Question 1

Match the following muscles to their function.
-bends forearm at elbow

Accepted Answer

A) gastrocnemius 
B) deltoid 
C) external oblique 
D) triceps brachii 
E) quadriceps
F)tibialis anterior
G)biceps brachii
H)trapezius 
A) gastrocnemius 
B) deltoid 
C) external oblique 
D) triceps brachii 
E) quadriceps
F)tibialis anterior
G)biceps brachii
H)trapezius

Question 2

Muscles of the hand contain a high percentage of fast-twitch fibers, which allows for actions that are strong and quick.

Accepted Answer

A) True 
 B)False

Question 3

A protein that stores oxygen in slow-twitch muscle fibers is ________.

Accepted Answer

The answer of A protein that stores oxygen in slow-twitch...

Question 4

The swinging of a tennis racket is a brief, high-intensity activity that requires the contraction of ________ fibers.

Accepted Answer

The answer of The swinging of a tennis racket is...

Question 5

Intercalated discs

Accepted Answer

A)  are characteristic of smooth muscle cells. 
B)  contain gap junctions that allow the signal to spread quickly through cardiac muscle cells. 
C)  support fast-twitch fibers of skeletal muscle. 
D)  stimulate pacemaker cells in cardiac muscle. 
E)  stimulate the contraction of skeletal muscle. 
A)  are characteristic of smooth muscle cells. 
B)  contain gap junctions that allow the signal to spread quickly through cardiac muscle cells. 
C)  support fast-twitch fibers of skeletal muscle. 
D)  stimulate pacemaker cells in cardiac muscle. 
E)  stimulate the contraction of skeletal muscle.

Question 6

We are unable to exert any conscious control over the contraction of smooth or cardiac muscle. These muscles are referred to as ________ muscle.

Accepted Answer

The answer of We are unable to exert any conscious...

Question 7

If your goal was to become an endurance athlete, what type of training should you select, and why, to increase performance?

Accepted Answer

An endurance athlete depends on muscle e

Question 8

A myogram is a recording of

Accepted Answer

A)  the electrical activity of muscle cells. 
B)  the electrical activity of nerves at neuromuscular junctions. 
C)  the activity of muscle cells. 
D)  blood pressure changes resulting from muscle contraction. 
E)  the movement of myosin filaments. 
A)  the electrical activity of muscle cells. 
B)  the electrical activity of nerves at neuromuscular junctions. 
C)  the activity of muscle cells. 
D)  blood pressure changes resulting from muscle contraction. 
E)  the movement of myosin filaments.

Question 9

The most common reason for muscle fatigue is the lack of enough ________ to meet the metabolic demands placed on the muscle.

Accepted Answer

The answer of The most common reason for muscle fatigue...

Question 10

As part of your fitness training, you do biceps curls lifting two 10-lb weights. The muscle contractions enabling these movements are

Accepted Answer

A)  isometric contractions. 
B)  tetanic contractions. 
C)  isotonic contractions. 
D)  tendon-mediated contractions. 
E)  ligament-mediated contractions. 
A)  isometric contractions. 
B)  tetanic contractions. 
C)  isotonic contractions. 
D)  tendon-mediated contractions. 
E)  ligament-mediated contractions.

Question 11

Cardiac muscle differs from skeletal muscle in that

Accepted Answer

A)  all cardiac muscle is under involuntary control. 
B)  cardiac muscle is capable of relaxation. 
C)  cardiac muscle contracts in response to an electrical or chemical signal. 
D)  cardiac muscle is excitable and can shorten. 
E)  cardiac muscle gets longer rather than shorter when excited. 
A)  all cardiac muscle is under involuntary control. 
B)  cardiac muscle is capable of relaxation. 
C)  cardiac muscle contracts in response to an electrical or chemical signal. 
D)  cardiac muscle is excitable and can shorten. 
E)  cardiac muscle gets longer rather than shorter when excited.

Question 12

In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a muscle cell?

Accepted Answer

A)  the plasma membrane and the sarcoplasmic reticulum 
B)  troponin and tropomyosin 
C)  calcium and tropomyosin 
D)  acetylcholine and muscle cell receptors 
E)  actin and myosin 
A)  the plasma membrane and the sarcoplasmic reticulum 
B)  troponin and tropomyosin 
C)  calcium and tropomyosin 
D)  acetylcholine and muscle cell receptors 
E)  actin and myosin

Question 13

Since contraction of the hamstrings causes the knee to bend and contraction of the quadriceps causes the knee to extend, these muscles are said to be ________.

Accepted Answer

The answer of Since contraction of the hamstrings causes the...

Question 14

Match the following.
-Sarcomere lengthens as calcium is returned to sarcoplasmic reticulum, and the troponin-tropomyosin complex attaches to myosin binding sites on actin.

Accepted Answer

A) relaxation 
B) fast-twitch fibers 
C) twitch 
D) fatigue 
E) intercalated discs
F)latent period
G)slow-twitch fibers
H)recruitment
I)contraction 
A) relaxation 
B) fast-twitch fibers 
C) twitch 
D) fatigue 
E) intercalated discs
F)latent period
G)slow-twitch fibers
H)recruitment
I)contraction

Question 15

Using the figure above, identify the parts of the sarcomere.
-Label C represents a(n) ________.

Accepted Answer

A) actin filament 
B) myosin filament 
C) Z-line 
D) sarcomere 
A) actin filament 
B) myosin filament 
C) Z-line 
D) sarcomere

Question 16

Unlike skeletal muscle, cardiac and smooth muscle do not respond at all to the nervous system, but contract on their own. Differences in the rate of contraction of smooth and cardiac muscle are due to the action of pacemakers in cardiac muscles.

Accepted Answer

A) True 
 B)False

Question 17

Following running for a long distance, the muscle soreness that occurs the next day is due to chemicals released to repair damaged muscles.

Accepted Answer

A) True 
 B)False

Question 18

Match the following.
-decline in muscle activity as ATP levels decrease

Accepted Answer

A) relaxation 
B) fast-twitch fibers 
C) twitch 
D) fatigue 
E) intercalated discs
F)latent period
G)slow-twitch fibers
H)recruitment
I)contraction 
A) relaxation 
B) fast-twitch fibers 
C) twitch 
D) fatigue 
E) intercalated discs
F)latent period
G)slow-twitch fibers
H)recruitment
I)contraction

Question 19

Tetanus results from a state of maximum muscle relaxation, which is necessary to allow the muscle to rest before the next contraction.

Accepted Answer

A) True 
 B)False

Question 20

All of the following are necessary for contraction to occur EXCEPT which one?

Accepted Answer

A)  Calcium levels must increase in close proximity to the contractile proteins. 
B)  ATP must be present. 
C)  Troponin-tropomyosin complex must shift out of the way. 
D)  Cross-bridges must form between actin and myosin. 
E)  The troponin and tropomysin must slide relative to each other, shortening the sarcomere. 
A)  Calcium levels must increase in close proximity to the contractile proteins. 
B)  ATP must be present. 
C)  Troponin-tropomyosin complex must shift out of the way. 
D)  Cross-bridges must form between actin and myosin. 
E)  The troponin and tropomysin must slide relative to each other, shortening the sarcomere.

Exam 6: The Muscular System

Match the following muscles to their function. -bends forearm at elbow

Muscles of the hand contain a high percentage of fast-twitch fibers, which allows for actions that are strong and quick.

A protein that stores oxygen in slow-twitch muscle fibers is ________.

The swinging of a tennis racket is a brief, high-intensity activity that requires the contraction of ________ fibers.

Intercalated discs

We are unable to exert any conscious control over the contraction of smooth or cardiac muscle. These muscles are referred to as ________ muscle.

If your goal was to become an endurance athlete, what type of training should you select, and why, to increase performance?

A myogram is a recording of

The most common reason for muscle fatigue is the lack of enough ________ to meet the metabolic demands placed on the muscle.

As part of your fitness training, you do biceps curls lifting two 10-lb weights. The muscle contractions enabling these movements are

Cardiac muscle differs from skeletal muscle in that

In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a muscle cell?

Since contraction of the hamstrings causes the knee to bend and contraction of the quadriceps causes the knee to extend, these muscles are said to be ________.

Match the following. -Sarcomere lengthens as calcium is returned to sarcoplasmic reticulum, and the troponin-tropomyosin complex attaches to myosin binding sites on actin.

Using the figure above, identify the parts of the sarcomere. -Label C represents a(n) ________.

Unlike skeletal muscle, cardiac and smooth muscle do not respond at all to the nervous system, but contract on their own. Differences in the rate of contraction of smooth and cardiac muscle are due to the action of pacemakers in cardiac muscles.

Following running for a long distance, the muscle soreness that occurs the next day is due to chemicals released to repair damaged muscles.

Match the following. -decline in muscle activity as ATP levels decrease

Tetanus results from a state of maximum muscle relaxation, which is necessary to allow the muscle to rest before the next contraction.

All of the following are necessary for contraction to occur EXCEPT which one?

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