Question 1

The increase in muscle tension that occurs with an increase in the intensity (voltage)  of a stimulus is called

Accepted Answer

A)   recruitment.
B)   tone.
C)   wave summation.
D)   incomplete tetany.

Question 2

A term that describes the change in muscle following a lack of exercise is

Accepted Answer

A)   proliferation.
B)   hypertrophy.
C)   convergence.
D)   atrophy.
E)   myofascia.

Question 3

Smooth muscle tissue is found in the organs of the digestive tract, the walls of blood vessels, and the iris.

Accepted Answer

A) True 
 B)False

Question 4

The neurons that stimulate muscle contraction are called ________ neurons.

Accepted Answer

A)   sensory
B)   contractile
C)   inhibitory
D)   motor
E)   association

Question 5

During aging, muscle is often replaced by dense connective tissue, a process called ________.

Accepted Answer

The answer of During aging, muscle is often replaced by...

Question 6

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 7

During skeletal muscle fiber contraction, the I bands and H zones narrow.

Accepted Answer

A) True 
 B)False

Question 8

The number of satellite cells in skeletal muscle steadily decreases with age.

Accepted Answer

A) True 
 B)False

Question 9

During muscle contraction, myosin heads attach to actin and thereby form connections called ________.

Accepted Answer

The answer of During muscle contraction, myosin heads attach to...

Question 10

Consider the difference between lifting a light pad of paper versus a heavy textbook. The primary way the level of force of muscle contraction is controlled is by

Accepted Answer

A)   recruiting a different number of motor units.
B)   activating different regions of the muscle.
C)   activating the motor units at a different frequency.
D)   altering the number of crossbridges each individual fiber uses.

Question 11

Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells.

Accepted Answer

A) True 
 B)False

Question 12

To initiate a smooth muscle cell contraction, calcium enters the cell and binds to

Accepted Answer

A)   troponin, which then activates myosin light-chain kinase.
B)   calmodulin, which then binds to and activates myosin light-chain kinase.
C)   a myosin head, which then activates calmodulin.
D)   myosin light-chain kinase, which then hydrolyzes ATP.
E)   a phosphatase, which then removes the tropomyosin blockade.

Question 13

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

Accepted Answer

A)   intensity
B)   frequency
C)   capacitance
D)   warm up time

Question 14

Increased phosphate ion concentration is believed to contribute to fatigue by interfering with

Accepted Answer

A)   calcium release from the sarcoplasmic reticulum.
B)   levels of available ATP to provide energy for contraction.
C)   phosphate release by myosin heads during crossbridge cycling.
D)   ACh release by synaptic knobs of motor neurons.

Exam 10: Muscle Tissue

Increased phosphate ion concentration is believed to contribute to fatigue by interfering with

Correct Answer
verified

During skeletal muscle fiber contraction, the I bands and H zones narrow.

Correct Answer
verified

Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells.

Correct Answer
verified

Consider the difference between lifting a light pad of paper versus a heavy textbook. The primary way the level of force of muscle contraction is controlled is by

Correct Answer
verified

The number of satellite cells in skeletal muscle steadily decreases with age.

Correct Answer
verified

To initiate a smooth muscle cell contraction, calcium enters the cell and binds to

Correct Answer
verified

Smooth muscle tissue is found in the organs of the digestive tract, the walls of blood vessels, and the iris.

Correct Answer
verified

Correct Answer
verified
The movement of the heavier object invol...
View Answer

A term that describes the change in muscle following a lack of exercise is

Correct Answer
verified

The increase in muscle tension that occurs with an increase in the intensity (voltage) of a stimulus is called

Correct Answer
verified

During muscle contraction, myosin heads attach to actin and thereby form connections called ________.

Correct Answer
verified

The neurons that stimulate muscle contraction are called ________ neurons.

Correct Answer
verified

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

Correct Answer
verified

During aging, muscle is often replaced by dense connective tissue, a process called ________.

Correct Answer
verified

Exam 10: Muscle Tissue

Increased phosphate ion concentration is believed to contribute to fatigue by interfering with

Correct AnswerverifiedShow Answer

During skeletal muscle fiber contraction, the I bands and H zones narrow.

Correct AnswerverifiedShow Answer

Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells.

Correct AnswerverifiedShow Answer

Consider the difference between lifting a light pad of paper versus a heavy textbook. The primary way the level of force of muscle contraction is controlled is by

Correct AnswerverifiedShow Answer

The number of satellite cells in skeletal muscle steadily decreases with age.

Correct AnswerverifiedShow Answer

To initiate a smooth muscle cell contraction, calcium enters the cell and binds to

Correct AnswerverifiedShow Answer

Smooth muscle tissue is found in the organs of the digestive tract, the walls of blood vessels, and the iris.

Correct AnswerverifiedShow Answer

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

A term that describes the change in muscle following a lack of exercise is

Correct AnswerverifiedShow Answer

The increase in muscle tension that occurs with an increase in the intensity (voltage) of a stimulus is called

Correct AnswerverifiedShow Answer

During muscle contraction, myosin heads attach to actin and thereby form connections called ________.

Correct AnswerverifiedShow Answer

The neurons that stimulate muscle contraction are called ________ neurons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

During aging, muscle is often replaced by dense connective tissue, a process called ________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The movement of the heavier object invol...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified