Question 1

The ________ phase of muscle contractions occurs as AChE inactivates ACh and calcium ions are returned to the sarcoplasmic reticulum.

Accepted Answer

A)   myogram
B)   latent period
C)   relaxation
D)   contraction phase

Question 2

A tracing of the muscle's electrical activity is an ________.

Accepted Answer

A)   EOG
B)   EEG
C)   ECG
D)   EMG D

Question 3

In an isotonic contraction, the muscle ________.

Accepted Answer

A)   does not change length, but increases in tension
B)   changes in length and moves the "load"
C)   rapidly resynthesizes ATP
D)   never converts pyruvate to lactic acid

Question 4

The strongest muscle contractions are normally achieved by ________.

Accepted Answer

A)   increasing the stimulus above threshold
B)   increasing the stimulus above the treppe stimulus
C)   recruiting small and medium muscle fibers
D)   increasing stimulation up to the maximal stimulus

Question 5

What controls the force of muscle contraction?

Accepted Answer

A)   treppe
B)   wave summation
C)   multimotor unit recruitment
D)   concentric contractions C

Question 6

Muscle and nerve tissues produce electrical impulses called ________.

Accepted Answer

A)   depolarization
B)   repolarization
C)   neurotransmitters
D)   action potentials

Question 7

Which ion flows into the cell during depolarization?

Accepted Answer

A)   calcium
B)   sodium
C)   protein
D)   potassium

Question 8

What is the major factor controlling how levers work?

Accepted Answer

A)   the difference in the positioning of the effort, load, and fulcrum
B)   the direction of the load is being moved
C)   the structural characteristics of the muscles of the person using the lever
D)   the weight of the load

Question 9

The measurement of power is ________.

Accepted Answer

A)   EMG
B)   EOG
C)   motor unit recruitment
D)   dynamometry

Question 10

Most lever systems in the human body are ________.

Accepted Answer

A)   second class
B)   first class
C)   fourth class
D)   third class

Question 11

Immediately following the arrival of a stimulus at the skeletal muscle cell there is a short period called the ________ period during which the events of excitation-coupling occur.

Accepted Answer

A)   latent
B)   refractory
C)   relaxation
D)   contraction

Question 12

If L=load, F=fulcrum, and AF=applied force, what type of lever system is described as LAFF?

Accepted Answer

A)   third-class lever system
B)   second-class lever system
C)   fourth-class lever system
D)   first-class lever system

Question 13

The main effect of treppe, as the muscle contraction increase in strength, is to ________.

Accepted Answer

A)   increase the myoglobin content
B)   convert glycogen to glucose
C)   tone the muscles
D)   enhance the availability of calcium

Question 14

The warm-up period required of athletes in order to bring their muscles to peak performance is called ________.

Accepted Answer

A)   twitch
B)   treppe
C)   incomplete tetanus
D)   wave summation

Question 15

ATP is used for ________ in muscle contraction.

Accepted Answer

A)   power stroke
B)   the release of calcium from the sarcoplasmic reticulum
C)   binding of the myosin and actin
D)   none of the above

Question 16

A(n)  ________ muscle contraction occurs when the muscle length is relatively constant, but the muscle tension changes.

Accepted Answer

A)   isotonic
B)   complete tetanus
C)   wave summation
D)   isometric

Question 17

What type of muscle contraction occurs while you are holding a book?

Accepted Answer

A)   treppe
B)   myogram
C)   isotonic
D)   isometric

Question 18

What are sensors that are placed on the skin to detect the electrical activity by a muscle?

Accepted Answer

A)   electrodes
B)   action potentials
C)   impulse
D)   none of the above

Question 19

Which type of lever is demonstrated by using scissors?

Accepted Answer

A)   fourth-class lever
B)   first-class lever
C)   second-class lever
D)   third-class lever B

Question 20

Most muscle work is accomplished by ________.

Accepted Answer

A)   treppe
B)   incomplete tetanus
C)   wave summation
D)   complete tetanus

Exam 22: Muscle Physiology

The ________ phase of muscle contractions occurs as AChE inactivates ACh and calcium ions are returned to the sarcoplasmic reticulum.

Correct AnswerverifiedShow Answer

A tracing of the muscle's electrical activity is an ________.

Correct AnswerverifiedD

In an isotonic contraction, the muscle ________.

Correct AnswerverifiedShow Answer

The strongest muscle contractions are normally achieved by ________.

Correct AnswerverifiedShow Answer

What controls the force of muscle contraction?

Correct AnswerverifiedC

Muscle and nerve tissues produce electrical impulses called ________.

Correct AnswerverifiedShow Answer

Which ion flows into the cell during depolarization?

Correct AnswerverifiedShow Answer

What is the major factor controlling how levers work?

Correct AnswerverifiedShow Answer

The measurement of power is ________.

Correct AnswerverifiedShow Answer

Most lever systems in the human body are ________.

Correct AnswerverifiedShow Answer

Immediately following the arrival of a stimulus at the skeletal muscle cell there is a short period called the ________ period during which the events of excitation-coupling occur.

Correct AnswerverifiedShow Answer

If L=load, F=fulcrum, and AF=applied force, what type of lever system is described as LAFF?

Correct AnswerverifiedShow Answer

The main effect of treppe, as the muscle contraction increase in strength, is to ________.

Correct AnswerverifiedShow Answer

The warm-up period required of athletes in order to bring their muscles to peak performance is called ________.

Correct AnswerverifiedShow Answer

ATP is used for ________ in muscle contraction.

Correct AnswerverifiedShow Answer

A(n) ________ muscle contraction occurs when the muscle length is relatively constant, but the muscle tension changes.

Correct AnswerverifiedShow Answer

What type of muscle contraction occurs while you are holding a book?

Correct AnswerverifiedShow Answer

What are sensors that are placed on the skin to detect the electrical activity by a muscle?

Correct AnswerverifiedShow Answer

Which type of lever is demonstrated by using scissors?

Correct AnswerverifiedB

Most muscle work is accomplished by ________.

Correct AnswerverifiedShow Answer

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D

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C

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B

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