Question 1

A myofilament that runs throught the core of a thick filament and anchors it to a Z disc is called a(n) __________.

Accepted Answer

A)   myofibril
B)   thin filament
C)   T tubule
D)   sarcolemma
E)   elastic filamentF) C) and D)
G) B) and C)

Question 2

When a skeletal muscle lengthens,its __________ helps resist excessive stretching and subsequent injury to the muscle.

Accepted Answer

A)   thick filaments
B)   collagen
C)   actin
D)   troponin-tropomyosin complex
E)   varicositiesF) A) and E)
G) A) and D)

Question 3

Which of the following is an accurate comparison of skeletal muscle to smooth muscle?

Accepted Answer

A)   Smooth muscle contracts more slowly but relaxes more rapidly.
B)   Smooth muscle contracts more rapidly but relaxes more slowly.
C)   Smooth muscle contracts and relaxes more slowly.
D)   Smooth muscle consumes more ATP to maintain a given level of muscle tension.
E)   Smooth muscle depends on a nerve fiber to supply the calcium needed for contraction.F) B) and D)
G) C) and D)

Question 4

Which of the following is predominately made up of myosin?

Accepted Answer

A)   G actin
B)   F actin
C)   The thin filament
D)   The thick filament
E)   The elastic filamentF) A) and D)
G) B) and C)

Question 5

An isometric contraction does not change muscle length.

Accepted Answer

A) True 
 B)False

Question 6

The sliding filament theory of muscle contraction has emerged from research only in the last 10 to 15 years.

Accepted Answer

A) True 
 B)False

Question 7

A skeletal muscle generates the greatest tension when it is __________.

Accepted Answer

A)   greatly stretched before being stimulated
B)   partially stretched before being stimulated
C)   fully relaxed before being stimulated
D)   well-rested and low in creatine phosphate
E)   high in lactate concentrationF) B) and C)
G) B) and E)

Question 8

All muscle types will respond to an electrical stimulus because all muscle cells are _________.

Accepted Answer

A)   excitable
B)   contractile
C)   striated
D)   involuntary
E)   isometricF) A) and D)
G) A) and C)

Question 9

A muscle twitch produces external tension and moves an object by shortening the muscles during the _____ phase.

Accepted Answer

A)   contraction
B)   latent
C)   twitch
D)   relaxation
E)   reloadF) B) and E)
G) B) and C)

Question 10

Shortening a muscle while it maintains constant tension is called __________.

Accepted Answer

A)   complete tetanus
B)   incomplete tetanus
C)   an isokinetic contraction
D)   an isometric contraction
E)   an isotonic contractionF) A) and B)
G) A) and E)

Question 11

The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following individuals would have more mitochondria in her skeletal muscle?

Accepted Answer

A)   A 50-year-old sedentary computer programmer
B)   A 22-year-old soccer player
C)   A long-term hospice patient
D)   A model on a reduced-calorie diet
E)   A newbornF) B) and C)
G) B) and E)

Question 13

What happens when acetylcholine stimulates its receptors in the neuromuscular junction?

Accepted Answer

A)   The release of Ca2+ from the sarcoplasmic reticulum decreases.
B)   The permeability of the sarcolemma to Na+ increases.
C)   The positive charge on the sarcolemma decreases.
D)   The threshold of the muscle fiber lowers.
E)   The inhibitory effect of acetylcholinesterase is overridden.F) None of the above
G) C) and E)

Question 14

The protein that acts as a calcium receptor in skeletal muscle is __________.

Accepted Answer

A)   F actin
B)   tropomyosin
C)   troponin
D)   titin
E)   dystrophinF) A) and B)
G) B) and D)

Question 15

Which of the following contains overlapping thick and thin filaments?

Accepted Answer

A)   A band
B)   H band
C)   I band
D)   M line
E)   Z discsF) B) and E)
G) All of the above

Question 16

Which muscle(s) can contract without the need for nervous stimulation?

Accepted Answer

A)   Skeletal muscle only
B)   Smooth muscle only
C)   Cardiac muscle only
D)   Smooth and cardiac muscle
E)   Skeletal,smooth and cardiac muscleF) A) and B)
G) None of the above

Question 17

In order for muscle to continue contracting during anaerobic fermentation,which of the following is essential?

Accepted Answer

A)   Cholinesterase inhibitors
B)   Protease
C)   Myokinase
D)   Acetylcholinesterase
E)   Acid phosphataseF) None of the above
G) C) and D)

Question 18

Which of the following is a property of collagen?

Accepted Answer

A)   Contractility
B)   Excitability
C)   Elasticity
D)   Expendability
E)   ImpermeabilityF) None of the above
G) B) and E)

Question 19

Resistance exercise will most likely cause muscle to __________.

Accepted Answer

A)   myopathy
B)   dystrophy
C)   apathy
D)   atrophy
E)   hypertrophyF) All of the above
G) C) and D)

Question 20

Where is dystrophin,the protein that is defective in muscular dystrophy,normally found?

Accepted Answer

A)   Between the outermost myofilaments and the sarcolemma of a muscle fiber
B)   As a transmembrane protein of the sarcolemma
C)   In the Z discs of skeletal and cardiac muscle
D)   In the dense bodies of smooth muscle
E)   Bridging the gap between the sarcolemma and axon terminalF) C) and D)
G) B) and E)

Exam 11: Muscular Tissue

Resistance exercise will most likely cause muscle to __________.

Correct AnswerverifiedShow Answer

Which of the following is a property of collagen?

Correct AnswerverifiedShow Answer

Which of the following is predominately made up of myosin?

Correct AnswerverifiedShow Answer

A muscle twitch produces external tension and moves an object by shortening the muscles during the _____ phase.

Correct AnswerverifiedShow Answer

Where is dystrophin,the protein that is defective in muscular dystrophy,normally found?

Correct AnswerverifiedShow Answer

Shortening a muscle while it maintains constant tension is called __________.

Correct AnswerverifiedShow Answer

Which muscle(s) can contract without the need for nervous stimulation?

Correct AnswerverifiedShow Answer

Which of the following individuals would have more mitochondria in her skeletal muscle?

Correct AnswerverifiedShow Answer

All muscle types will respond to an electrical stimulus because all muscle cells are _________.

Correct AnswerverifiedShow Answer

Which of the following is an accurate comparison of skeletal muscle to smooth muscle?

Correct AnswerverifiedShow Answer

Which of the following contains overlapping thick and thin filaments?

Correct AnswerverifiedShow Answer

What happens when acetylcholine stimulates its receptors in the neuromuscular junction?

Correct AnswerverifiedShow Answer

A skeletal muscle generates the greatest tension when it is __________.

Correct AnswerverifiedShow Answer

In order for muscle to continue contracting during anaerobic fermentation,which of the following is essential?

Correct AnswerverifiedShow Answer

The sliding filament theory of muscle contraction has emerged from research only in the last 10 to 15 years.

Correct AnswerverifiedShow Answer

An isometric contraction does not change muscle length.

Correct AnswerverifiedShow Answer

When a skeletal muscle lengthens,its __________ helps resist excessive stretching and subsequent injury to the muscle.

Correct AnswerverifiedShow Answer

The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber.

Correct AnswerverifiedShow Answer

A myofilament that runs throught the core of a thick filament and anchors it to a Z disc is called a(n) __________.

Correct AnswerverifiedShow Answer

The protein that acts as a calcium receptor in skeletal muscle is __________.

Correct AnswerverifiedShow Answer

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