Question 1

Figure 10-1 Skeletal Muscle Fiber
  
Use Figure 10-1 to answer the following questions:
-Which structure has pumps to remove calcium ions from the sarcoplasm to produce relaxation?

Accepted Answer

A)  6 
B)  7 
C)  1 
D)  3 
E)  2 
A)  6 
B)  7 
C)  1 
D)  3 
E)  2

Question 2

Which of the following is not true of acetylcholine?

Accepted Answer

A)  It binds to receptor membrane channels. 
B)  It diffuses across the synaptic cleft. 
C)  It is stored in the neuron in vesicles. 
D)  It enters the muscle fiber to release calcium form the sarcoplasmic reticulum. 
E)  It is digested by acetylcholinesterase. 
A)  It binds to receptor membrane channels. 
B)  It diffuses across the synaptic cleft. 
C)  It is stored in the neuron in vesicles. 
D)  It enters the muscle fiber to release calcium form the sarcoplasmic reticulum. 
E)  It is digested by acetylcholinesterase.

Question 3

Which of the following become connected by myosin cross-bridges during muscle contraction?

Accepted Answer

A)  thin filaments and thick filaments 
B)  thick filaments and titin filaments 
C)  z disks and actin filaments 
D)  thick filaments and t-tubules 
E)  thin filaments and t-tubules 
A)  thin filaments and thick filaments 
B)  thick filaments and titin filaments 
C)  z disks and actin filaments 
D)  thick filaments and t-tubules 
E)  thin filaments and t-tubules

Question 4

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

Accepted Answer

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

Question 5

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

Question 6

In-Text Figure Based Questions
- Match the level of organizationwith the structure that surrounds it:Level of organization:skeletal muscle, muscle fascicle, muscle fiber, myofibrilSurrounding structure: endomysium,epimysium, perimysium, sarcoplasmic reticulum. (Figure 10-6)

Accepted Answer

A)  skeletal muscle—epimysium; muscle fascicle—perimysium; muscle fiber—endomysium;myofibril— sarcoplasmic reticulum 
B)  skeletal muscle—sarcoplasmic reticulum;muscle fascicle—epimysium; muscle fiber—perimysium; myofibril—endomysium 
C)  skeletal muscle—endomysium; muscle fascicle—epimysium; muscle fiber—perimysium;myofibril— sarcoplasmic reticulum 
D)  skeletal muscle—endomysium; muscle fascicle—perimysium; muscle fiber—sarcoplasmicreticulum; myofibril—epimysium 
E)  skeletal muscle—epimysium; muscle fascicle—endomysium; muscle fiber—perimysium;myofibril— sarcoplasmic reticulum 
A)  skeletal muscle—epimysium; muscle fascicle—perimysium; muscle fiber—endomysium;myofibril— sarcoplasmic reticulum 
B)  skeletal muscle—sarcoplasmic reticulum;muscle fascicle—epimysium; muscle fiber—perimysium; myofibril—endomysium 
C)  skeletal muscle—endomysium; muscle fascicle—epimysium; muscle fiber—perimysium;myofibril— sarcoplasmic reticulum 
D)  skeletal muscle—endomysium; muscle fascicle—perimysium; muscle fiber—sarcoplasmicreticulum; myofibril—epimysium 
E)  skeletal muscle—epimysium; muscle fascicle—endomysium; muscle fiber—perimysium;myofibril— sarcoplasmic reticulum

Question 7

If a second stimulus arrives before the relaxation phase has ended, a second, more powerful contractionoccurs. This addition of one twitch to another is called

Accepted Answer

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

Question 8

The point in a muscle twitch when the troponin is bound to calcium is called the

Accepted Answer

A)  contraction phase. 
B)  relaxation phase. 
C)  stimulus phase. 
D)  latent period. 
E)  isotonic period. 
A)  contraction phase. 
B)  relaxation phase. 
C)  stimulus phase. 
D)  latent period. 
E)  isotonic period.

Question 9

In the myofibril the protein that possesses the active site for myosin heads to bind is called

Accepted Answer

A)  titin. 
B)  actin. 
C)  G actin. 
D)  nebulin. 
E)  myosin. 
A)  titin. 
B)  actin. 
C)  G actin. 
D)  nebulin. 
E)  myosin.

Question 10

Thirty minutes after Mary has completed a 25-km race, she begins to notice severe muscle soreness and stiffness in her legs. Her urine is dark colored. She wonders whether she may have damaged her muscles during the race. She visits the ER, and the doctor orders several blood tests. What kind of blood tests can help determine whether muscle damage has occurred?

Accepted Answer

If muscle damage occurred, the doctor wo

Question 11

The most important factor in decreasing the intracellular concentration of calcium ion after contractionis

Accepted Answer

A)  active transport of calcium across the sarcolemma. 
B)  active transport of calcium into the sarcoplasmic reticulum. 
C)  active transport of calcium into the synaptic cleft. 
D)  diffusion of calcium out of the cell. 
E)  diffusion of calcium into the sarcoplasmic reticulum. 
A)  active transport of calcium across the sarcolemma. 
B)  active transport of calcium into the sarcoplasmic reticulum. 
C)  active transport of calcium into the synaptic cleft. 
D)  diffusion of calcium out of the cell. 
E)  diffusion of calcium into the sarcoplasmic reticulum.

Question 12

Put the following events of the neuromuscular junction in the order in which they occur.
1) Action potential is propagated in the sarcolemma.
2) Acetylcholine binds to ligand gated sodium channels.
3) Action potential arrives at the neuromuscular junction.
4) Vesicles full of acetylcholine are stored at the axon terminal.
5) Acetylcholine is released into the synaptic cleft.

Accepted Answer

A)  4,3,5,2,1 
B)  4,3,5,1,2 
C)  4,5,3,2,1 
D)  4,3,1,5,2 
E)  4,1,3,2,5 
A)  4,3,5,2,1 
B)  4,3,5,1,2 
C)  4,5,3,2,1 
D)  4,3,1,5,2 
E)  4,1,3,2,5

Question 13

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. 
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.

Question 14

Figure 10-1 Skeletal Muscle Fiber
  
Use Figure 10-1 to answer the following questions:
-Which of the following are found in the structure labeled "3"?

Accepted Answer

A)  actin 
B)  myosin 
C)  titin 
D)  tropomyosin 
E)  All of the answers are correct. 
A)  actin 
B)  myosin 
C)  titin 
D)  tropomyosin 
E)  All of the answers are correct.

Question 15

Communication between axons and muscle fibers occurs at specialized synapses called

Accepted Answer

A)  nervous units. 
B)  synaptic terminals. 
C)  motor end plates. 
D)  motor units. 
E)  neuromuscular junctions. 
A)  nervous units. 
B)  synaptic terminals. 
C)  motor end plates. 
D)  motor units. 
E)  neuromuscular junctions.

Question 16

Fast fibers

Accepted Answer

A)  have low resistance to fatigue. 
B)  rely on aerobic metabolism. 
C)  have many mitochondria. 
D)  have twitches with a very brief contraction phase. 
E)  have low resistance to fatigue and quick twitches. 
A)  have low resistance to fatigue. 
B)  rely on aerobic metabolism. 
C)  have many mitochondria. 
D)  have twitches with a very brief contraction phase. 
E)  have low resistance to fatigue and quick twitches.

Question 17

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

Question 18

Figure 10-1 Skeletal Muscle Fiber
  
Use Figure 10-1 to answer the following questions:
-Where would calcium ions be predominately found?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
E)  9 
A)  1 
B)  2 
C)  4 
D)  8 
E)  9

Question 19

Describe a motor unit. How many fibers does a motor unit contain?

Accepted Answer

A motor unit consists of all o

Question 20

In the sarcomere the protein that forms two twisted strands around a central rod-like protein is called

Accepted Answer

A)  titin. 
B)  actin. 
C)  G actin. 
D)  nebulin. 
E)  myosin. 
A)  titin. 
B)  actin. 
C)  G actin. 
D)  nebulin. 
E)  myosin.

Exam 10: Muscle Tissue

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following questions: -Which structure has pumps to remove calcium ions from the sarcoplasm to produce relaxation?

Which of the following is not true of acetylcholine?

Which of the following become connected by myosin cross-bridges during muscle contraction?

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

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

In-Text Figure Based Questions - Match the level of organizationwith the structure that surrounds it:Level of organization:skeletal muscle, muscle fascicle, muscle fiber, myofibrilSurrounding structure: endomysium,epimysium, perimysium, sarcoplasmic reticulum. (Figure 10-6)

If a second stimulus arrives before the relaxation phase has ended, a second, more powerful contractionoccurs. This addition of one twitch to another is called

The point in a muscle twitch when the troponin is bound to calcium is called the

In the myofibril the protein that possesses the active site for myosin heads to bind is called

The most important factor in decreasing the intracellular concentration of calcium ion after contractionis

Active sites on the actin become available for binding after

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following questions: -Which of the following are found in the structure labeled "3"?

Communication between axons and muscle fibers occurs at specialized synapses called

Fast fibers

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

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following questions: -Where would calcium ions be predominately found?

Describe a motor unit. How many fibers does a motor unit contain?

In the sarcomere the protein that forms two twisted strands around a central rod-like protein is called

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

The Muscular System

Nervous Tissue

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, Nutrition, and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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