at the groove only
Elasticity of the rope material
Which statement about mechanical advantage in pulleys is correct?
Fixed pulleys double input force
Fixed pulleys give MA of one
More moveable pulleys reduce MA
Moveable pulleys give MA less than one
A person descends a short, steep ramp and reports higher knee stress than on a long, gentle ramp of equal rise. Which biomechanical factor most likely increased?
Time under tension per stride
Mechanical advantage for force
Total travel distance required
Required braking force per step
Which best describes how pulleys are represented in the human body?
Bursae as wheels; nerves as cables
Bones as wheels; tendons as cables
Ligaments as wheels; muscles as cables
Cartilage as wheels; fascia as cables
Which statement best defines a long bone in the human body?
Irregular shape with complex projections
Length exceeds width, tube-shaped shaft
Short, cube-like dimensions in all sides
Thin, curved plate with broad surface
Which pair correctly matches bone regions with long bone structure?
Diaphysis are ends; metaphysis is shaft
Metaphysis is canal; epiphysis is marrow
Epiphysis is shaft; diaphysis are ends
Diaphysis is shaft; epiphysis are ends
What covers the articular surfaces of a long bone’s epiphysis?
Fibrocartilage and compact bone
Dense periosteal membrane only
Thick layer of elastic cartilage
Thin layer of hyaline cartilage
Which bones are typical examples of short bones?
Vertebrae and sacrum
Humerus and femur
Ilium and scapula
Carpal bones of the wrist
Which feature distinguishes short bones from long bones?
More equal height, length, width
Single hollow canal only
Articulate with one bone only
Absence of cancellous interior
Which statement about flat bones is accurate?
Highly irregular shape with spinal opening
Thick cylindrical shaft with medullary canal
Cube-like shape with large articular area
Broad surface, two compact layers with marrow
Which is a primary site of blood formation in the body?
Irregular bones like vertebrae
Long bone shafts exclusively
Short bones like carpals and tarsals
Flat bones such as ilium and cranial bones
Which description best fits irregular bones?
Varied shapes enabling specific functions
Small cubes with equal dimensions
Thin, curved plates forming broad surfaces
Tube-shaped shafts with bulbous ends
Which function is associated with openings in vertebral bones?
Anchor epiphyseal growth cartilage
Store large amounts of yellow marrow
Contain and protect the spinal cord
Reduce friction at synovial joints
Where are sesamoid bones commonly located?
Within joint capsules of flat bones
Inside medullary canals of short bones
Between epiphyses and metaphyses
Within tendons crossing long bone ends
Which role do sesamoid bones primarily serve in tendons?
Store red marrow for hematopoiesis
Protect tendons from excessive wear
Fuse with metaphyses during growth
Replace osteoclasts during remodeling
How do sesamoid bones influence muscle mechanics at joints?
Replace hyaline cartilage at epiphysis
Elongate diaphysis to shift lever arm
Decrease tendon angle to reduce force
Change tendon angle to increase torque
Which cells are chiefly responsible for bone resorption?
Osteoclasts in the endosteum
Chondrocytes in articular cartilage
Fibroblasts in ligaments
Osteoblasts in the periosteum
Which cells primarily form new bone tissue?
Chondrocytes that secrete elastic
Osteoclasts that digest matrix
Osteoblasts that build matrix
Adipocytes that store marrow
Which canal reduces bone weight and houses marrow and vessels?
Epiphyseal canal within metaphysis
Haversian canal in articular cartilage
Medullary canal within diaphysis
Synovial canal inside periosteum
Which classification fits the patella in the knee?
Sesamoid bone embedded in tendon
Irregular bone with complex shape
Short bone forming cube-like shape
Flat bone with two compact layers
Which bones dominate the appendicular skeleton by type?
Flat bones forming cranial vault mainly
Long bones forming upper and lower limbs
Irregular bones constituting all limb girdles
Short bones filling axial column largely
Which statement about axial skeleton bone types is correct?
No long or short bones are present
Mostly long bones with cube shapes
Primarily short bones with epiphyses
Exclusively flat bones like scapula
Which feature distinguishes compact bone from cancellous bone in long bones?
Higher density with organized osteons
Lower density with random osteons
Lower porosity with abundant marrow spaces
Higher porosity with sparse trabeculae
What occupies the medullary canal of a typical adult long bone?
Dense trabecular scaffolding
Cartilage forming epiphyses
Red marrow producing leukocytes
Yellow marrow rich in lipids
Synarthrodial joints primarily serve which functional role?
High mobility across planes
Shock absorption for gait
Stability with minimal motion
Energy storage during movement
Diarthrodial joints are best characterized by which feature?
Synovial cavity allowing mobility
Bone fusion eliminating movement
Fibrous tissue restricting motion
Cartilaginous discs resisting shear
Which statement correctly differentiates fibrous and cartilaginous joints?
Fibrous contain synovial fluid; cartilaginous have bursae
Fibrous are axial only; cartilaginous are appendicular only
Fibrous use dense connective tissue; cartilaginous use cartilage
Fibrous are highly mobile; cartilaginous always immobile
Which component contributes most to the heavier weight of compact bone?
Tightly packed lamellar osteons
High marrow fat content
Extensive vascular sinusoids
Large medullary cavities
Osteokinematics refers to which description of motion?
Ligaments resisting excessive motion
Surfaces gliding within the joint
Bones moving around a joint axis
Muscles producing internal torque
Arthrokinematics is defined by which movement focus?
Joint surface motion between articulations
Gross limb motion in three planes
Muscle length change during activity
Center of mass displacement in gait
Which joint type provides the greatest potential range of motion, with trade-offs in stability?
Primary cartilaginous joints
Secondary cartilaginous joints
Synarthrodial fibrous joints
Diarthrodial synovial joints
Which best describes trabeculae within cancellous bone?
Solid rods resisting torsion only
Dense tubes forming Haversian canals
Random plates without orientation
Struts aligned along stress lines
Where does longitudinal growth in height primarily occur in long bones?
Epiphyseal growth plate region
Articular cartilage surface
Medullary canal lining
Periosteal outer surface
