Question 1

Muscle fatigue results from a combination of insufficient calcium and an excessof acetylcholine.

Accepted Answer

A) True 
 B)False

Question 2

In the initiation ofmuscle contraction, calcium ions bind totropomyosin, exposing active sites on actin for cross-bridge formation.

Accepted Answer

A) True 
 B)False

Question 3

What is the action of the enzyme acetylcholinesterase?

Accepted Answer

A)  Needed for acetylcholine bind to troponin 
B)  Causes secretion of acetylcholine into synaptic cleft 
C)  Breaks down acetylcholine 
D)  Forms cross-bridge between acetylcholine molecules and acetylcholine receptors 
E)  Stimulates production of acetylcholine within synaptic vesicles 
A)  Needed for acetylcholine bind to troponin 
B)  Causes secretion of acetylcholine into synaptic cleft 
C)  Breaks down acetylcholine 
D)  Forms cross-bridge between acetylcholine molecules and acetylcholine receptors 
E)  Stimulates production of acetylcholine within synaptic vesicles

Question 4

What type of muscle fiber will be more resistant to fatigue?

Accepted Answer

A)  Fast fiber 
B)  Slow fiber 
A)  Fast fiber 
B)  Slow fiber

Question 5

Which muscles share the same primary action?

Accepted Answer

A)  Gluteus maximus and iliacus 
B)  Gastrocnemius and soleus 
C)  Zygomaticus and platysma 
D)  Brachialis and triceps brachii 
A)  Gluteus maximus and iliacus 
B)  Gastrocnemius and soleus 
C)  Zygomaticus and platysma 
D)  Brachialis and triceps brachii

Question 6

What muscle can act as a prime mover for plantar flexion of the foot?

Accepted Answer

A)  Gastrocnemius 
B)  Tibialis anterior 
C)  Extensor digitorum longus 
D)  Biceps femoris 
A)  Gastrocnemius 
B)  Tibialis anterior 
C)  Extensor digitorum longus 
D)  Biceps femoris

Question 7

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 8

What is peristalsis?

Accepted Answer

A)  A single contraction in response to a single stimulus of a muscle fiber 
B)  A sustained contraction of a muscle fiber 
C)  Wavelike smooth muscle contraction 
D)  Contraction of progressively more motor units as stimulation strength increases 
E)  The smallest strength of stimulus that will trigger a contraction of skeletal muscle fibers 
A)  A single contraction in response to a single stimulus of a muscle fiber 
B)  A sustained contraction of a muscle fiber 
C)  Wavelike smooth muscle contraction 
D)  Contraction of progressively more motor units as stimulation strength increases 
E)  The smallest strength of stimulus that will trigger a contraction of skeletal muscle fibers

Question 9

What type of smooth muscle consists of muscle fibers that are separate rather than organized into sheets?

Accepted Answer

A)  Multiunit smooth muscle 
B)  Visceral smooth muscle 
C)  Skeletal muscle 
D)  Cardiac muscle 
A)  Multiunit smooth muscle 
B)  Visceral smooth muscle 
C)  Skeletal muscle 
D)  Cardiac muscle

Question 10

What is a description of the region known as the motor end plate?

Accepted Answer

A)  It has many openings leading into transverse tubules. 
B)  Mitochondria are abundant. 
C)  Synaptic vesicles are abundant. 
D)  It functions to release neurotransmitter molecules. 
A)  It has many openings leading into transverse tubules. 
B)  Mitochondria are abundant. 
C)  Synaptic vesicles are abundant. 
D)  It functions to release neurotransmitter molecules.

Question 11

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 12

In muscle anatomy, what is an origin?

Accepted Answer

A)  The less movable end of a muscle 
B)  The more movable end of the muscle 
C)  The point of attachment of a tendon to a muscle 
D)  The location of a neuromuscular junction 
E)  The boundary between neighboring sarcomeres 
A)  The less movable end of a muscle 
B)  The more movable end of the muscle 
C)  The point of attachment of a tendon to a muscle 
D)  The location of a neuromuscular junction 
E)  The boundary between neighboring sarcomeres

Question 13

An isotonic contraction is one that involves a change in length but not a change in tension.

Accepted Answer

A) True 
 B)False

Question 14

What is peristalsis?

Accepted Answer

A)  A single contraction in response to a single stimulus of a muscle fiber 
B)  A sustained contraction of a muscle fiber 
C)  Wavelike smooth muscle contraction 
D)  Contraction of progressively more motor units as stimulation strength increases 
E)  The smallest strength of stimulus that will trigger a contraction of skeletal muscle fibers 
A)  A single contraction in response to a single stimulus of a muscle fiber 
B)  A sustained contraction of a muscle fiber 
C)  Wavelike smooth muscle contraction 
D)  Contraction of progressively more motor units as stimulation strength increases 
E)  The smallest strength of stimulus that will trigger a contraction of skeletal muscle fibers

Question 15

Which two muscles share the same primary action?

Accepted Answer

A)  Temporalis and masseter 
B)  Levator scapulae and pectoralis minor 
C)  Supinator and pronator teres 
D)  Biceps femoris and rectus femoris 
A)  Temporalis and masseter 
B)  Levator scapulae and pectoralis minor 
C)  Supinator and pronator teres 
D)  Biceps femoris and rectus femoris

Question 16

During the process of glycolysis, the breakdown of one glucose molecules results in production of two ATP molecules.

Accepted Answer

A) True 
 B)False

Question 17

What is the effect of an increased concentration of calcium ion in the sarcoplasm?

Accepted Answer

A)  Actin binding sites become exposed. 
B)  Myosin binding sites become exposed. 
C)  Troponin binding sites become exposed. 
D)  Actin and myosin become unable to accomplish contraction. 
A)  Actin binding sites become exposed. 
B)  Myosin binding sites become exposed. 
C)  Troponin binding sites become exposed. 
D)  Actin and myosin become unable to accomplish contraction.

Question 18

Intercalated discs are found in skeletal muscle and cardiac muscle, but are not present in smooth muscle.

Accepted Answer

A) True 
 B)False

Question 19

What enzyme catalyzes the breakdown of the neurotransmitter used to stimulate skeletal muscle?

Accepted Answer

A)  Tropomyosin 
B)  ATPase 
C)  Acetylcholinesterase 
D)  Norephinephrine 
A)  Tropomyosin 
B)  ATPase 
C)  Acetylcholinesterase 
D)  Norephinephrine

Question 20

If frequency of stimulation to a muscle fiber is increased, the force of contraction will increase.

Accepted Answer

A) True 
 B)False

Muscle fatigue results from a combination of insufficient calcium and an excessof acetylcholine.

In the initiation ofmuscle contraction, calcium ions bind totropomyosin, exposing active sites on actin for cross-bridge formation.

What is the action of the enzyme acetylcholinesterase?

What type of muscle fiber will be more resistant to fatigue?

Which muscles share the same primary action?

What muscle can act as a prime mover for plantar flexion of the foot?

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

What is peristalsis?

What type of smooth muscle consists of muscle fibers that are separate rather than organized into sheets?

What is a description of the region known as the motor end plate?

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

In muscle anatomy, what is an origin?

An isotonic contraction is one that involves a change in length but not a change in tension.

What is peristalsis?

Which two muscles share the same primary action?

During the process of glycolysis, the breakdown of one glucose molecules results in production of two ATP molecules.

What is the effect of an increased concentration of calcium ion in the sarcoplasm?

Intercalated discs are found in skeletal muscle and cardiac muscle, but are not present in smooth muscle.

What enzyme catalyzes the breakdown of the neurotransmitter used to stimulate skeletal muscle?

If frequency of stimulation to a muscle fiber is increased, the force of contraction will increase.

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

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Exam 8: Muscular System

Muscle fatigue results from a combination of insufficient calcium and an excessof acetylcholine.

In the initiation ofmuscle contraction, calcium ions bind totropomyosin, exposing active sites on actin for cross-bridge formation.

What is the action of the enzyme acetylcholinesterase?

What type of muscle fiber will be more resistant to fatigue?

Which muscles share the same primary action?

What muscle can act as a prime mover for plantar flexion of the foot?

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

What is peristalsis?

What type of smooth muscle consists of muscle fibers that are separate rather than organized into sheets?

What is a description of the region known as the motor end plate?

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

In muscle anatomy, what is an origin?

An isotonic contraction is one that involves a change in length but not a change in tension.

What is peristalsis?

Which two muscles share the same primary action?

During the process of glycolysis, the breakdown of one glucose molecules results in production of two ATP molecules.

What is the effect of an increased concentration of calcium ion in the sarcoplasm?

Intercalated discs are found in skeletal muscle and cardiac muscle, but are not present in smooth muscle.

What enzyme catalyzes the breakdown of the neurotransmitter used to stimulate skeletal muscle?

If frequency of stimulation to a muscle fiber is increased, the force of contraction will increase.

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