Question 1

Using the figure above and labels A through D below, identify the structures indicated.
-Structure A is a(n)  ________.

Accepted Answer

A)  tendon
B)  fascicle
C)  whole muscle
D)  muscle fiber A

Question 2

Match the following muscles to their function.
-flexes thigh at the hip; extends leg at knee

Accepted Answer

A)  gastrocnemius
B)  deltoid
C)  external oblique
D)  triceps brachii
E)  quadricepsF) tibialis anteriorG) biceps brachiiH) trapezius

Question 3

Match each disorder or disease of the muscular system with its description.
-inflammation of the connective tissue layers surrounding a muscle; common in the sole of the foot

Accepted Answer

A)  muscle cramps
B)  muscular dystrophy
C)  tetanus
D)  fasciitis

Question 4

Muscle cells produce lactic acid when they have an inadequate supply of

Accepted Answer

A)   protein.
B)   O2.
C)   calcium.
D)   actin and myosin.
E)   glycogen.

Question 5

T, or transverse, tubes in skeletal muscle function to

Accepted Answer

A)   transport calcium ions throughout muscle cells.
B)   allow actin and myosin filaments to slide over each other.
C)   promote the rapid penetration of the electrical impulse deep into the cell.
D)   help decrease the amount of ATP produced.
E)   convert glucose to lactic acid, which helps muscles relax. C

Question 6

Contraction of a skeletal muscle cell is initiated by the

Accepted Answer

A)   release of acetylcholine by a neuron terminating at the neuromuscular junction.
B)   release of calcium ions by the neuron into the neuromuscular junction.
C)   electrical current traveling from the neuron directly into the muscle cell.
D)   hormones delivered by the blood supply to the nearby tissue.
E)   release of sodium ions by the neuron into the neuromuscular junction.

Question 7

Skeletal muscle groups that work together to create the same movement are referred to as

Accepted Answer

A)   involuntary.
B)   antagonistic.
C)   synergistic.
D)   sarcomeres.
E)   myofibrils.

Question 8

Plantar fasciitis is an inflammation of the fascia within the sole of the foot, resulting in foot and heel pain. What is a fascia?

Accepted Answer

A)   a bundle of muscle cells that are enclosed in a connective tissue sheath
B)   a bundle of protein filaments (thick and thin)  located within muscle cells
C)   the fibrous connective tissue sheath that surrounds the fascicles of the muscle
D)   a connective tissue structure that attaches one muscle to another muscle
E)   the area where the actin and myosin filaments overlap within a muscle cell

Question 9

In skeletal muscle, potassium ions are stored in the sarcoplasmic reticulum.

Accepted Answer

A) True 
 B)False

Question 10

Isometric contractions usually result in no movement of the skeleton or objects.

Accepted Answer

A) True 
 B)False

Question 11

In the absence of ATP, a contracted muscle can't relax.

Accepted Answer

A) True 
 B)False

Question 12

Match the following muscles to their function.
-extends forearm at elbow

Accepted Answer

A)  gastrocnemius
B)  deltoid
C)  external oblique
D)  triceps brachii
E)  quadricepsF) tibialis anteriorG) biceps brachiiH) trapezius

Question 13

Match the following muscles to their function.
-causes lateral rotation of the trunk and abdominal compression

Accepted Answer

A)  gastrocnemius
B)  deltoid
C)  external oblique
D)  triceps brachii
E)  quadricepsF) tibialis anteriorG) biceps brachiiH) trapezius

Question 14

According to the sliding filament mechanism, during a muscle contraction, myosin pulls actin filaments toward the center of a sarcomere, causing the entire sarcomere to shorten.

Accepted Answer

A) True 
 B)False

Question 15

To minimize muscle stiffness and soreness, undertake a new exercise activity in ________ for the first few days.

Accepted Answer

The answer of To minimize muscle stiffness and soreness, undertake...

Question 16

In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are

Accepted Answer

A)   synergistic.
B)   homeostatic.
C)   mutualistic.
D)   antagonistic.
E)   cooperative. D

Question 17

The "all-or-none principle" states that in a given muscle, all of the cells are contracting simultaneously or none of them is contracting.

Accepted Answer

A) True 
 B)False

Question 18

An individual with the condition of myasthenia gravis is faced with an autoimmune disorder in which the body defenses attack acetylcholine receptors on muscle cells. What would be the expected effect on calcium levels near contractile proteins, following the arrival of an electrical impulse at those neuromuscular junctions?

Accepted Answer

A)   a rapid decrease in concentration due to uptake by sarcoplasmic reticulum
B)   a rapid increase in concentration due to release by sarcoplasmic reticulum
C)   small or no increases in concentration due to weak responses by acetylcholine receptors
D)   a large decrease in concentration that occurs slowly
E)   a large increase in concentration that occurs slowly

Question 19

Which one of the following is found within a sarcomere?

Accepted Answer

A)   the muscle cell nuclei
B)   muscle fibers
C)   the actin and myosin filaments
D)   fascicles
E)   fascia

Question 20

Match each disorder or disease of the muscular system with its description.
-uncontrolled contraction of muscle, usually after heavy exercise

Accepted Answer

A)  muscle cramps
B)  muscular dystrophy
C)  tetanus
D)  fasciitis

Exam 6: The Muscular System

Using the figure above and labels A through D below, identify the structures indicated. -Structure A is a(n) ________.

Correct Answer
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A

Match the following muscles to their function. -flexes thigh at the hip; extends leg at knee

Correct Answer
verified

Match each disorder or disease of the muscular system with its description. -inflammation of the connective tissue layers surrounding a muscle; common in the sole of the foot

Correct Answer
verified

Muscle cells produce lactic acid when they have an inadequate supply of

Correct Answer
verified

T, or transverse, tubes in skeletal muscle function to

Correct Answer
verified
C

Contraction of a skeletal muscle cell is initiated by the

Correct Answer
verified

Skeletal muscle groups that work together to create the same movement are referred to as

Correct Answer
verified

Plantar fasciitis is an inflammation of the fascia within the sole of the foot, resulting in foot and heel pain. What is a fascia?

Correct Answer
verified

In skeletal muscle, potassium ions are stored in the sarcoplasmic reticulum.

Correct Answer
verified

Isometric contractions usually result in no movement of the skeleton or objects.

Correct Answer
verified

In the absence of ATP, a contracted muscle can't relax.

Correct Answer
verified

Match the following muscles to their function. -extends forearm at elbow

Correct Answer
verified

Match the following muscles to their function. -causes lateral rotation of the trunk and abdominal compression

Correct Answer
verified

According to the sliding filament mechanism, during a muscle contraction, myosin pulls actin filaments toward the center of a sarcomere, causing the entire sarcomere to shorten.

Correct Answer
verified

To minimize muscle stiffness and soreness, undertake a new exercise activity in ________ for the first few days.

Correct Answer
verified

In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are

Correct Answer
verified
D

The "all-or-none principle" states that in a given muscle, all of the cells are contracting simultaneously or none of them is contracting.

Correct Answer
verified

Correct Answer
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Which one of the following is found within a sarcomere?

Correct Answer
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Match each disorder or disease of the muscular system with its description. -uncontrolled contraction of muscle, usually after heavy exercise

Correct Answer
verified

Exam 6: The Muscular System

Using the figure above and labels A through D below, identify the structures indicated. -Structure A is a(n) ________.

Correct AnswerverifiedA

Match the following muscles to their function. -flexes thigh at the hip; extends leg at knee

Correct AnswerverifiedShow Answer

Match each disorder or disease of the muscular system with its description. -inflammation of the connective tissue layers surrounding a muscle; common in the sole of the foot

Correct AnswerverifiedShow Answer

Muscle cells produce lactic acid when they have an inadequate supply of

Correct AnswerverifiedShow Answer

T, or transverse, tubes in skeletal muscle function to

Correct AnswerverifiedC

Contraction of a skeletal muscle cell is initiated by the

Correct AnswerverifiedShow Answer

Skeletal muscle groups that work together to create the same movement are referred to as

Correct AnswerverifiedShow Answer

Plantar fasciitis is an inflammation of the fascia within the sole of the foot, resulting in foot and heel pain. What is a fascia?

Correct AnswerverifiedShow Answer

In skeletal muscle, potassium ions are stored in the sarcoplasmic reticulum.

Correct AnswerverifiedShow Answer

Isometric contractions usually result in no movement of the skeleton or objects.

Correct AnswerverifiedShow Answer

In the absence of ATP, a contracted muscle can't relax.

Correct AnswerverifiedShow Answer

Match the following muscles to their function. -extends forearm at elbow

Correct AnswerverifiedShow Answer

Match the following muscles to their function. -causes lateral rotation of the trunk and abdominal compression

Correct AnswerverifiedShow Answer

According to the sliding filament mechanism, during a muscle contraction, myosin pulls actin filaments toward the center of a sarcomere, causing the entire sarcomere to shorten.

Correct AnswerverifiedShow Answer

To minimize muscle stiffness and soreness, undertake a new exercise activity in ________ for the first few days.

Correct AnswerverifiedShow Answer

In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are

Correct AnswerverifiedD

The "all-or-none principle" states that in a given muscle, all of the cells are contracting simultaneously or none of them is contracting.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which one of the following is found within a sarcomere?

Correct AnswerverifiedShow Answer

Match each disorder or disease of the muscular system with its description. -uncontrolled contraction of muscle, usually after heavy exercise

Correct AnswerverifiedShow Answer

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A

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C

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D

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