Question 1

Individual muscle cells are surrounded by

Accepted Answer

A)   endomysium.
B)   perimysium.
C)   sarcolemma.
D)   sarcomere.
E)   myofibrils.

Question 2

Which of the following is a recognized function of skeletal muscle?

Accepted Answer

A)   produce movement
B)   maintain posture
C)   maintain body temperature
D)   guard body entrances and exits
E)   all of the above

Question 3

Physical evidence that supports the sliding filament theory of muscle contraction includes

Accepted Answer

A)   constant distance between Z lines during contraction.
B)   decreased width of the H band during contraction.
C)   increased width of the I band during contraction.
D)   decreased width of the A band during contraction.
E)   the I band and H band distance is constant during contraction.

Question 4

When comparing slow motor units to fast motor units, slow units

Accepted Answer

A)   take about three times as long to reach peak tension.
B)   have much smaller fiber diameters.
C)   generate much less tension.
D)   are rich in the red protein myoglobin.
E)   all of the above

Question 5

The types of muscle tissue include all of the following, except

Accepted Answer

A)   striated muscle.
B)   cardiac muscle.
C)   smooth muscle.
D)   skeletal muscle.
E)   none of the above

Question 6

Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the

Accepted Answer

A)   endomysium.
B)   perimysium.
C)   sarcolemma.
D)   sarcomere.
E)   myofibrils.

Question 7

In an isotonic contraction,

Accepted Answer

A)   muscle tension exceeds the load and the muscle lifts the load.
B)   tension rises and falls but the muscle length is constant.
C)   the peak tension is less than the load.
D)   many twitches fuse into one.
E)   flexion is produced.

Question 8

In response to action potentials arriving along the transverse tubules, the sarcoplasmic reticulum releases

Accepted Answer

A)   acetylcholine.
B)   sodium ions.
C)   potassium ions.
D)   calcium ions.
E)   hydrogen ions.

Question 9

Heat energy produced from muscle contraction is released by the ________ system.

Accepted Answer

A)   integumentary
B)   respiratory
C)   cardiovascular
D)   urinary
E)   all of the above

Question 10

The rapid rise and fall in force produced by a muscle fiber after a single action potential is

Accepted Answer

A)   a tetanus.
B)   an unfused tetanus.
C)   a twitch.
D)   an end plate potential.
E)   a muscle action potential.

Question 11

Which of these would lead to increased oxygen consumption?

Accepted Answer

A)   increased heat production
B)   increased conversion of lactic acid to glucose
C)   increased aerobic respiration by muscle cells
D)   increased muscle activity
E)   all of the above

Question 12

Which of the following best describes the term titin?

Accepted Answer

A)   protein that accounts for elasticity of resting muscle
B)   repeating unit of striated myofibrils
C)   storage site for calcium ions
D)   where thin filaments are anchored
E)   largely made of myosin molecules

Question 13

Figure 9-2 Muscle Contractions
Use Figure 9-2 to answer the following questions:
-What is the contraction in graph (d)  called?

Accepted Answer

A)   complete tetanus
B)   incomplete tetanus
C)   twitch
D)   wave summation
E)   treppe

Question 14

How would a drug that blocks acetylcholine receptors at the motor end plate affect skeletal muscle?

Accepted Answer

A)   It would make the muscles more excitable.
B)   It would produce uncontrolled muscle spasms.
C)   It would cause spastic paralysis (muscles are contracted and unable to relax) .
D)   It would cause flaccid paralysis (muscles are relaxed and unable to contract) .
E)   It would have little effect on skeletal muscles.

Question 15

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Accepted Answer

A)   conduction.
B)   contraction.
C)   peristalsis.
D)   cushioning
E)   any of the above

Exam 9: Skeletal Muscle Tissue

Which of the following is a recognized function of skeletal muscle?

Correct Answer
verified

In an isotonic contraction,

Correct Answer
verified

Figure 9-2 Muscle Contractions Use Figure 9-2 to answer the following questions: -What is the contraction in graph (d) called?

Correct Answer
verified

How would a drug that blocks acetylcholine receptors at the motor end plate affect skeletal muscle?

Correct Answer
verified

Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the

Correct Answer
verified

The types of muscle tissue include all of the following, except

Correct Answer
verified

Heat energy produced from muscle contraction is released by the ________ system.

Correct Answer
verified

Which of the following best describes the term titin?

Correct Answer
verified

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Correct Answer
verified

Individual muscle cells are surrounded by

Correct Answer
verified

When comparing slow motor units to fast motor units, slow units

Correct Answer
verified

The rapid rise and fall in force produced by a muscle fiber after a single action potential is

Correct Answer
verified

Physical evidence that supports the sliding filament theory of muscle contraction includes

Correct Answer
verified

Which of these would lead to increased oxygen consumption?

Correct Answer
verified

In response to action potentials arriving along the transverse tubules, the sarcoplasmic reticulum releases

Correct Answer
verified

Exam 9: Skeletal Muscle Tissue

Which of the following is a recognized function of skeletal muscle?

Correct AnswerverifiedShow Answer

In an isotonic contraction,

Correct AnswerverifiedShow Answer

Figure 9-2 Muscle Contractions Use Figure 9-2 to answer the following questions: -What is the contraction in graph (d) called?

Correct AnswerverifiedShow Answer

How would a drug that blocks acetylcholine receptors at the motor end plate affect skeletal muscle?

Correct AnswerverifiedShow Answer

Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the

Correct AnswerverifiedShow Answer

The types of muscle tissue include all of the following, except

Correct AnswerverifiedShow Answer

Heat energy produced from muscle contraction is released by the ________ system.

Correct AnswerverifiedShow Answer

Which of the following best describes the term titin?

Correct AnswerverifiedShow Answer

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Correct AnswerverifiedShow Answer

Individual muscle cells are surrounded by

Correct AnswerverifiedShow Answer

When comparing slow motor units to fast motor units, slow units

Correct AnswerverifiedShow Answer

The rapid rise and fall in force produced by a muscle fiber after a single action potential is

Correct AnswerverifiedShow Answer

Physical evidence that supports the sliding filament theory of muscle contraction includes

Correct AnswerverifiedShow Answer

Which of these would lead to increased oxygen consumption?

Correct AnswerverifiedShow Answer

In response to action potentials arriving along the transverse tubules, the sarcoplasmic reticulum releases

Correct AnswerverifiedShow Answer

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