Question 1

Energy requirements for smooth muscle contractions are generally higher than those for skeletal muscle contractions.

Accepted Answer

A) True 
 B)False

Question 2

For relaxation to occur,

Accepted Answer

A)  calcium leaves the sarcoplasmic reticulum,and troponin binds calcium and blocks the binding sites on actin.
B)  calcium enters the myofibril,it detaches from myosin,and the binding sites on myosin become inactive.
C)  sarcoplasm calcium levels fall,calcium is removed from troponin,and tropomyosin blocks binding sites on actin.
D)  extracellular calcium levels fall,calcium is pumped into the myofibril,and tropomyosin slides away from actin.E) B) and C)
F) A) and D)

Question 3

The fat and connective tissue that encircle a beef steak form the endomysium.

Accepted Answer

A) True 
 B)False

Question 4

Muscles that are used for precisely controlled movements generally contain large motor units.

Accepted Answer

A) True 
 B)False

Question 5

An end plate potential is an event that involves a gain of

Accepted Answer

A)  positive charge along the inside of the cell membrane,as potassium rapidly enters.
B)  positive charge along the inside of the cell membrane,as sodium rapidly enters.
C)  negative charge along the inside of the cell membrane,as potassium rapidly enters.
D)  negative charge along the inside of the cell membrane,as sodium rapidly enters.E) A) and C)
F) None of the above

Question 6

Deep fascia is also known as muscular fascia;it is composed of dense irregular connective tissue.

Accepted Answer

A) True 
 B)False

Question 7

The most prevalent of skeletal muscle fibers in the body are _____ fibers.

Accepted Answer

A)  slow-twitch
B)  fast-twitch
C)  intermediateD) A) and B)
E) A) and C)

Question 8

One of the most crucial factors in the development of fatigue appears to be a depletion of ATP.

Accepted Answer

A) True 
 B)False

Question 9

______________ muscle fibers have large myoglobin stores,slow contraction velocity,and the highest resistance to fatigue.

Accepted Answer

The answer of ______________ muscle fibers have large myoglobin stores,slow...

Question 10

The _____________ is the innermost connective tissue layer that surrounds each muscle fiber.

Accepted Answer

The answer of The _____________ is the innermost connective tissue...

Question 11

The enzyme _____________ resides in the synaptic cleft and breaks down molecules of ACh.

Accepted Answer

acetylchol...

Question 12

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

Accepted Answer

A) True 
 B)False

Question 13

"Intermediate fiber" is another name for

Accepted Answer

A)  a fast-twitch,glycolytic fiber.
B)  a fast-twitch,oxidative fiber.
C)  a slow-twitch,glycolytic fiber.
D)  a slow-twitch,oxidative fiber.E) A) and D)
F) All of the above

Question 14

A champion weight lifter picks up a pencil.A minute later she picks up a sixty-pound object using the same muscles.What was different about the two movements
 Also,what are the differences (at the cellular and molecular levels)in her arm muscles as compared to those of a weaker,untrained person

Accepted Answer

The movement of the heavier object invol...

Question 15

The type of muscle fibers that are striated,form Y-shaped branches,and are joined by intercalated discs are

Accepted Answer

A)  skeletal.
B)  cardiac.
C)  smooth.
D)  voluntary.
E)  skeletal and voluntary.F) B) and E)
G) C) and D)

Question 16

In a lab,wave summation is demonstrated by increasing the _________ of the stimulus.

Accepted Answer

A)  intensity
B)  frequency
C)  capacitance
D)  warm up timeE) All of the above
F) B) and C)

Question 17

One feature that helps provide fast energy to a muscle cell is the presence of granules containing the complex carbohydrate

Accepted Answer

A)  creatine phosphate.
B)  myoglobin.
C)  glycogen.
D)  nebulin.
E)  hemoglobin.F) B) and C)
G) A) and D)

Question 18

The neurons that stimulate muscle contraction are called _____ neurons.

Accepted Answer

A)  sensory
B)  contractile
C)  inhibitory
D)  motor
E)  associationF) A) and E)
G) C) and D)

Question 19

A sarcomere is defined as the distance from one _____ to the next adjacent ____ .(The same answer fills in both spaces.)

Accepted Answer

A)  Z disc
B)  I band
C)  H zone
D)  A band
E)  M lineF) B) and C)
G) B) and E)

Question 20

In general,fast-twitch fibers generate less power than slow-twitch fibers.

Accepted Answer

A) True 
 B)False

Exam 10: Muscle Tissue

In a lab,wave summation is demonstrated by increasing the _________ of the stimulus.

Correct AnswerverifiedShow Answer

A sarcomere is defined as the distance from one _____ to the next adjacent ____ .(The same answer fills in both spaces.)

Correct AnswerverifiedShow Answer

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

Correct AnswerverifiedShow Answer

A champion weight lifter picks up a pencil.A minute later she picks up a sixty-pound object using the same muscles.What was different about the two movements Also,what are the differences (at the cellular and molecular levels)in her arm muscles as compared to those of a weaker,untrained person

Correct AnswerverifiedThe movement of the heavier object invol...View AnswerShow Answer

In general,fast-twitch fibers generate less power than slow-twitch fibers.

Correct AnswerverifiedShow Answer

The enzyme _____________ resides in the synaptic cleft and breaks down molecules of ACh.

Correct Answerverifiedacetylchol...View AnswerShow Answer

"Intermediate fiber" is another name for

Correct AnswerverifiedShow Answer

One feature that helps provide fast energy to a muscle cell is the presence of granules containing the complex carbohydrate

Correct AnswerverifiedShow Answer

An end plate potential is an event that involves a gain of

Correct AnswerverifiedShow Answer

The _____________ is the innermost connective tissue layer that surrounds each muscle fiber.

Correct AnswerverifiedShow Answer

The most prevalent of skeletal muscle fibers in the body are _____ fibers.

Correct AnswerverifiedShow Answer

Energy requirements for smooth muscle contractions are generally higher than those for skeletal muscle contractions.

Correct AnswerverifiedShow Answer

______________ muscle fibers have large myoglobin stores,slow contraction velocity,and the highest resistance to fatigue.

Correct AnswerverifiedShow Answer

The fat and connective tissue that encircle a beef steak form the endomysium.

Correct AnswerverifiedShow Answer

The type of muscle fibers that are striated,form Y-shaped branches,and are joined by intercalated discs are

Correct AnswerverifiedShow Answer

One of the most crucial factors in the development of fatigue appears to be a depletion of ATP.

Correct AnswerverifiedShow Answer

For relaxation to occur,

Correct AnswerverifiedShow Answer

Deep fascia is also known as muscular fascia;it is composed of dense irregular connective tissue.

Correct AnswerverifiedShow Answer

The neurons that stimulate muscle contraction are called _____ neurons.

Correct AnswerverifiedShow Answer

Muscles that are used for precisely controlled movements generally contain large motor units.

Correct AnswerverifiedShow Answer

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A sarcomere is defined as the distance from one _ to the next adjacent .(The same answer fills in both spaces.)

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The movement of the heavier object invol...
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acetylchol...
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