Question 1

In skeletal muscle, the sarcoplasmic reticulum (SR) :

Accepted Answer

A)   forms transverse (T)  tubules.
B)   is similar to the Golgi complex.
C)   contains extracellular fluid.
D)   releases Ca2+ to trigger contraction.E) B) and C)
F) A) and C)

Question 2

The skeletal muscle fibers that fatigue most easily are:
1)  red muscle fibers.
2)  slow oxidative (type I)  fibers.
3)  fast glycolytic (type IIb)  fibers.

Accepted Answer

A)   1 only
B)   2 only
C)   3 only
D)   both 1 and 3.E) B) and D)
F) B) and C)

Question 3

Match the connective tissue components of skeletal muscle with the tissues.
Identify the characteristics of skeletal muscle tissue.

Accepted Answer

A)   voluntary, striated
B)   involuntary, striatedC) A) and B)
D) undefined

Question 4

One sarcomere contains all of the following EXCEPT:

Accepted Answer

A)   the H zone
B)   myosin
C)   myofibrils
D)   the M lineE) A) and D)
F) None of the above

Question 5

Track and field athletes specializing in the 100 meter dash will train their bodies for explosive power when pushing off the starting blocks. Which type of muscle fiber is being isolated during strength training to generate this explosive power?

Accepted Answer

A)   slow oxidative fibers
B)   fast oxidative glycolytic fibers
C)   fast glycolytic fibersD) A) and B)
E) A) and C)

Question 6

Stretching before a workout is the best way to increase flexibility of muscles.

Accepted Answer

A) True 
 B)False

Question 7

Which type of muscle develops from the mesodermal cells that envelope the developing gastrointestinal tract, viscera, and blood vessels?

Accepted Answer

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

Question 8

Somites give rise to the skeletal muscles of the thoracic and abdominal walls as well as the appendages.

Accepted Answer

A) True 
 B)False

Question 9

As skeletal muscle ages, after age 30, which of the following does NOT occur?

Accepted Answer

A)   decrease in maximal strength
B)   decrease in the relative number of slow oxidative fibers
C)   replacement of muscle mass by fibrous connective tissue and adipose tissue
D)   slowing of muscle reflexesE) A) and B)
F) C) and D)

Question 10

The transverse (T) tubule is a specialized region of sarcolemma that is located at a neuromuscular junction.

Accepted Answer

A) True 
 B)False

Question 11

Autorhythmicity is the ability to repeatedly generate spontaneous action potentials.

Accepted Answer

A) True 
 B)False  True

Question 12

After years of living a sedentary life, you start a couch-to-13.1K training regimen. This change in activity includes daily long distance runs. These distance runs are inducing changes in which muscle fiber types?

Accepted Answer

A)   slow oxidative fibers into fast oxidative glycolytic fibers
B)   fast oxidative glycolytic fibers into fast glycolytic fibers
C)   fast glycolytic fibers into fast oxidative glycolytic fibers
D)   fast glycolytic fibers into slow oxidative fibersE) None of the above
F) All of the above C

Question 13

The muscle fibers that are oxidative and resistant to fatigue are the slow oxidative fibers.

Accepted Answer

A) True 
 B)False

Question 14

Identify this organelle of the muscle fiber (cell)  labeled A.

Accepted Answer

A)   Golgi complex
B)   sarcoplasmic reticulum
C)   nucleus
D)   mitochondrionE) B) and C)
F) None of the above

Question 15

A bundle (fascicle) of skeletal muscle fibers (cells) is separated from neighboring bundles by perimysium.

Accepted Answer

A) True 
 B)False

Question 16

During an isotonic contraction of a muscle, the muscle shortens while the tension in the muscle increases, as in straightening the legs when rising from a sitting position to a standing position.

Accepted Answer

A) True 
 B)False  False

Question 17

Match the connective tissue components of skeletal muscle with the tissues.
Match perimysium with the correct tissue type.

Accepted Answer

A)   areolar connective tissue plus adipose tissue
B)   dense irregular connective tissueC) A) and B)
D) undefined

Question 18

When examined microscopically, striations are visible in the _____ muscle tissues.

Accepted Answer

A)   cardiac and skeletal
B)   smooth and skeletal
C)   cardiac and smooth
D)   skeletal ONLYE) B) and D)
F) A) and B)

Question 19

Match the connective tissue components of skeletal muscle with the tissues.
Identify the description of a motor end plate.

Accepted Answer

A)   region of sarcolemma at the neuromuscular junction
B)   portion of axon terminal membrane that releases acetylcholine into the cleftC) A) and B)
D) undefined

Question 20

Cardiac muscle tissue may be classified as either visceral (single-unit) or multiunit muscle tissue.

Accepted Answer

A) True 
 B)False

Exam 10: Muscular Tissue

In skeletal muscle, the sarcoplasmic reticulum (SR) :

Correct AnswerverifiedShow Answer

The skeletal muscle fibers that fatigue most easily are: 1) red muscle fibers. 2) slow oxidative (type I) fibers. 3) fast glycolytic (type IIb) fibers.

Correct AnswerverifiedShow Answer

Match the connective tissue components of skeletal muscle with the tissues. Identify the characteristics of skeletal muscle tissue.

Correct AnswerverifiedShow Answer

One sarcomere contains all of the following EXCEPT:

Correct AnswerverifiedShow Answer

Track and field athletes specializing in the 100 meter dash will train their bodies for explosive power when pushing off the starting blocks. Which type of muscle fiber is being isolated during strength training to generate this explosive power?

Correct AnswerverifiedShow Answer

Stretching before a workout is the best way to increase flexibility of muscles.

Correct AnswerverifiedShow Answer

Which type of muscle develops from the mesodermal cells that envelope the developing gastrointestinal tract, viscera, and blood vessels?

Correct AnswerverifiedShow Answer

Somites give rise to the skeletal muscles of the thoracic and abdominal walls as well as the appendages.

Correct AnswerverifiedShow Answer

As skeletal muscle ages, after age 30, which of the following does NOT occur?

Correct AnswerverifiedShow Answer

The transverse (T) tubule is a specialized region of sarcolemma that is located at a neuromuscular junction.

Correct AnswerverifiedShow Answer

Autorhythmicity is the ability to repeatedly generate spontaneous action potentials.

Correct AnswerverifiedTrue

After years of living a sedentary life, you start a couch-to-13.1K training regimen. This change in activity includes daily long distance runs. These distance runs are inducing changes in which muscle fiber types?

Correct AnswerverifiedC

The muscle fibers that are oxidative and resistant to fatigue are the slow oxidative fibers.

Correct AnswerverifiedShow Answer

Identify this organelle of the muscle fiber (cell) labeled A.

Correct AnswerverifiedShow Answer

A bundle (fascicle) of skeletal muscle fibers (cells) is separated from neighboring bundles by perimysium.

Correct AnswerverifiedShow Answer

During an isotonic contraction of a muscle, the muscle shortens while the tension in the muscle increases, as in straightening the legs when rising from a sitting position to a standing position.

Correct AnswerverifiedFalse

Match the connective tissue components of skeletal muscle with the tissues. Match perimysium with the correct tissue type.

Correct AnswerverifiedShow Answer

When examined microscopically, striations are visible in the _____ muscle tissues.

Correct AnswerverifiedShow Answer

Match the connective tissue components of skeletal muscle with the tissues. Identify the description of a motor end plate.

Correct AnswerverifiedShow Answer

Cardiac muscle tissue may be classified as either visceral (single-unit) or multiunit muscle tissue.

Correct AnswerverifiedShow Answer

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C

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False

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