Question 1

When acetylcholine binds to its receptors at the motor end plate, the muscle fiber membrane becomes more permeable to __________.

Accepted Answer

A)  potassium 
B)  sodium 
C)  calcium 
D)  acetylcholine 
E)  acetylcholinesterase 
A)  potassium 
B)  sodium 
C)  calcium 
D)  acetylcholine 
E)  acetylcholinesterase

Question 2

What type of neurons function to control effectors?

Accepted Answer

A)  Aerobic neurons 
B)  Sensory neurons 
C)  Axon terminals 
D)  Motor neurons 
E)  Motor units 
A)  Aerobic neurons 
B)  Sensory neurons 
C)  Axon terminals 
D)  Motor neurons 
E)  Motor units

Question 3

Activities such as distance swimming and distance running are most likely to stimulate the development of what type of muscle fiber?

Accepted Answer

A)  Slow fibers 
B)  Fast fibers 
A)  Slow fibers 
B)  Fast fibers

Question 4

Which of the following is NOT a basic component of a lever?

Accepted Answer

A)  Rigid bar 
B)  Fulcrum 
C)  Force 
D)  Handle 
E)  Resistance 
A)  Rigid bar 
B)  Fulcrum 
C)  Force 
D)  Handle 
E)  Resistance

Question 5

What term refers to the increase in the number of motor units activated as a result ofmore intensestimulation?

Accepted Answer

A)  Twitch 
B)  Recruitment 
C)  Threshold stimulation 
D)  All-or-none response 
E)  Summation 
A)  Twitch 
B)  Recruitment 
C)  Threshold stimulation 
D)  All-or-none response 
E)  Summation

Question 6

With training, what changes will occur in the muscles of the lower limbs of a marathon runner?

Accepted Answer

A)  Development of more extensive capillary networks; cells develop more mitochondria 
B)  Formation of more actin and myosin, causing enlargement of muscle fibers 
C)  Loss of myoglobin and reduction in size of muscle fibers 
D)  Drastic increase in number of muscle fibers 
A)  Development of more extensive capillary networks; cells develop more mitochondria 
B)  Formation of more actin and myosin, causing enlargement of muscle fibers 
C)  Loss of myoglobin and reduction in size of muscle fibers 
D)  Drastic increase in number of muscle fibers

Question 7

The time between the stimulation of a muscle fiber and the beginning of contraction iscalled the __________ period.

Accepted Answer

The answer of The time between the stimulation of a...

Question 8

What structures consist of actin and myosin filaments?

Accepted Answer

A)  Myofibrils 
B)  T tubules 
C)  Aponeuroses 
D)  Fascicles 
E)  Thick filaments 
A)  Myofibrils 
B)  T tubules 
C)  Aponeuroses 
D)  Fascicles 
E)  Thick filaments

Question 9

What type of smooth muscle is found in the wall of the stomach?

Accepted Answer

A)  Striated muscle 
B)  Visceral muscle 
C)  Multiunit muscle 
D)  Intercalated muscle 
A)  Striated muscle 
B)  Visceral muscle 
C)  Multiunit muscle 
D)  Intercalated muscle

Question 10

What term describes the muscle that is primarily responsible for opposing a particular action?

Accepted Answer

A)  Antagonist 
B)  Prime mover 
C)  Synergist 
D)  Agonist 
A)  Antagonist 
B)  Prime mover 
C)  Synergist 
D)  Agonist

Question 11

Using the muscle name as a clue, what is the action of the extensor carpi ulnaris?

Accepted Answer

A)  To extend the wrist 
B)  To extend the arm at the shoulder 
C)  To dorsiflex the foot 
D)  To extend the leg at the knee 
A)  To extend the wrist 
B)  To extend the arm at the shoulder 
C)  To dorsiflex the foot 
D)  To extend the leg at the knee

Question 12

Using the muscle name as a clue, what is the action of the extensor carpi ulnaris?

Accepted Answer

A)  To extend the wrist 
B)  To extend the arm at the shoulder 
C)  To dorsiflex the foot 
D)  To extend the leg at the knee 
A)  To extend the wrist 
B)  To extend the arm at the shoulder 
C)  To dorsiflex the foot 
D)  To extend the leg at the knee

Question 13

Where are the vesicles that contain neurotransmitter molecules located?

Accepted Answer

A)  Within sarcoplasmic reticulum 
B)  In synaptic cleft 
C)  On motor end plate membranes 
D)  In cytoplasm of motor neuron axon 
E)  At boundaries of sarcomeres 
A)  Within sarcoplasmic reticulum 
B)  In synaptic cleft 
C)  On motor end plate membranes 
D)  In cytoplasm of motor neuron axon 
E)  At boundaries of sarcomeres

Question 14

What is the effect of ATP binding to myosin?

Accepted Answer

A)  Cross-bridges form 
B)  Cross-bridges break 
C)  Troponin and tropomyosin interact to expose binding sites on actin 
D)  Thin filaments become shorter, causing shortening of the sarcomere 
A)  Cross-bridges form 
B)  Cross-bridges break 
C)  Troponin and tropomyosin interact to expose binding sites on actin 
D)  Thin filaments become shorter, causing shortening of the sarcomere

Question 15

What is formed by a motor neuron and all the muscle cells it stimulates?

Accepted Answer

A)  Neuromuscular bundle 
B)  Fascicle 
C)  Motor unit 
D)  Myofibril 
E)  Motor end plate 
A)  Neuromuscular bundle 
B)  Fascicle 
C)  Motor unit 
D)  Myofibril 
E)  Motor end plate

Question 16

The two neurotransmitters that affect smooth muscle cells are acetylcholine and __________.

Accepted Answer

The answer of The two neurotransmitters that affect smooth muscle...

Question 17

What is the name of the functional connection between a motor neuron and a muscle cell?

Accepted Answer

A)  Motor end plate 
B)  Synaptic cleft 
C)  Synaptic vesicle 
D)  Junctional plate 
E)  Neuromuscular junction 
A)  Motor end plate 
B)  Synaptic cleft 
C)  Synaptic vesicle 
D)  Junctional plate 
E)  Neuromuscular junction

Question 18

Activities such as distance swimming and distance running are most likely to stimulate the development of what type of muscle fiber?

Accepted Answer

A)  Slow fibers 
B)  Fast fibers 
A)  Slow fibers 
B)  Fast fibers

Question 19

The two neurotransmitters that affect smooth muscle cells are acetylcholine and __________.

Accepted Answer

The answer of The two neurotransmitters that affect smooth muscle...

Question 20

Myasthenia gravis is an autoimmune disease in which an individual's own immune system produces antibodies to acetylcholine receptors, blocking or destroying them. What would be a major symptom of this disease?

Accepted Answer

A)  Muscle weakness 
B)  Muscle spasms or cramps 
C)  Hypertrophy of affected muscles 
D)  Loss of motor neuron function 
A)  Muscle weakness 
B)  Muscle spasms or cramps 
C)  Hypertrophy of affected muscles 
D)  Loss of motor neuron function

When acetylcholine binds to its receptors at the motor end plate, the muscle fiber membrane becomes more permeable to __________.

What type of neurons function to control effectors?

Activities such as distance swimming and distance running are most likely to stimulate the development of what type of muscle fiber?

Which of the following is NOT a basic component of a lever?

What term refers to the increase in the number of motor units activated as a result ofmore intensestimulation?

With training, what changes will occur in the muscles of the lower limbs of a marathon runner?

The time between the stimulation of a muscle fiber and the beginning of contraction iscalled the __________ period.

What structures consist of actin and myosin filaments?

What type of smooth muscle is found in the wall of the stomach?

What term describes the muscle that is primarily responsible for opposing a particular action?

Using the muscle name as a clue, what is the action of the extensor carpi ulnaris?

Using the muscle name as a clue, what is the action of the extensor carpi ulnaris?

Where are the vesicles that contain neurotransmitter molecules located?

What is the effect of ATP binding to myosin?

What is formed by a motor neuron and all the muscle cells it stimulates?

The two neurotransmitters that affect smooth muscle cells are acetylcholine and __________.

What is the name of the functional connection between a motor neuron and a muscle cell?

Activities such as distance swimming and distance running are most likely to stimulate the development of what type of muscle fiber?

The two neurotransmitters that affect smooth muscle cells are acetylcholine and __________.

Myasthenia gravis is an autoimmune disease in which an individual's own immune system produces antibodies to acetylcholine receptors, blocking or destroying them. What would be a major symptom of this disease?

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

Cells

Cellular Metabolism

Tissues

Integumentary System

Skeletal System

Pregnancy, Growth, Development, and Genetics

Nervous System

The Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

Digestion and Nutrition

Respiratory System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

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Exam 8: Muscular System

When acetylcholine binds to its receptors at the motor end plate, the muscle fiber membrane becomes more permeable to __________.

What type of neurons function to control effectors?

Activities such as distance swimming and distance running are most likely to stimulate the development of what type of muscle fiber?

Which of the following is NOT a basic component of a lever?

What term refers to the increase in the number of motor units activated as a result ofmore intensestimulation?

With training, what changes will occur in the muscles of the lower limbs of a marathon runner?

The time between the stimulation of a muscle fiber and the beginning of contraction iscalled the __________ period.

What structures consist of actin and myosin filaments?

What type of smooth muscle is found in the wall of the stomach?

What term describes the muscle that is primarily responsible for opposing a particular action?

Using the muscle name as a clue, what is the action of the extensor carpi ulnaris?

Using the muscle name as a clue, what is the action of the extensor carpi ulnaris?

Where are the vesicles that contain neurotransmitter molecules located?

What is the effect of ATP binding to myosin?

What is formed by a motor neuron and all the muscle cells it stimulates?

The two neurotransmitters that affect smooth muscle cells are acetylcholine and __________.

What is the name of the functional connection between a motor neuron and a muscle cell?

Activities such as distance swimming and distance running are most likely to stimulate the development of what type of muscle fiber?

The two neurotransmitters that affect smooth muscle cells are acetylcholine and __________.

Myasthenia gravis is an autoimmune disease in which an individual's own immune system produces antibodies to acetylcholine receptors, blocking or destroying them. What would be a major symptom of this disease?

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

Cells

Cellular Metabolism

Tissues

Integumentary System

Skeletal System

Pregnancy, Growth, Development, and Genetics

Nervous System

The Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

Digestion and Nutrition

Respiratory System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Filters