Chapter 8 Muscle Test Practice

Question 1

When the sternocephalicus muscle contracts what happens in the animal’s body?

Answer 1

the head and neck are lowered

Question 2

Which three muscles make up the hamstring muscle?

Answer 2

biceps femoris, semitendinosus, semimembranosus

Question 3

The outermost connective tissue layer of a muscle is the

Answer 3

Epimysium (surrounds the entire muscle)

Question 4

The two major sources of energy for normal muscle metabolism are

Answer 4

glucose and oxygen

Question 5

Cardiac muscle is classified as

Answer 5

involuntary striated muscle

Question 6

Smooth muscle is classified as

Answer 6

involuntary nonstriated muscle

Question 7

What type of muscle controls the movement of an animal’s skeleton?

Answer 7

voluntary striated muscle

Question 8

In muscle the source of a phosphate molecule needed to recharge an ADP molecule to an ATP molecule is

Answer 8

creatine phosphate.

Question 9

The diaphragm is composed of

Answer 9

Voluntary striated muscle

Question 10

Which motor unit would an animal most likely use to move its eyeball?

Answer 10

1 nerve fiber, 2 muscle fibers

Question 11

The respiratory muscles that work together to increase the size of the thoracic cavity when they contract are the

Answer 11

diaphragm and external intercostal muscles.

Question 12

The internal abdominal oblique muscle is partially named based on

Answer 12

the direction its fibers run

Question 13

Another name for a skeletal muscle cell is a skeletal muscle

Answer 13

fiber

Question 14

The linea alba is a/an

Answer 14

aponeurosis.

Question 15

The “pacemaker” of the heart is the sinoatrial node located in the wall of the

Answer 15

right atrium

Question 16

The average muscle fiber contraction cycle lasts about

Answer 16

0.1 second

Question 17

What type of muscle controls the movement of an animal’s skeleton?

Answer 17

voluntary striated muscle

Question 18

Stretching the wall of the small intestines will result in

Answer 18

increased force of visceral smooth muscle contraction

Question 19

The muscle in an animal that corresponds to the calf muscle in humans is the

Answer 19

gastrocnemius muscle

Question 20

When skeletal muscle contracts, which site undergoes the greatest movement?

Answer 20

insertion of the muscle

Question 21

If the fibers of a muscle are running caudoventrally, in which direction are they running?

Answer 21

to the back of the animal and down

Question 22

The parasympathetic nervous system has this overall effect on the heart.

Answer 22

It causes it to beat slower with less force.

Question 23

Anaerobic muscle metabolism results in __ formation as a result of incomplete glucose metabolism.

Answer 23

lactic acid

Question 24

The contracting unit of a skeletal muscle is the

Answer 24

sarcomere

Question 25

The all-or-nothing principle of muscle physiology refers to

Answer 25

the contraction of a muscle

Question 26

Which structure of a muscle contains adipose tissue that contributes to the grossly visible marbling of meat?

Answer 26

perimysium

Question 27

Groups of cardiac muscle cells adapt their contraction rate to

Answer 27

the fastest cell

Question 28

The triceps brachii muscle is partially named based on

Answer 28

its location

Question 29

Which structures contain visceral smooth muscle?

Answer 29

stomach and urinary bladder

Question 30

A skeletal muscle that contracts at the same time as the prime mover muscle and assists in carrying out the prime mover’s action is a/an

Answer 30

synergist