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A&P Exam 2 chapter quizzes

Total questions: 141

Worksheet time: 1hrs 11mins

Name
Class
Date
1.

Which function of the skeletal system would be especially important if you were in a car accident?

a)

storage of minerals

b)

protection of internal organs

c)

facilitation of movement

d)

fat storage

2.

Bone tissue can be described as ________.

a)

dead calcified tissue

b)

cartilage

c)

the skeletal system

d)

dense, hard connective tissue

3.

Without red marrow, bones would not be able to ________.

a)

store phosphate

b)

store calcium

c)

make blood cells

d)

move like levers

4.

Yellow marrow has been identified as ________.

a)

an area of fat storage

b)

a point of attachment for muscles

c)

the hard portion of bone

d)

the cause of kyphosis

5.

Which of the following can be found in areas of movement?

a)

hematopoiesis

b)

cartilage

c)

yellow marrow

d)

red marrow

6.

The skeletal system is made of ________.

a)

muscles and tendons

b)

bones and cartilage

c)

vitreous humor

d)

minerals and fat

7.

Most of the bones of the arms and hands are long bones; however, the bones in the wrist are categorized as ________.

a)

flat bones

b)

short bones

c)

sesamoid bones

d)

irregular bones

8.

Sesamoid bones are found embedded in ________.

a)

joints

b)

muscles

c)

ligaments

d)

tendons

9.

Bones that surround the spinal cord are classified as ________ bones.

a)

irregular

b)

sesamoid

c)

flat

d)

short

10.

Which category of bone is among the most numerous in the skeleton?

a)

long bone

b)

sesamoid bone

c)

short bone

d)

flat bone

11.

Long bones enable body movement by acting as a ________.

a)

counterweight

b)

resistive force

c)

lever

d)

fulcrum

12.

Which of the following occurs in the spongy bone of the epiphysis?

a)

bone growth

b)

bone remodeling

c)

hematopoiesis

d)

shock absorption

13.

The diaphysis contains ________.

a)

the metaphysis

b)

fat stores

c)

spongy bone

d)

compact bone

14.

The fibrous membrane covering the outer surface of the bone is the ________.

a)

periosteum

b)

epiphysis

c)

endosteum

d)

diaphysis

15.

Which of the following are incapable of undergoing mitosis?

a)

osteoblasts and osteoclasts

b)

osteocytes and osteoclasts

c)

osteoblasts and osteocytes

d)

osteogenic cells and osteoclasts

16.

Which cells do not originate from osteogenic cells?

a)

osteoblasts

b)

osteoclasts

c)

osteocytes

d)

osteoprogenitor cells

17.

Which of the following are found in compact bone and cancellous bone?

a)

Haversian systems

b)

Haversian canals

c)

lamellae

d)

lacunae

18.

Which of the following are only found in cancellous bone?

a)

canaliculi

b)

Volkmann’s canals

c)

trabeculae

d)

calcium salts

19.

The area of a bone where the nutrient foramen passes forms what kind of bone marking?

a)

a hole

b)

a facet

c)

a canal

d)

a fissure

20.

Why is cartilage slow to heal?

a)

because it eventually develops into bone

b)

because it is semi-solid and flexible

c)

because it does not have a blood supply

d)

because endochondral ossification replaces all cartilage with bone

21.

Why are osteocytes spread out in bone tissue?

a)

They develop from mesenchymal cells.

b)

They are surrounded by osteoid.

c)

They travel through the capillaries.

d)

Formation of osteoid spreads out the osteoblasts that formed the ossification centers.

22.

In endochondral ossification, what happens to the chondrocytes?

a)

They develop into osteocytes.

b)

They die in the calcified matrix that surrounds them and form the medullary cavity.

c)

They grow and form the periosteum.

d)

They group together to form the primary ossification center.

23.

Which of the following bones is (are) formed by intramembranous ossification?

a)

the metatarsals

b)

the femur

c)

the ribs

d)

the flat bones of the cranium

24.

Bones grow in length due to activity in the ________.

a)

epiphyseal plate

b)

perichondrium

c)

periosteum

d)

medullary cavity

25.

Bones grow in diameter due to bone formation ________.

a)

in the medullary cavity

b)

beneath the periosteum

c)

in the epiphyseal plate

d)

within the metaphysis

26.

Which of the following represents the correct sequence of zones in the epiphyseal plate?

a)

proliferation, reserved, maturation, calcification

b)

maturation, proliferation, reserved, calcification

c)

calcification, maturation, proliferation, reserved

d)

calcification, reserved, proliferation, maturation

27.

A fracture can be both ________.

a)

open and closed

b)

open and transverse

c)

transverse and greenstick

d)

greenstick and comminuted

28.

How can a fractured diaphysis release fat globules into the bloodstream?

a)

The bone pierces fat stores in the skin.

b)

The yellow marrow in the diaphysis is exposed and damaged.

c)

The injury triggers the body to release fat from healthy bones.

d)

The red marrow in the fractured bone releases fat to heal the fracture.

29.

In a compound fracture, ________.

a)

the break occurs at an angle to the bone

b)

the broken bone does not tear the skin

c)

one fragment of broken bone is compressed into the other

d)

broken bone pierces the skin

30.

The internal and external calli are replaced by ________.

a)

hyaline cartilage

b)

trabecular bone

c)

osteogenic cells

d)

osteoclasts

31.

The first type of bone to form during fracture repair is ________ bone.

a)

compact

b)

lamellar

c)

spongy

d)

dense

32.

Wolff’s law, which describes the effect of mechanical forces in bone modeling/remodeling, would predict that ________

a)

a right-handed pitcher will have thicker bones in his right arm compared to his left.

b)

a right-handed cyclist will have thicker bones in her right leg compared to her left.

c)

a broken bone will heal thicker than it was before the fracture.

d)

a bed-ridden patient will have thicker bones than an athlete.

33.

Calcium cannot be absorbed from the small intestine if ________ is lacking.

a)

vitamin D

b)

vitamin K

c)

calcitonin

d)

fluoride

34.

Which one of the following foods is best for bone health?

a)

carrots

b)

liver

c)

leafy green vegetables

d)

oranges

35.

Which of the following hormones are responsible for the adolescent growth spurt?

a)

estrogen and testosterone

b)

calcitonin and calcitriol

c)

growth hormone and parathyroid hormone

d)

thyroxine and progesterone

36.

With respect to their direct effects on osseous tissue, which pair of hormones has actions that oppose each other?

a)

estrogen and testosterone

b)

calcitonin and calcitriol

c)

estrogen and progesterone

d)

calcitonin and parathyroid hormone

37.

When calcium levels are too high or too low, which body system is primarily affected?

a)

skeletal system

b)

endocrine system

c)

digestive system

d)

nervous system

38.

All of the following play a role in calcium homeostasis except

a)

thyroxine

b)

calcitonin

c)

parathyroid hormone

d)

vitamin D

39.

Which of the following is most likely to be released when blood calcium levels are elevated?

a)

thyroxine

b)

calcitonin

c)

parathyroid hormone

d)

vitamin D

40.

Which of the following is part of the axial skeleton?

a)

shoulder bones

b)

thigh bone

c)

foot bones

d)

vertebral column

41.

Which of the following is a function of the axial skeleton?

a)

allows for movement of the wrist and hand

b)

protects nerves and blood vessels at the elbow

c)

supports trunk of body

d)

allows for movements of the ankle and foot

42.

The axial skeleton ________.

a)

consists of 126 bones

b)

forms the vertical axis of the body

c)

includes all bones of the body trunk and limbs

d)

includes only the bones of the lower limbs

43.

Which of the following is a bone of the brain case?

a)

parietal bone

b)

zygomatic bone

c)

maxillary bone

d)

lacrimal bone

44.

The lambdoid suture joins the parietal bone to the ________.

a)

frontal bone

b)

occipital bone

c)

other parietal bone

d)

temporal bone

45.

The middle cranial fossa ________.

a)

is bounded anteriorly by the petrous ridge

b)

is bounded posteriorly by the lesser wing of the sphenoid bone

c)

is divided at the midline by a small area of the ethmoid bone

d)

has the foramen rotundum, foramen ovale, and foramen spinosum

46.

The paranasal sinuses are ________.

a)

air-filled spaces found within the frontal, maxilla, sphenoid, and ethmoid bones only

b)

air-filled spaces found within all bones of the skull

c)

not connected to the nasal cavity

d)

divided at the midline by the nasal septum

47.

Parts of the sphenoid bone include the ________.

a)

sella turcica

b)

squamous portion

c)

glabella

d)

zygomatic process

48.

The bony openings of the skull include the ________.

a)

carotid canal, which is located in the anterior cranial fossa

b)

superior orbital fissure, which is located at the superior margin of the anterior orbit

c)

mental foramen, which is located just below the orbit

d)

hypoglossal canal, which is located in the posterior cranial fossa

49.

The cervical region of the vertebral column consists of ________.

a)

seven vertebrae

b)

12 vertebrae

c)

five vertebrae

d)

a single bone derived from the fusion of five vertebrae

50.

The primary curvatures of the vertebral column ________.

a)

include the lumbar curve

b)

are remnants of the original fetal curvature

c)

include the cervical curve

d)

develop after the time of birth

51.

A typical vertebra has ________.

a)

a vertebral foramen that passes through the body

b)

superior articular process that projects downward to articulate with the superior portion of the next lower vertebra

c)

lamina that spans between the transverse process and spinous process

d)

a pair of laterally projecting spinous processes

52.

A typical lumbar vertebra has ________.

a)

a short, rounded spinous process

b)

a bifid spinous process

c)

articulation sites for ribs

d)

a transverse foramen

53.

Which is found only in the cervical region of the vertebral column?

a)

nuchal ligament

b)

ligamentum flavum

c)

supraspinous ligament

d)

anterior longitudinal ligament

54.

The sternum ________.

a)

consists of only two parts, the manubrium and xiphoid process

b)

has the sternal angle located between the manubrium and body

c)

receives direct attachments from the costal cartilages of all 12 pairs of ribs

d)

articulates directly with the thoracic vertebrae

55.

The sternal angle is the ________.

a)

junction between the body and xiphoid process

b)

site for attachment of the clavicle

c)

site for attachment of the floating ribs

d)

junction between the manubrium and body

56.

The tubercle of a rib ________.

a)

is for articulation with the transverse process of a thoracic vertebra

b)

is for articulation with the body of a thoracic vertebra

c)

provides for passage of blood vessels and a nerve

d)

is the area of greatest rib curvature

57.

True ribs are ________.

a)

ribs 8–12

b)

attached via their costal cartilage to the next higher rib

c)

made entirely of bone, and thus do not have a costal cartilage

d)

attached via their costal cartilage directly to the sternum

58.

Embryonic development of the axial skeleton involves ________.

a)

intramembranous ossification, which forms the facial bones.

b)

endochondral ossification, which forms the ribs and sternum

c)

the notochord, which produces the cartilage models for the vertebrae

d)

the formation of hyaline cartilage models, which give rise to the flat bones of the skull

59.

A fontanelle ________.

a)

is the cartilage model for a vertebra that later is converted into bone

b)

gives rise to the facial bones and vertebrae

c)

is the rod-like structure that runs the length of the early embryo

d)

is the area of fibrous connective tissue found at birth between the brain case bones

60.

Which part of the clavicle articulates with the manubrium?

a)

shaft

b)

sternal end

c)

acromial end

d)

coracoid process

61.

A shoulder separation results from injury to the ________.

a)

glenohumeral joint

b)

costoclavicular joint

c)

acromioclavicular joint

d)

sternoclavicular joint

62.

Which feature lies between the spine and superior border of the scapula?

a)

suprascapular notch

b)

glenoid cavity

c)

superior angle

d)

supraspinous fossa

63.

What structure is an extension of the spine of the scapula?

a)

acromion

b)

coracoid process

c)

supraglenoid tubercle

d)

glenoid cavity

64.

Name the short, hook-like bony process of the scapula that projects anteriorly.

a)

acromial process

b)

clavicle

c)

coracoid process

d)

glenoid fossa

65.

How many bones are there in the upper limbs combined?

a)

20

b)

30

c)

40

d)

60

66.

Which bony landmark is located on the lateral side of the proximal humerus?

a)

greater tubercle

b)

trochlea

c)

lateral epicondyle

d)

lesser tubercle

67.

Which region of the humerus articulates with the radius as part of the elbow joint?

a)

trochlea

b)

styloid process

c)

capitulum

d)

olecranon process

68.

Which is the lateral-most carpal bone of the proximal row?

a)

trapezium

b)

hamate

c)

pisiform

d)

scaphoid

69.

The radius bone ________.

a)

is found on the medial side of the forearm

b)

has a head that articulates with the radial notch of the ulna

c)

does not articulate with any of the carpal bones

d)

has the radial tuberosity located near its distal end

70.

How many bones fuse in adulthood to form the hip bone?

a)

2

b)

3

c)

4

d)

5

71.

Which component forms the superior part of the hip bone?

a)

ilium

b)

pubis

c)

ischium

d)

sacrum

72.

Which of the following supports body weight when sitting?

a)

iliac crest

b)

ischial tuberosity

c)

ischiopubic ramus

d)

pubic body

73.

The ischial spine is found between which of the following structures?

a)

inferior pubic ramus and ischial ramus

b)

pectineal line and arcuate line

c)

lesser sciatic notch and greater sciatic notch

d)

anterior superior iliac spine and posterior superior iliac spine

74.

The pelvis ________.

a)

has a subpubic angle that is larger in females

b)

consists of the two hip bones, but does not include the sacrum or coccyx

c)

has an obturator foramen, an opening that is defined in part by the sacrospinous and sacrotuberous ligaments

d)

has a space located inferior to the pelvic brim called the greater pelvis

75.

Which bony landmark of the femur serves as a site for muscle attachments?

a)

fovea capitis

b)

lesser trochanter

c)

head

d)

medial condyle

76.

What structure contributes to the knee joint?

a)

lateral malleolus of the fibula

b)

tibial tuberosity

c)

medial condyle of the tibia

d)

lateral epicondyle of the femur

77.

Which tarsal bone articulates with the tibia and fibula?

a)

calcaneus

b)

cuboid

c)

navicular

d)

talus

78.

What is the total number of bones found in the foot and toes?

a)

7

b)

14

c)

26

d)

30

79.

The tibia ________.

a)

has an expanded distal end called the lateral malleolus

b)

is not a weight-bearing bone

c)

is firmly anchored to the fibula by an interosseous membrane

d)

can be palpated (felt) under the skin only at its proximal and distal ends

80.

Which event takes place during the seventh week of development?

a)

appearance of the upper and lower limb buds

b)

flattening of the distal limb bud into a paddle shape

c)

the first appearance of hyaline cartilage models of future bones

d)

the rotation of the limbs

81.

During endochondral ossification of a long bone, ________.

a)

a primary ossification center will develop within the epiphysis

b)

mesenchyme will differentiate directly into bone tissue

c)

growth of the epiphyseal plate will produce bone lengthening

d)

all epiphyseal plates will disappear before birth

82.

The clavicle ________.

a)

develops via intramembranous ossification

b)

develops via endochondral ossification

c)

is the last bone of the body to begin ossification

d)

is fully ossified at the time of birth

83.

The joint between adjacent vertebrae that includes an invertebral disc is classified as which type of joint?

a)

diarthrosis multiaxial amphiarthrosis synarthrosis

b)

multiaxial

c)

amphiarthrosis

d)

synarthrosis

84.

Which of these joints is classified as a synarthrosis?

a)

the pubic symphysis

b)

the manubriosternal joint

c)

an invertebral disc

d)

the shoulder joint

85.

Which of these joints is classified as a biaxial diarthrosis?

a)

the metacarpophalangeal joint

b)

joint the hip joint

c)

the elbow joint

d)

the pubic symphysis

86.

Synovial joints ________.

a)

may be functionally classified as a synarthrosis

b)

are joints where the bones are connected to each other by hyaline cartilage

c)

may be functionally classified as a amphiarthrosis

d)

are joints where the bones articulate with each other within a fluid-filled joint cavity

87.

Which type of fibrous joint connects the tibia and fibula?

a)

syndesmosis

b)

symphysis

c)

suture

d)

gomphosis

88.

An example of a wide fibrous joint is ________.

a)

the interosseous membrane of the forearma

b)

a gomphosis

c)

a suture joint

d)

a synostosis

89.

A gomphosis ________.

a)

is formed by an interosseous membrane

b)

connects the tibia and fibula bones of the leg

c)

contains a joint cavity

d)

anchors a tooth to the jaw

90.

A syndesmosis is ________.

a)

a narrow fibrous joint

b)

the type of joint that unites bones of the skull

c)

a fibrous joint that unites parallel bones

d)

the type of joint that anchors the teeth in the jaws

91.

A cartilaginous joint ________.

a)

has a joint cavity

b)

is called a symphysis when the bones are united by fibrocartilage

c)

anchors the teeth to the jaws

d)

is formed by a wide sheet of fibrous connective tissue

92.

A synchondrosis is ________.

a)

found at the pubic symphysis

b)

where bones are connected together with fibrocartilage

c)

a type of fibrous joint

d)

found at the first sternocostal joint of the thoracic cage

93.

Which of the following are joined by a symphysis?

a)

adjacent vertebrae

b)

the first rib and the sternum

c)

the end and shaft of a long bone

d)

the radius and ulna bones

94.

The epiphyseal plate of a growing long bone in a child is classified as a ________.

a)

synchondrosis

b)

synostosis

c)

symphysis

d)

syndesmosis

95.

Which type of joint provides the greatest range of motion?

a)

ball-and-socket

b)

hinge

c)

condyloid

d)

plane

96.

Which type of joint allows for only uniaxial movement?

a)

saddle joint

b)

hinge joint

c)

condyloid joint

d)

ball-and-socket joint

97.

Which of the following is a type of synovial joint?

a)

a synostosis

b)

a suture

c)

a plane joint

d)

a synchondrosis

98.

A bursa ________.

a)

surrounds a tendon at the point where the tendon crosses a joint

b)

secretes the lubricating fluid for a synovial joint

c)

prevents friction between skin and bone, or a muscle tendon and bone

d)

is the strong band of connective tissue that holds bones together at a synovial joint

99.

At synovial joints, ________.

a)

the articulating ends of the bones are directly connected by fibrous connective tissue

b)

the ends of the bones are enclosed within a space called a subcutaneous bursa

c)

intrinsic ligaments are located entirely inside of the articular capsule

d)

the joint cavity is filled with a thick, lubricating fluid

100.

At a synovial joint, the synovial membrane ________.

a)

forms the fibrous connective walls of the joint cavity

b)

is the layer of cartilage that covers the articulating surfaces of the bones

c)

forms the intracapsular ligaments

d)

secretes the lubricating synovial fluid

101.

Condyloid joints ________.

a)

are a type of ball-and-socket joint

b)

include the radiocarpal joint

c)

are a uniaxial diarthrosis joint

d)

are found at the proximal radioulnar joint

102.

A meniscus is ________.

a)

a fibrocartilage pad that provides padding between bones

b)

a fluid-filled space that prevents friction between a muscle tendon and underlying bone

c)

the articular cartilage that covers the ends of a bone at a synovial joint

d)

the lubricating fluid within a synovial joint

103.

The joints between the articular processes of adjacent vertebrae can contribute to which movement?

a)

lateral flexion

b)

circumduction

c)

dorsiflexion

d)

abduction

104.

Which motion moves the bottom of the foot away from the midline of the body?

a)

elevation

b)

dorsiflexion

c)

eversion

d)

plantar flexion

105.

Movement of a body region in a circular movement at a condyloid joint is what type of motion?

a)

rotation

b)

elevation

c)

abduction

d)

circumduction

106.

Supination is the motion that moves the ________.

a)

hand from the palm backward position to the palm forward position

b)

foot so that the bottom of the foot faces the midline of the body

c)

hand from the palm forward position to the palm backward position

d)

scapula in an upward direction

107.

Movement at the shoulder joint that moves the upper limb laterally away from the body is called ________.

a)

elevation

b)

eversion

c)

abduction

d)

lateral rotation

108.

The primary support for the glenohumeral joint is provided by the ________.

a)

coracohumeral ligament

b)

glenoid labrum

c)

rotator cuff muscles

d)

subacromial bursa

109.

The proximal radioulnar joint ________.

a)

is supported by the annular ligament

b)

contains an articular disc that strongly unites the bones

c)

is supported by the ulnar collateral ligament

d)

is a hinge joint that allows for flexion/extension of the forearm

110.

Which statement is true concerning the knee joint?

a)

The lateral meniscus is an intrinsic ligament located on the lateral side of the knee joint.

b)

Hyperextension is resisted by the posterior cruciate ligament.

c)

The anterior cruciate ligament supports the knee when it is flexed and weight bearing.

d)

The medial meniscus is attached to the tibial collateral ligament.

111.

The ankle joint ________.

a)

is also called the subtalar joint

b)

allows for gliding movements that produce inversion/eversion of the foot

c)

is a uniaxial hinge joint

d)

is supported by the tibial collateral ligament on the lateral side

112.

Which region of the vertebral column has the greatest range of motion for rotation?

a)

cervical

b)

thoriac

c)

lumbar

d)

sacral

113.

Intramembranous ossification ________.

a)

gives rise to the bones of the limbs

b)

produces the bones of the top and sides of the skull

c)

produces the bones of the face and base of the skull

d)

involves the conversion of a hyaline cartilage model into bone

114.

Synovial joints ________.

a)

are derived from fontanelles

b)

are produced by intramembranous ossification

c)

develop at an interzone site

d)

are produced by endochondral ossification

115.

Endochondral ossification is ________.

a)

the process that replaces hyaline cartilage with bone tissue

b)

the process by which mesenchyme differentiates directly into bone tissue

c)

completed before birth

d)

the process that gives rise to the joint interzone and future joint cavity

116.

Muscle that has a striped appearance is described as being ________.

a)

elastic

b)

nonstriated

c)

excitable

d)

striated

117.

Which element is important in directly triggering contraction?

a)

sodium (Na+)

b)

calcium (Ca++)

c)

potassium (K+)

d)

chloride (Cl-)

118.

Which of the following properties is not common to all three muscle tissues?

a)

excitability

b)

the need for ATP

c)

at rest, uses shielding proteins to cover actin-binding sites

d)

elasticity

119.

The correct order for the smallest to the largest unit of organization in muscle tissue is ________.

a)

fascicle, filament, muscle fiber, myofibril

b)

filament, myofibril, muscle fiber, fascicle

c)

muscle fiber, fascicle, filament, myofibril

d)

myofibril, muscle fiber, filament, fascicle

120.

Depolarization of the sarcolemma means ________.

a)

the inside of the membrane has become less negative as sodium ions accumulate

b)

the outside of the membrane has become less negative as sodium ions accumulate

c)

the inside of the membrane has become more negative as sodium ions accumulate

d)

the sarcolemma has completely lost any electrical charge

121.

In relaxed muscle, the myosin-binding site on actin is blocked by ________.

a)

titin

b)

troponin

c)

myoglobin

d)

tropomyosin

122.

According to the sliding filament model, binding sites on actin open when ________.

a)

creatine phosphate levels rise

b)

ATP levels rise

c)

acetylcholine levels rise

d)

calcium ion levels rise

123.

The cell membrane of a muscle fiber is called ________.

a)

myofibril

b)

sarcolemma

c)

sarcoplasm

d)

myofilament

124.

Muscle relaxation occurs when ________.

a)

calcium ions are actively transported out of the sarcoplasmic reticulum

b)

calcium ions diffuse out of the sarcoplasmic reticulum

c)

calcium ions are actively transported into the sarcoplasmic reticulum

d)

calcium ions diffuse into the sarcoplasmic reticulum

125.

During muscle contraction, the cross-bridge detaches when ________.

a)

the myosin head binds to an ADP molecule

b)

the myosin head binds to an ATP molecule

c)

calcium ions bind to troponin

d)

calcium ions bind to actin

126.

Thin and thick filaments are organized into functional units called ________.

a)

myofibrils

b)

myofilaments

c)

T-tubules

d)

sarcomeres

127.

During which phase of a twitch in a muscle fiber is tension the greatest?

a)

resting phase

b)

repolarization phase

c)

contraction phase

d)

relaxation phase

128.

Muscle fatigue is caused by ________.

a)

buildup of ATP and lactic acid levels

b)

exhaustion of energy reserves and buildup of lactic acid levels

c)

buildup of ATP and pyruvic acid levels

d)

exhaustion of energy reserves and buildup of pyruvic acid levels

129.

A sprinter would experience muscle fatigue sooner than a marathon runner due to ________.

a)

anaerobic metabolism in the muscles of the sprinter

b)

anaerobic metabolism in the muscles of the marathon runner

c)

aerobic metabolism in the muscles of the sprinter

d)

glycolysis in the muscles of the marathon runner

130.

What aspect of creatine phosphate allows it to supply energy to muscles?

a)

ATPase activity

b)

phosphate bonds

c)

carbon bonds

d)

hydrogen bonds

131.

Drug X blocks ATP regeneration from ADP and phosphate. How will muscle cells respond to this drug?

a)

by absorbing ATP from the bloodstream

b)

by using ADP as an energy source

c)

by using glycogen as an energy source

d)

none of the above

132.

The muscles of a professional sprinter are most likely to have ________.

a)

80 percent fast-twitch muscle fibers and 20 percent slow-twitch muscle fibers

b)

20 percent fast-twitch muscle fibers and 80 percent slow-twitch muscle fibers

c)

50 percent fast-twitch muscle fibers and 50 percent slow-twitch muscle fibers

d)

40 percent fast-twitch muscle fibers and 60 percent slow-twitch muscle fibers

133.

The muscles of a professional marathon runner are most likely to have ________.

a)

80 percent fast-twitch muscle fibers and 20 percent slow-twitch muscle fibers

b)

20 percent fast-twitch muscle fibers and 80 percent slow-twitch muscle fibers

c)

50 percent fast-twitch muscle fibers and 50 percent slow-twitch muscle fibers

d)

40 percent fast-twitch muscle fibers and 60 percent slow-twitch muscle fibers

134.

Which of the following statements is true?

a)

Fast fibers have a small diameter.

b)

Fast fibers contain loosely packed myofibrils.

c)

Fast fibers have large glycogen reserves.

d)

Fast fibers have many mitochondria.

135.

Which of the following statements is false?

a)

Slow fibers have a small network of capillaries.

b)

Slow fibers contain the pigment myoglobin.

c)

Slow fibers contain a large number of mitochondria.

d)

Slow fibers contract for extended periods.

136.

Cardiac muscles differ from skeletal muscles in that they ________.

a)

are striated

b)

utilize aerobic metabolism

c)

contain myofibrils

d)

contain intercalated discs

137.

If cardiac muscle cells were prevented from undergoing aerobic metabolism, they ultimately would ________.

a)

undergo glycolysis

b)

synthesize ATP

c)

stop contracting

d)

start contracting

138.

Smooth muscles differ from skeletal and cardiac muscles in that they ________.

a)

lack myofibrils

b)

are under voluntary control

c)

lack myosin

d)

lack actin

139.

Which of the following statements describes smooth muscle cells?

a)

They are resistant to fatigue.

b)

They have a rapid onset of contractions.

c)

They cannot exhibit tetanus.

d)

They primarily use anaerobic metabolism.

140.

From which embryonic cell type does muscle tissue develop?

a)

ganglion cells

b)

myotube cells

c)

myoblast cells

d)

satellite cells

141.

Which cell type helps to repair injured muscle fibers?

a)

ganglion cells

b)

myotube cells

c)

myoblast cells

d)

satellite cells