Question 1

Muscle spasms can be avoided by stretching slowly,which stimulates mainly the primary,annulospiral sensory endings.

Accepted Answer

A) True 
 B)False

Question 2

A muscle contraction against a resistance that is greater than the force and causes muscle lengthening is a(n)

Accepted Answer

A) concentric contraction. 
B) isometric contraction. 
C) eccentric contraction. 
D) isokinetic contraction. 
A) concentric contraction. 
B) isometric contraction. 
C) eccentric contraction. 
D) isokinetic contraction.

Question 3

An individual suffering damage to the basal nuclei resulting in a lack of desire to use a limb would be suffering from

Accepted Answer

A) Parkinson's disease. 
B) chorea. 
C) intention tremor. 
D) akinesia. 
A) Parkinson's disease. 
B) chorea. 
C) intention tremor. 
D) akinesia.

Question 4

When a muscle cell generates tension but does not shorten,a(n)______ contraction occurs.

Accepted Answer

A) isometric 
B) isotonic 
C) spastic 
D) flaccid 
A) isometric 
B) isotonic 
C) spastic 
D) flaccid

Question 5

Blood lactate will begin to rise when exercise is performed at a rate that is

Accepted Answer

A) 15% of VO2max. 
B) 25% of VO2max. 
C) 50% of VO2max. 
D) 85% of VO2max. 
A) 15% of VO2max. 
B) 25% of VO2max. 
C) 50% of VO2max. 
D) 85% of VO2max.

Question 6

Central fatigue is caused by

Accepted Answer

A) decreased H+ concentration in the muscle cells. 
B) increased glycogen in muscle cells. 
C) changes in the CNS. 
D) All apply. 
A) decreased H+ concentration in the muscle cells. 
B) increased glycogen in muscle cells. 
C) changes in the CNS. 
D) All apply.

Question 7

The actin filament is a polymer formed from 300 to 400 globular subunits called

Accepted Answer

A) I-actin. 
B) T-actin. 
C) G-actin. 
D) C-actin. 
A) I-actin. 
B) T-actin. 
C) G-actin. 
D) C-actin.

Question 8

Which of the following does NOT increase the strength of the muscle contraction?

Accepted Answer

A) a high number of fibers stimulated 
B) increased frequency of stimulation 
C) thicker muscle fiber 
D) resting sarcomere length of 3.6µm 
A) a high number of fibers stimulated 
B) increased frequency of stimulation 
C) thicker muscle fiber 
D) resting sarcomere length of 3.6µm

Question 9

Fast twitch fibers have the greatest resistance to fatigue.

Accepted Answer

A) True 
 B)False

Question 10

Thin filaments are composed of myosin and tropomyosin.

Accepted Answer

A) True 
 B)False

Question 11

Hemiplegia is paralysis of an upper limb of one side and the lower limb of the other side.

Accepted Answer

A) True 
 B)False

Question 12

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 13

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 14

Activation of intrafusal fibers by alpha motoneurons creates muscle tone.

Accepted Answer

A) True 
 B)False

Question 15

The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.

Accepted Answer

A) True 
 B)False

Question 16

Smooth,sustained muscle contractions in vivo are due to synchronous activation of motor units.

Accepted Answer

A) True 
 B)False

Question 17

Flexors increase the angle at a joint.

Accepted Answer

A) True 
 B)False

Question 18

The amount of fat stored in skeletal muscles will be ______________ by endurance training.

Accepted Answer

A) increased 
B) decreased 
C) unchanged 
A) increased 
B) decreased 
C) unchanged

Question 19

Smooth muscle cells

Accepted Answer

A) contain intercalated discs. 
B) contain A and I bands. 
C) are innervated by somatic nerves. 
D) may contain gap junctions. 
A) contain intercalated discs. 
B) contain A and I bands. 
C) are innervated by somatic nerves. 
D) may contain gap junctions.

Question 20

The more movable bony attachment is the

Accepted Answer

A) flexor. 
B) origin. 
C) extensor. 
D) insertion. 
A) flexor. 
B) origin. 
C) extensor. 
D) insertion.

Muscle spasms can be avoided by stretching slowly,which stimulates mainly the primary,annulospiral sensory endings.

A muscle contraction against a resistance that is greater than the force and causes muscle lengthening is a(n)

An individual suffering damage to the basal nuclei resulting in a lack of desire to use a limb would be suffering from

When a muscle cell generates tension but does not shorten,a(n)______ contraction occurs.

Blood lactate will begin to rise when exercise is performed at a rate that is

Central fatigue is caused by

The actin filament is a polymer formed from 300 to 400 globular subunits called

Which of the following does NOT increase the strength of the muscle contraction?

Fast twitch fibers have the greatest resistance to fatigue.

Thin filaments are composed of myosin and tropomyosin.

Hemiplegia is paralysis of an upper limb of one side and the lower limb of the other side.

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

The movement of the troponin-tropomyosin complex requires

Activation of intrafusal fibers by alpha motoneurons creates muscle tone.

The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.

Smooth,sustained muscle contractions in vivo are due to synchronous activation of motor units.

Flexors increase the angle at a joint.

The amount of fat stored in skeletal muscles will be ______________ by endurance training.

Smooth muscle cells

The more movable bony attachment is the

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

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

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Exam 12: Muscle: Mechanisms of Contraction and Neural Control

Muscle spasms can be avoided by stretching slowly,which stimulates mainly the primary,annulospiral sensory endings.

A muscle contraction against a resistance that is greater than the force and causes muscle lengthening is a(n)

An individual suffering damage to the basal nuclei resulting in a lack of desire to use a limb would be suffering from

When a muscle cell generates tension but does not shorten,a(n)______ contraction occurs.

Blood lactate will begin to rise when exercise is performed at a rate that is

Central fatigue is caused by

The actin filament is a polymer formed from 300 to 400 globular subunits called

Which of the following does NOT increase the strength of the muscle contraction?

Fast twitch fibers have the greatest resistance to fatigue.

Thin filaments are composed of myosin and tropomyosin.

Hemiplegia is paralysis of an upper limb of one side and the lower limb of the other side.

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

The movement of the troponin-tropomyosin complex requires

Activation of intrafusal fibers by alpha motoneurons creates muscle tone.

The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.

Smooth,sustained muscle contractions in vivo are due to synchronous activation of motor units.

Flexors increase the angle at a joint.

The amount of fat stored in skeletal muscles will be ______________ by endurance training.

Smooth muscle cells

The more movable bony attachment is the

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

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