Question 1

The thick filament is split by a Z disc.

Accepted Answer

A) True 
 B)False

Question 2

Shaking of limbs at rest that disappears during voluntary movement due to damage to the basal nuclei is called

Accepted Answer

A) choreA. 
B) resting tremor. 
C) intention tremor. 
D) spastic paralysis. 
A) choreA. 
B) resting tremor. 
C) intention tremor. 
D) spastic paralysis.

Question 3

Neurotransmitters are released at neuromuscular junctions to smooth muscle cells.

Accepted Answer

A) True 
 B)False

Question 4

In regards to the relationship between resting muscle fiber length and tension generated,

Accepted Answer

A) maximal tension is generated when the thick and thin filaments slightly overlap. 
B) maximal tension is generated when the thick and thin filaments do not overlap. 
C) maximal tension is generated when the thick and thin filaments greatly overlap. 
D) the amount of overlap is unimportant in determining maximal tension. 
A) maximal tension is generated when the thick and thin filaments slightly overlap. 
B) maximal tension is generated when the thick and thin filaments do not overlap. 
C) maximal tension is generated when the thick and thin filaments greatly overlap. 
D) the amount of overlap is unimportant in determining maximal tension.

Question 5

What structure runs the length of the sarcomere and contributes to the elastic recoil in muscle?

Accepted Answer

A) Z disk 
B) titin 
C) M line 
D) actin 
A) Z disk 
B) titin 
C) M line 
D) actin

Question 6

Duchenne's muscular dystrophy

Accepted Answer

A) is an X-linked recessive trait. 
B) most often affects women. 
C) involves degeneration of the smooth muscle dense bodies. 
D) All apply. 
A) is an X-linked recessive trait. 
B) most often affects women. 
C) involves degeneration of the smooth muscle dense bodies. 
D) All apply.

Question 7

Myostatin is

Accepted Answer

A) a paracrine regulator that inhibits satellite cell function and muscle growth. 
B) a paracrine regulator that stimulates satellite cell function and muscle growth. 
C) an autocrine regulator that inhibits satellite cell function and muscle growth. 
D) an autocrine regulator that stimulates satellite cell function and muscle growth. 
A) a paracrine regulator that inhibits satellite cell function and muscle growth. 
B) a paracrine regulator that stimulates satellite cell function and muscle growth. 
C) an autocrine regulator that inhibits satellite cell function and muscle growth. 
D) an autocrine regulator that stimulates satellite cell function and muscle growth.

Question 8

Endurance training results in increased

Accepted Answer

A) muscle mitochondria number. 
B) glycogen depletion during exercise. 
C) number of type IIX fibers. 
D) lactate production per unit time. 
A) muscle mitochondria number. 
B) glycogen depletion during exercise. 
C) number of type IIX fibers. 
D) lactate production per unit time.

Question 9

________ is characterized by continued attachment of myosin heads to actin filaments due to a lack of ATP.

Accepted Answer

A) Tetanus 
B) Rigor mortis 
C) Flaccid paralysis 
D) Treppe 
A) Tetanus 
B) Rigor mortis 
C) Flaccid paralysis 
D) Treppe

Question 10

The movement of the troponin-tropomyosin complex requires

Accepted Answer

A) ATP. 
B) Ca2+. 
C) acetylcholine. 
D) Na+. 
A) ATP. 
B) Ca2+. 
C) acetylcholine. 
D) Na+.

Question 11

Somatic motor neurons release the neurotransmitter _________ at the neuromuscular junction.

Accepted Answer

A) dopamine 
B) acetylcholine 
C) norepinephrine 
D) serotonin 
A) dopamine 
B) acetylcholine 
C) norepinephrine 
D) serotonin

Question 12

Longer,stronger muscles have motor units with very few fibers.

Accepted Answer

A) True 
 B)False

Question 13

The thick filament is also called the

Accepted Answer

A) A band. 
B) I band. 
C) H band. 
D) M line. 
A) A band. 
B) I band. 
C) H band. 
D) M line.

Question 14

Z discs are found bisecting the A bands.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following does NOT occur during the cross bridge cycle?

Accepted Answer

A) a second ATP binding causes cross bridges to release. 
B) ADP is released at the end of the power stroke. 
C) energized myosin heads bind troponin. 
D) ATP hydrolysis allows for cross bridge formation. 
A) a second ATP binding causes cross bridges to release. 
B) ADP is released at the end of the power stroke. 
C) energized myosin heads bind troponin. 
D) ATP hydrolysis allows for cross bridge formation.

Question 16

A force-velocity curve shows the _______ relationship between the force opposing muscle contraction and the velocity of muscle shortening.

Accepted Answer

A) direct 
B) inverse 
C) increased 
D) no 
A) direct 
B) inverse 
C) increased 
D) no

Question 17

ATP in muscle contraction is needed for

Accepted Answer

A) attachment of myosin cross bridges to actin. 
B) release of myosin cross bridges from actin. 
C) pumping of Ca2+ back into the sarcoplasmic reticulum. 
D) All apply. 
A) attachment of myosin cross bridges to actin. 
B) release of myosin cross bridges from actin. 
C) pumping of Ca2+ back into the sarcoplasmic reticulum. 
D) All apply.

Question 18

Flexors increase the angle at a joint.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is NOT true of slow oxidative/Type I red muscle fibers?

Accepted Answer

A) small diameter 
B) high resistance to fatigue 
C) high amount of myosin ATPase present 
D) slow twitch rate 
A) small diameter 
B) high resistance to fatigue 
C) high amount of myosin ATPase present 
D) slow twitch rate

Question 20

Regulation of motor neurons involves the actions of the basal nuclei and cerebellum.

Accepted Answer

A) True 
 B)False

The thick filament is split by a Z disc.

Shaking of limbs at rest that disappears during voluntary movement due to damage to the basal nuclei is called

Neurotransmitters are released at neuromuscular junctions to smooth muscle cells.

In regards to the relationship between resting muscle fiber length and tension generated,

What structure runs the length of the sarcomere and contributes to the elastic recoil in muscle?

Duchenne's muscular dystrophy

Myostatin is

Endurance training results in increased

________ is characterized by continued attachment of myosin heads to actin filaments due to a lack of ATP.

The movement of the troponin-tropomyosin complex requires

Somatic motor neurons release the neurotransmitter _________ at the neuromuscular junction.

Longer,stronger muscles have motor units with very few fibers.

The thick filament is also called the

Z discs are found bisecting the A bands.

Which of the following does NOT occur during the cross bridge cycle?

A force-velocity curve shows the _______ relationship between the force opposing muscle contraction and the velocity of muscle shortening.

ATP in muscle contraction is needed for

Flexors increase the angle at a joint.

Which of the following is NOT true of slow oxidative/Type I red muscle fibers?

Regulation of motor neurons involves the actions of the basal nuclei and cerebellum.

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Enzymes and Energy

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Blood,Heart and Circulation

Cardiac Output,Blood Flow,and Blood Pressure

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Exam 12: Muscle: Mechanisms of Contraction and Neural Control

The thick filament is split by a Z disc.

Shaking of limbs at rest that disappears during voluntary movement due to damage to the basal nuclei is called

Neurotransmitters are released at neuromuscular junctions to smooth muscle cells.

In regards to the relationship between resting muscle fiber length and tension generated,

What structure runs the length of the sarcomere and contributes to the elastic recoil in muscle?

Duchenne's muscular dystrophy

Myostatin is

Endurance training results in increased

________ is characterized by continued attachment of myosin heads to actin filaments due to a lack of ATP.

The movement of the troponin-tropomyosin complex requires

Somatic motor neurons release the neurotransmitter _________ at the neuromuscular junction.

Longer,stronger muscles have motor units with very few fibers.

The thick filament is also called the

Z discs are found bisecting the A bands.

Which of the following does NOT occur during the cross bridge cycle?

A force-velocity curve shows the _______ relationship between the force opposing muscle contraction and the velocity of muscle shortening.

ATP in muscle contraction is needed for

Flexors increase the angle at a joint.

Which of the following is NOT true of slow oxidative/Type I red muscle fibers?

Regulation of motor neurons involves the actions of the basal nuclei and cerebellum.

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Enzymes and Energy

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Blood,Heart and Circulation

Cardiac Output,Blood Flow,and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation and Metabolism

Reproduction

Filters