NEW
Font size
WorksheetsSmooth, Cardiac & Skeletal Muscle Characteristics
Total questions: 50
Worksheet time: 25mins
What is the primary difference between multiunit smooth muscle and visceral smooth muscle?
Structure and function
Color and size
Location and density
Temperature and flexibility
What is one of the objectives related to cardiac and skeletal muscles?
Compare their color
Compare their contraction mechanism
Compare their size
Compare their density
What characteristic do smooth muscle cells lack?
Striations
Nuclei
Cytoplasm
Cell membrane
How are the filaments in smooth muscle cells arranged?
In parallel lines
In a grid pattern
More randomly
In concentric circles
What is relatively undeveloped in smooth muscle cells?
Mitochondria
Sarcoplasmic reticulum
Golgi apparatus
Ribosomes
What is a characteristic of multiunit smooth muscle?
Fibers occur in sheets
Found in the walls of hollow organs
Found in blood vessels
Stimulates peristalsis
Where is visceral smooth muscle typically found?
In the blood vessels
In the iris of the eye
In the walls of hollow organs
In the skin
What function does visceral smooth muscle perform in tubular organs?
Contraction of blood vessels
Peristalsis
Reflex actions
Hormone secretion
What is a similarity between smooth muscle contraction and skeletal muscle contraction?
Only smooth muscle involves actin and myosin
Both types use ATP energy
Only skeletal muscle requires calcium ions
Both types are not stimulated by membrane impulses
Which of the following is required for both smooth and skeletal muscle contractions?
Increase in sodium ions in the cells
Decrease in calcium ions in the cells
Increase in calcium ions in the cells
Decrease in potassium ions in the cells
Which neurotransmitters stimulate and inhibit smooth muscle contraction?
Only acetylcholine (ACh)
Only norepinephrine
Both acetylcholine (ACh) and norepinephrine
Neither acetylcholine (ACh) nor norepinephrine
What can hormones do to smooth muscle that they cannot do to skeletal muscle?
Stimulate contraction only
Inhibit contraction only
Stimulate or inhibit contraction
Have no effect
How does smooth muscle contraction compare to skeletal muscle in terms of speed?
Smooth muscle contracts and relaxes faster
Smooth muscle contracts and relaxes slower
Both contract and relax at the same speed
Smooth muscle does not contract
What is a unique characteristic of smooth muscle regarding its contraction and ATP usage?
Uses more ATP for shorter contractions
Maintains a contraction longer with the same amount of ATP
Uses less ATP for shorter contractions
Does not use ATP
Where is cardiac muscle found?
In the lungs
In the heart
In the liver
In the kidneys
What type of cells does cardiac muscle consist of?
Smooth, non-striated cells
Branching, striated cells
Elongated, non-striated cells
Circular, smooth cells
What is a key difference in the sarcoplasmic reticulum of cardiac muscle compared to skeletal muscle?
It is well-developed and stores a lot of calcium.
It is not well-developed and does not store much calcium.
It stores more calcium than skeletal muscle.
It does not play a role in muscle contraction.
How do transverse tubules in cardiac muscle contribute to muscle contraction?
They prevent calcium from entering the cell.
They supply extra calcium from extracellular fluid.
They remove calcium from the cell.
They have no role in calcium supply.
What is a unique characteristic of cardiac muscle compared to skeletal and smooth muscle?
It is voluntary and non-rhythmic.
It is self-exciting and rhythmic.
It does not contract.
It is controlled by the nervous system only.
What are the complex membrane junctions in cardiac muscle called?
Sarcomeres
Myofibrils
Intercalated discs
Synapses
What happens when one portion of the cardiac muscle is stimulated?
Only that portion contracts.
The impulse is isolated to that area.
The whole structure contracts as a functional unit.
The muscle relaxes immediately.
What is the major location of smooth muscle tissue?
Skeletal muscles
Walls of hollow viscera, blood vessels
Wall of the heart
Skin
What is a characteristic of skeletal muscle tissue?
Single nucleus
Absent striations
Many nuclei
Lacks transverse tubules
Which muscle tissue type is under voluntary control?
Skeletal
Smooth
Cardiac
Nervous
What is the less movable end of a skeletal muscle called?
Insertion
Origin
Muscle Belly
Tendon
Which part of a skeletal muscle is described as the more movable end?
Origin
Muscle Belly
Insertion
Ligament
What happens during muscle contraction in terms of origin and insertion?
The origin moves toward the insertion
The insertion moves toward the origin
Both origin and insertion move away from each other
The muscle belly expands
What is the thick midsection of a muscle called?
Origin
Insertion
Muscle Belly
Tendon
What does the term "biceps" mean in the context of muscle anatomy?
2 insertions
2 origins or heads
2 muscles
2 tendons
Where do both heads of the biceps brachii attach?
Portions of the humerus
Portions of the scapula
Portions of the ulna
Portions of the clavicle
What is the insertion point of the biceps brachii?
Radial tuberosity of the radius
Olecranon of the ulna
Acromion of the scapula
Greater tubercle of the humerus
What is the primary action of the biceps brachii?
Extension of the forearm at the elbow
Flexion of the forearm at the elbow
Rotation of the forearm
Abduction of the arm
How do bones and muscles interact for movement?
As springs
As levers
As pulleys
As gears
In the bending of the upper limb, what acts as the fulcrum or pivot?
Wrist joint
Shoulder joint
Elbow joint
Finger joint
What is flexion in terms of muscle relationships?
Increase in the angle between bones at a joint
Decrease in the angle between bones at a joint
No change in the angle between bones at a joint
Rotation of bones at a joint
What happens during the extension of the arm at the elbow?
The arm bends
The arm straightens
The arm rotates
The arm remains still
What is the term for the muscle that causes an action and does the majority of the work?
Antagonist
Synergist
Agonist (prime mover)
Stabilizer
What are muscles called that assist the prime mover?
Antagonists
Synergists
Agonists
Flexors
What is the role of muscles that oppose an action?
Agonists
Synergists
Antagonists
Stabilizers
How can the relationship between muscles change?
A muscle can only be an agonist.
A muscle can only be a synergist.
A muscle can be a synergist for one action and an antagonist for another.
A muscle can only be an antagonist.
Which muscle acts as the antagonist during a biceps curl?
Biceps brachii
Triceps brachii
Brachialis
Rhomboideus
What role does the brachialis muscle play during a biceps curl?
Prime mover
Antagonist
Synergist
Fixator
Skeletal muscles are named according to which of the following criteria?
Color of the muscle
Size of the muscle
Temperature of the muscle
Age of the muscle
Which of the following is NOT a factor in naming skeletal muscles?
Shape of the muscle
Location of the muscle
Number of attachments
Taste of the muscle
Which muscle is named for its size and location, and is located in the chest?
Deltoid
Pectoralis major
Biceps brachii
External oblique
Which muscle is shaped like a triangle?
Extensor digitorum
Sternocleidomastoid
Deltoid
Pectoralis major
Which muscle is responsible for extending digits such as fingers and toes?
Biceps brachii
Extensor digitorum
External oblique
Deltoid
Which muscle attaches to the sternum, clavicle, and mastoid process?
Sternocleidomastoid
Deltoid
Extensor digitorum
Pectoralis major
Which muscle is located near the outside of the abdomen and has fibers that run at a slant?
Biceps brachii
External oblique
Deltoid
Extensor digitorum
Is smooth muscle voluntary or involuntary?
Voluntary
Involuntary
Semi-voluntary
None of the above
