Question 1

Sarcopenia is a condition that occurs in muscle tissue with aging. As a person ages, their muscle tissue

Accepted Answer

A)   decreases overall, leading to a decrease in strength.
B)   decreases due to the muscle's need for greater energy.
C)   increases due to an increased amount of actin in the muscle fiber.
D)   increases due to increased blood flow to the muscles.E) A) and C)
F) None of the above

Question 2

The Z disks, sometimes referred to as Z lines, define each sarcomere at both ends.

Accepted Answer

A) True 
 B)False

Question 3

Both single-unit smooth muscle and this type of muscle have gap junctions.

Accepted Answer

A)   skeletal muscle
B)   smooth muscle
C)   cardiac muscleD) All of the above
E) None of the above

Question 4

The type of attachment in which the muscle fibers seem to attach directly to a bone is

Accepted Answer

A)   a tendon.
B)   an aponeurosis.
C)   an insertion.
D)   a fleshy attachment.E) C) and D)
F) None of the above

Question 5

In striated muscle cells, which of these structures stores calcium ions that trigger contraction?

Accepted Answer

A)   the internal surface of the plasma membrane
B)   the terminal cisterns
C)   T tubules
D)   the myofibrilsE) C) and D)
F) B) and D)

Question 6

Which region of the sarcomere does not change in length during contraction?

Accepted Answer

A)   A band
B)   H zone
C)   I band
D)   Z disk to Z diskE) A) and C)
F) B) and C)

Question 7

Most muscles that are involved in maintaining posture contain high percentages of ________ fibers.

Accepted Answer

The answer of Most muscles that are involved in maintaining...

Question 8

The origin of a muscle can also be an insertion, depending on the position of the body and the movement being performed.

Accepted Answer

A) True 
 B)False

Question 9

As a muscle is stretched, the Z discs move further apart, and the I band increases in size. What is the role if titin in this situation?

Accepted Answer

A)   It prevents the sarcomere from being pulled apart as this stretching occurs.
B)   It prevents the thick filaments from sliding over the thin filaments.
C)   It moves the tropomyosin molecule from the actin filament.
D)   It is required for the release of ATP in this process.E) A) and B)
F) B) and C)

Question 10

One of the largest and strongest muscles in the body is the gluteus maximus in the buttocks, which is important in these diverse muscular activities: walking, running, and jumping. It must consist of

Accepted Answer

A)   slow oxidative fibers only.
B)   fast glycolytic fibers only.
C)   fast oxidative fibers only.
D)   a mixture of fiber types.E) A) and B)
F) A) and C)

Question 11

All of these are functions of muscle tissue except

Accepted Answer

A)   production of movement
B)   maintain posture
C)   generate heat
D)   line surfaces in the bodyE) A) and B)
F) None of the above

Question 12

Each nerve impulse to a muscle fiber is able to create just one twitch of that fiber because

Accepted Answer

A)   acetylcholine is a weak neurotransmitter only capable of generating one twitch at a time.
B)   Acetylcholinesterase breaks down acetylcholine immediately after the contraction is signaled.
C)   The sarcolemma is only able to release calcium once per millisecond.
D)   The muscle fiber is easily fatigued, so it can only twitch once before needing an interval of rest.E) B) and C)
F) A) and B)

Question 13

The sleeve-like tubular network within skeletal muscle cells is the

Accepted Answer

A)   sarcoplasmic reticulum.
B)   rough endoplasmic reticulum.
C)   myofibril.
D)   T tubule.E) None of the above
F) All of the above

Question 14

Contraction of a muscle cell requires the influx of calcium into the sarcoplasm.

Accepted Answer

A) True 
 B)False

Question 15

Of the various types of skeletal muscle fibers, the ones with the thinnest myofibrils, and, therefore, the ones that generate the least amount of power, are

Accepted Answer

A)   slow oxidative fibers.
B)   fast glycolytic fibers.
C)   fast oxidative fibers.
D)   slow glycolytic fibers.E) B) and C)
F) A) and D)

Question 16

Skeletal muscles never undergo mitosis after they are fully formed.

Accepted Answer

A) True 
 B)False

Question 17

This type of muscle makes up the walls of hollow organs, such as the stomach and uterus.

Accepted Answer

A)   skeletal muscle
B)   smooth muscle
C)   cardiac muscleD) A) and C)
E) B) and C)

Question 18

Describe how the components of a sarcomere change during contraction.

Accepted Answer

The distance between the Z discs shorten...

Question 19

The embryonic origin of muscle tissue is from

Accepted Answer

A)   endoderm.
B)   mesoderm.
C)   ectoderm.
D)   epidermis.E) None of the above
F) A) and B)

Question 20

Of the various types of skeletal muscle fibers, the type that produces the most power is

Accepted Answer

A)   slow oxidative fibers.
B)   fast glycolytic fibers.
C)   fast oxidative fibers.
D)   slow glycolytic fibers.E) A) and B)
F) A) and C)

Exam 10: Skeletal Muscle Tissue

In striated muscle cells, which of these structures stores calcium ions that trigger contraction?

Correct AnswerverifiedShow Answer

Of the various types of skeletal muscle fibers, the type that produces the most power is

Correct AnswerverifiedShow Answer

Describe how the components of a sarcomere change during contraction.

Correct AnswerverifiedThe distance between the Z discs shorten...View AnswerShow Answer

The type of attachment in which the muscle fibers seem to attach directly to a bone is

Correct AnswerverifiedShow Answer

Which region of the sarcomere does not change in length during contraction?

Correct AnswerverifiedShow Answer

This type of muscle makes up the walls of hollow organs, such as the stomach and uterus.

Correct AnswerverifiedShow Answer

Most muscles that are involved in maintaining posture contain high percentages of ________ fibers.

Correct AnswerverifiedShow Answer

Contraction of a muscle cell requires the influx of calcium into the sarcoplasm.

Correct AnswerverifiedShow Answer

As a muscle is stretched, the Z discs move further apart, and the I band increases in size. What is the role if titin in this situation?

Correct AnswerverifiedShow Answer

All of these are functions of muscle tissue except

Correct AnswerverifiedShow Answer

The embryonic origin of muscle tissue is from

Correct AnswerverifiedShow Answer

One of the largest and strongest muscles in the body is the gluteus maximus in the buttocks, which is important in these diverse muscular activities: walking, running, and jumping. It must consist of

Correct AnswerverifiedShow Answer

Skeletal muscles never undergo mitosis after they are fully formed.

Correct AnswerverifiedShow Answer

The sleeve-like tubular network within skeletal muscle cells is the

Correct AnswerverifiedShow Answer

Sarcopenia is a condition that occurs in muscle tissue with aging. As a person ages, their muscle tissue

Correct AnswerverifiedShow Answer

Of the various types of skeletal muscle fibers, the ones with the thinnest myofibrils, and, therefore, the ones that generate the least amount of power, are

Correct AnswerverifiedShow Answer

The origin of a muscle can also be an insertion, depending on the position of the body and the movement being performed.

Correct AnswerverifiedShow Answer

Both single-unit smooth muscle and this type of muscle have gap junctions.

Correct AnswerverifiedShow Answer

Each nerve impulse to a muscle fiber is able to create just one twitch of that fiber because

Correct AnswerverifiedShow Answer

The Z disks, sometimes referred to as Z lines, define each sarcomere at both ends.

Correct AnswerverifiedShow Answer

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The distance between the Z discs shorten...
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