Question 1

Figure 10-1 Skeletal Muscle Fiber
Use Figure 10-1 to answer the following questions:
-What physiological process occurs in the structure labeled "7"?

Accepted Answer

A)  release of neurotransmitter
B)  conduction of the action potential into the cell interior
C)  activity of acetylcholinesterase
D)  release of protein and calcium ions into the muscle fiber
E)  opening of sodium channels and subsequent influx of sodiumF) A) and B)
G) A) and C)

Question 2

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

Accepted Answer

A)  Z line.
B)  M line.
C)  H band.
D)  A band.
E)  I band.F) None of the above
G) B) and D)

Question 3

Synaptic vesicles contain neurotransmitters that are released by ________ when the action potential arrives.

Accepted Answer

A)  endocytosis
B)  apoptosis
C)  exocytosis
D)  hydrolysis
E)  sodiumF) A) and E)
G) A) and D)

Question 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

A)  integumentary
B)  respiratory
C)  cardiovascular
D)  urinary
E)  endocrineF) A) and C)
G) All of the above

Question 6

A(n) ________ can be described as a broad tendinous sheet.

Accepted Answer

A)  fasciae
B)  retinaculum
C)  aponeurosis
D)  interstitium
E)  tympanumF) A) and C)
G) A) and D) C

Question 7

The complex of a transverse tubule and two adjacent terminal cisternae is known as a

Accepted Answer

A)  trimer.
B)  triad.
C)  triptych.
D)  trisome.
E)  trilogy.F) B) and C)
G) C) and D)

Question 8

Skeletal muscle fibers are formed from embryonic cells called

Accepted Answer

A)  sarcomeres.
B)  myofibrils.
C)  myoblasts.
D)  fascicles.
E)  myomeres.F) A) and E)
G) C) and D)

Question 9

In rigor mortis

Accepted Answer

A)  the myosin heads are attached to actin.
B)  ATP is depleted.
C)  calcium ions keep binding to troponin.
D)  sustained contractions occur.
E)  All of the answers are correct.F) A) and B)
G) A) and C)

Question 10

The cytoplasm of the neuromuscular terminal contains vesicles filled with molecules of the neurotransmitter

Accepted Answer

A)  epinephrine.
B)  norepinephrine.
C)  acetylcholine.
D)  antidiuretic hormone.
E)  adrenaline.F) All of the above
G) A) and D)

Question 11

How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?

Accepted Answer

A)  It would make the muscles less excitable.
B)  It would produce muscle weakness.
C)  It would cause muscles to stay contracted.
D)  It would cause muscles to stay relaxed.
E)  It would have little effect on skeletal muscles.F) B) and E)
G) B) and C) C

Question 12

Active sites on the actin become available for binding after

Accepted Answer

A)  actin binds to troponin.
B)  troponin binds to tropomyosin.
C)  calcium binds to troponin.
D)  calcium binds to tropomyosin.
E)  myosin binds to troponin.F) C) and D)
G) B) and D)

Question 13

Stem cells located between the endomysium and sarcolemma that function in the repair of damaged muscle tissue are called

Accepted Answer

A)  myocytes.
B)  satellite cells.
C)  endocytes.
D)  sarcocytes.
E)  creatinocytes.F) A) and D)
G) A) and E)

Question 14

The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)

Accepted Answer

A)  fascicle.
B)  tendon.
C)  ligament.
D)  epimysium.
E)  myofibril.F) A) and B)
G) A) and C)

Question 15

Fast muscle fibers can adapt to aerobic metabolism by generating more mitochondria in response to

Accepted Answer

A)  repeated,exhaustive stimulation.
B)  sustained low levels of muscle activity.
C)  high amounts of oxygen.
D)  increased levels of testosterone.
E)  prolonged periods of inactivity.F) D) and E)
G) B) and D)

Question 16

An infection by the bacterium Clostridium tetani can cause the disease called

Accepted Answer

A)  cholera.
B)  polio.
C)  botulism.
D)  tetanus.
E)  muscular dystrophy.F) A) and D)
G) A) and E)

Question 17

The sequence of processes that links the action potential to contraction is called

Accepted Answer

A)  neuromuscular junction.
B)  action potential propagation.
C)  excitation-contraction coupling.
D)  cross bridge formation.
E)  sliding filament theory.F) A) and D)
G) A) and E)

Question 18

A single contraction-relaxation cycle in a muscle fiber produces a(n)

Accepted Answer

A)  cramp.
B)  twitch.
C)  tetanic contraction.
D)  action potential.
E)  motor unit.F) C) and D)
G) B) and E) B

Question 19

Figure 10-1 Skeletal Muscle Fiber
Use Figure 10-1 to answer the following questions:
-What is released from the structure labeled "9"?

Accepted Answer

A)  sarcoplasm
B)  acetylcholine
C)  protein
D)  calcium ions
E)  acetylcholinesteraseF) A) and D)
G) A) and E)

Question 20

When acetylcholine binds to receptors at the motor end plate,the sarcolemma becomes

Accepted Answer

A)  more permeable to sodium ions.
B)  less permeable to sodium ions.
C)  more permeable to calcium ions.
D)  less permeable to potassium ions.
E)  less permeable to potassium and sodium ions.F) None of the above
G) D) and E)

Exam 10: Muscle Tissue

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following questions: -What physiological process occurs in the structure labeled "7"?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Synaptic vesicles contain neurotransmitters that are released by ________ when the action potential arrives.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A(n) ________ can be described as a broad tendinous sheet.

Correct AnswerverifiedC

The complex of a transverse tubule and two adjacent terminal cisternae is known as a

Correct AnswerverifiedShow Answer

Skeletal muscle fibers are formed from embryonic cells called

Correct AnswerverifiedShow Answer

In rigor mortis

Correct AnswerverifiedShow Answer

The cytoplasm of the neuromuscular terminal contains vesicles filled with molecules of the neurotransmitter

Correct AnswerverifiedShow Answer

How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?

Correct AnswerverifiedC

Active sites on the actin become available for binding after

Correct AnswerverifiedShow Answer

Stem cells located between the endomysium and sarcolemma that function in the repair of damaged muscle tissue are called

Correct AnswerverifiedShow Answer

The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)

Correct AnswerverifiedShow Answer

Fast muscle fibers can adapt to aerobic metabolism by generating more mitochondria in response to

Correct AnswerverifiedShow Answer

An infection by the bacterium Clostridium tetani can cause the disease called

Correct AnswerverifiedShow Answer

The sequence of processes that links the action potential to contraction is called

Correct AnswerverifiedShow Answer

A single contraction-relaxation cycle in a muscle fiber produces a(n)

Correct AnswerverifiedB

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following questions: -What is released from the structure labeled "9"?

Correct AnswerverifiedShow Answer

When acetylcholine binds to receptors at the motor end plate,the sarcolemma becomes

Correct AnswerverifiedShow Answer

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C

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C

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B

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