Question 1

The type of contraction in which the muscle fibers do not shorten is called

Accepted Answer

A)   tetany.
B)   concentric.
C)   isometric.
D)   isotonic.
E)   treppe.F) A) and C)
G) B) and E)

Question 2

The region of the sarcomere containing the thick filaments is the

Accepted Answer

A)   H band.
B)   Z line.
C)   A band.
D)   I band.
E)   M line.F) C) and E)
G) B) and C)

Question 3

The region of the sarcomere that always contains thin filaments is the

Accepted Answer

A)   M line.
B)   I band.
C)   H band.
D)   A band.
E)   Z line.F) A) and B)
G) B) and C) B

Question 4

Since each myofibril is attached at either end of the muscle fiber, when sarcomeres shorten, the muscle fiber

Accepted Answer

A)   shortens.
B)   weakens.
C)   lengthens.
D)   strengthens.
E)   not enough information to sayF) B) and E)
G) A) and B) A

Question 5

Which of the following is not a function of smooth muscle tissue?

Accepted Answer

A)   forcing blood from the heart into the major arteries
B)   altering the diameter of the respiratory passageways
C)   moving food materials along the digestive tract
D)   elevating hairs on the arm
E)   forcing urine out of the urinary tractF) B) and C)
G) All of the above

Question 6

Which of the following muscles would contract more forcefully?

Accepted Answer

A)   a muscle receiving 20 to 25 action potentials per second
B)   a muscle receiving 10 to 15 action potentials per secondC) A) and B)
D) undefined

Question 7

Figure 9- 2 Muscle Contractions
Use Figure 9- 2 to answer the following questions:
-Heat energy produced from muscle contraction is released by the _____system.

Accepted Answer

A)   integumentary
B)   urinary
C)   cardiovascular
D)   respiratory
E)   all of the aboveF) B) and E)
G) D) and E)

Question 8

The structural theory that explains how a muscle fiber contracts is called the_________
.

Accepted Answer

sliding fi...

Question 9

The action potential is conducted into a skeletal muscle fiber by

Accepted Answer

A)   triads.
B)   sarcoplasmic reticulum.
C)   transverse tubules.
D)   motor end plates.
E)   neuromuscular junctions.F) A) and E)
G) B) and C)

Question 10

A muscle produces its highest tension when in complete__________

Accepted Answer

tetanus

Question 11

Figure 9- 1 Skeletal Muscle Fiber
Use Figure 9- 1 to answer the following questions:
-Receptors for acetylcholine are located on the

Accepted Answer

A)   sarcomere.
B)   synaptic cleft.
C)   transverse tubule.
D)   motor end plate.
E)   synaptic knob.F) C) and D)
G) A) and B)

Question 12

Which of the following best describes the term sarcomere?

Accepted Answer

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

Question 13

An infection by the bacterium Clostridium tetani can cause the disease called_________
.

Accepted Answer

The answer of An infection by the bacterium Clostridium tetani...

Question 14

A single contraction- relaxation cycle in a muscle fiber produces a_______________

Accepted Answer

The answer of A single contraction- relaxation cycle in a...

Question 15

Figure 9- 1 Skeletal Muscle Fiber
Use Figure 9- 1 to answer the following questions:
-How would an elevated level of thyroid hormone in the body affect skeletal muscles?

Accepted Answer

A)   It would decrease heat production by muscle tissue.
B)   It would cause an increase in muscle mass.
C)   It would stimulate energy use and heat production.
D)   It would stimulate hypertrophy.
E)   It would stimulate atrophy.F) A) and C)
G) A) and D)

Question 16

A resting muscle generates most of its ATP by

Accepted Answer

A)   hydrolysis of creatine phosphate.
B)   aerobic metabolism of fatty acids.
C)   anaerobic respiration.
D)   the tricarboxylic acid cycle.
E)   glycogenolysis.F) B) and D)
G) C) and D)

Question 17

During the Cori cycle, in the liver

Accepted Answer

A)   lactic acid is shuffled to muscle cells.
B)   glucose is produced from lactic acid.
C)   glucose is released from glycogen.
D)   lactic acid is produced from pyruvic acid.
E)   lactic acid is produced from glucose.F) A) and C)
G) B) and E)

Question 18

Communication between axons and muscle fibers occurs at specialized synapses called__________
.

Accepted Answer

neuromuscu...

Question 19

When contraction occurs,

Accepted Answer

A)   the width of the A band remains constant.
B)   the I bands get smaller.
C)   the H bands get smaller.
D)   the Z lines move closer together.
E)   all of the aboveF) C) and E)
G) D) and E)

Question 20

At rest, active sites on the actin are blocked by

Accepted Answer

A)   myosin molecules.
B)   tropomyosin molecules.
C)   troponin molecules.
D)   ATP molecules.
E)   calcium ions.F) A) and B)
G) A) and C)

Exam 9: Muscle Tissue

The type of contraction in which the muscle fibers do not shorten is called

Correct AnswerverifiedShow Answer

The region of the sarcomere containing the thick filaments is the

Correct AnswerverifiedShow Answer

The region of the sarcomere that always contains thin filaments is the

Correct AnswerverifiedB

Since each myofibril is attached at either end of the muscle fiber, when sarcomeres shorten, the muscle fiber

Correct AnswerverifiedA

Which of the following is not a function of smooth muscle tissue?

Correct AnswerverifiedShow Answer

Which of the following muscles would contract more forcefully?

Correct AnswerverifiedShow Answer

Figure 9- 2 Muscle Contractions Use Figure 9- 2 to answer the following questions: -Heat energy produced from muscle contraction is released by the _____system.

Correct AnswerverifiedShow Answer

The structural theory that explains how a muscle fiber contracts is called the_________ .

Correct Answerverifiedsliding fi...View AnswerShow Answer

The action potential is conducted into a skeletal muscle fiber by

Correct AnswerverifiedShow Answer

A muscle produces its highest tension when in complete__________

Correct Answerverifiedtetanus

Figure 9- 1 Skeletal Muscle Fiber Use Figure 9- 1 to answer the following questions: -Receptors for acetylcholine are located on the

Correct AnswerverifiedShow Answer

Which of the following best describes the term sarcomere?

Correct AnswerverifiedShow Answer

An infection by the bacterium Clostridium tetani can cause the disease called_________ .

Correct AnswerverifiedShow Answer

A single contraction- relaxation cycle in a muscle fiber produces a_______________

Correct AnswerverifiedShow Answer

Figure 9- 1 Skeletal Muscle Fiber Use Figure 9- 1 to answer the following questions: -How would an elevated level of thyroid hormone in the body affect skeletal muscles?

Correct AnswerverifiedShow Answer

A resting muscle generates most of its ATP by

Correct AnswerverifiedShow Answer

During the Cori cycle, in the liver

Correct AnswerverifiedShow Answer

Communication between axons and muscle fibers occurs at specialized synapses called__________ .

Correct Answerverifiedneuromuscu...View AnswerShow Answer

When contraction occurs,

Correct AnswerverifiedShow Answer

At rest, active sites on the actin are blocked by

Correct AnswerverifiedShow Answer

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B

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A

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sliding fi...
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tetanus

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neuromuscu...
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