Question 1

Describe two ways in which the lack of ATP production results in rigor mortis.

Accepted Answer

Following the death of an individual, AT...

Question 2

Immediately following the arrival of the stimulus at a skeletal muscle cell there is a shortperiod called the ________ period during which the neurotransmitter is released by exocytosis, diffuses across the synaptic cleft, and binds to its receptors.

Accepted Answer

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

Question 3

When a sarcomere contracts and thin filaments move over thick filaments you would expect to see ________.

Accepted Answer

A)   the A band to appear darker
B)   the I bands to appear wider
C)   the H zone to appear wider
D)   the I bands to appear smaller

Question 4

Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics ofextensibility?

Accepted Answer

A)   potassium (K+)  leak channels
B)   acetylcholine receptors in the motor end plate
C)   elastic (titin)  filaments
D)   thick (myosin)  filaments

Question 5

Peristalsis is characteristic of smooth muscle.

Accepted Answer

A) True 
 B)False

Question 6

A potential benefit of recruiting slow oxidative fibers for contraction before recruiting fast oxidative and fast glycolytic fibers might be ________.

Accepted Answer

A)   recruiting slow oxidative fibers early helps to tire them out first so that they won't interfere with the more powerful contractions of fast glycolytic fibers
B)   because they are slower to respond, slow oxidative fibers must be stimulated first in order to contract simultaneously with the faster fibers
C)   this will help to allow for fine control with delicate contractile force with a small stimulus
D)   there is little to no benefit from recruiting slow oxidative fibers first and therefore it is in fact fast glycolytic fibers that will be recruited first

Question 7

One of the functions of skeletal muscle contraction is production of heat.

Accepted Answer

A) True 
 B)False

Question 8

The contractile units of skeletal muscles are ________.

Accepted Answer

A)   mitochondria
B)   T tubules
C)   microtubules
D)   myofibrils

Question 9

When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the Abands do not diminish in length.

Accepted Answer

A) True 
 B)False

Question 10

What is the most distinguishing characteristic of muscle tissue?

Accepted Answer

A)   the ability to respond to nervous stimulation
B)   its cells' in ability to reproduce by mitosis
C)   the ability to transform chemical energy into mechanical energy to move the body
D)   it is composed of multiple cells working together

Question 11

Although there are no sarcomeres, smooth muscle still possesses thick and thin filaments.

Accepted Answer

A) True 
 B)False

Question 12

Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics ofcontractility?

Accepted Answer

A)   potassium (K+)  leak channels
B)   voltage gated sodium channels
C)   thick (myosin)  filaments
D)   elastic (titin)  filaments

Question 13

Rigor mortis occurs because ________.

Accepted Answer

A)   sodium ions leak into the muscle causing continued contractions
B)   proteins are beginning to break down, thus preventing a flow of calcium ions
C)   the cells are dead
D)   no ATP is available to release attached actin and myosin molecules

Question 14

Which muscle cells have the greatest ability to regenerate?

Accepted Answer

A)   no muscle can regenerate
B)   smooth
C)   cardiac
D)   skeletal

Question 15

Myasthenia gravis is a disease that is believed to be caused by autoimmune disorder, resulting in the loss of ACh receptors at the motor end plate of muscle fibers. Which of the following islikely to be a symptom of myasthenia gravis?

Accepted Answer

A)   weakness of muscle
B)   coma and loss of voluntary muscle movement
C)   dehydration with headache
D)   seizures and uncontrollable muscle movement

Question 16

A patient is admitted for electroconvulsive treatment (ECT). The physician orders the neuromuscular blocking agent succinylcholine to reduce trauma by relaxing skeletal muscles. Explain the process ofmuscle contraction and how a neuromuscular blocking agent such as succinylcholine would interfere with muscle contraction.

Accepted Answer

Muscle contraction begins with a stimulu...

Question 17

If a muscle fiber were to suddenly and permanently stop producing ATP the fiber would no longer be able to actively transport calcium out of the cytoplasm (sarcoplasm)  and theintracellular calcium concentration would rise. Which of the following would you expect to ha ppen?

Accepted Answer

A)   Myosin would be able to bind to the exposed binding sites on thin filaments but it would not be able to detach.
B)   Calcium would be transported to the sarcoplasmic reticulum therefore contractions would cease.
C)   No change would occur in a muscle that was relaxed to begin with.
D)   The fiber would twitch uncontrollably due to excessive calcium bound to troponin.

Question 18

What ultimately stops muscle stimulation when the motor neuron ceases firing?

Accepted Answer

The ultimate switch is the enzyme acetyl...

Question 19

During vigorous exercise, there may be insufficient oxygen available to completely break down pyruvic acid for energy. As a result, the pyruvic acid is converted to ________.

Accepted Answer

A)   hydrochloric acid
B)   a strong base
C)   stearic acid
D)   lactic acid

Question 20

What is the primary function of wave summation?

Accepted Answer

A)   prevent muscle fatigue
B)   increase muscle tension
C)   produce smooth, continuous muscle contract ion
D)   prevent muscle relaxation

Exam 9: Muscles and Muscle Tissue

Correct Answer
verified
Muscle contraction begins with a stimulu...
View Answer

Rigor mortis occurs because ________.

Correct Answer
verified

What is the most distinguishing characteristic of muscle tissue?

Correct Answer
verified

What ultimately stops muscle stimulation when the motor neuron ceases firing?

Correct Answer
verified
The ultimate switch is the enzyme acetyl...
View Answer

A potential benefit of recruiting slow oxidative fibers for contraction before recruiting fast oxidative and fast glycolytic fibers might be ________.

Correct Answer
verified

When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the Abands do not diminish in length.

Correct Answer
verified

Immediately following the arrival of the stimulus at a skeletal muscle cell there is a shortperiod called the ________ period during which the neurotransmitter is released by exocytosis, diffuses across the synaptic cleft, and binds to its receptors.

Correct Answer
verified

Describe two ways in which the lack of ATP production results in rigor mortis.

Correct Answer
verified
Following the death of an individual, AT...
View Answer

The contractile units of skeletal muscles are ________.

Correct Answer
verified

If a muscle fiber were to suddenly and permanently stop producing ATP the fiber would no longer be able to actively transport calcium out of the cytoplasm (sarcoplasm) and theintracellular calcium concentration would rise. Which of the following would you expect to ha ppen?

Correct Answer
verified

Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics ofcontractility?

Correct Answer
verified

What is the primary function of wave summation?

Correct Answer
verified

Although there are no sarcomeres, smooth muscle still possesses thick and thin filaments.

Correct Answer
verified

When a sarcomere contracts and thin filaments move over thick filaments you would expect to see ________.

Correct Answer
verified

Which muscle cells have the greatest ability to regenerate?

Correct Answer
verified

One of the functions of skeletal muscle contraction is production of heat.

Correct Answer
verified

Myasthenia gravis is a disease that is believed to be caused by autoimmune disorder, resulting in the loss of ACh receptors at the motor end plate of muscle fibers. Which of the following islikely to be a symptom of myasthenia gravis?

Correct Answer
verified

During vigorous exercise, there may be insufficient oxygen available to completely break down pyruvic acid for energy. As a result, the pyruvic acid is converted to ________.

Correct Answer
verified

Peristalsis is characteristic of smooth muscle.

Correct Answer
verified

Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics ofextensibility?

Correct Answer
verified

Exam 9: Muscles and Muscle Tissue

Correct AnswerverifiedMuscle contraction begins with a stimulu...View AnswerShow Answer

Rigor mortis occurs because ________.

Correct AnswerverifiedShow Answer

What is the most distinguishing characteristic of muscle tissue?

Correct AnswerverifiedShow Answer

What ultimately stops muscle stimulation when the motor neuron ceases firing?

Correct AnswerverifiedThe ultimate switch is the enzyme acetyl...View AnswerShow Answer

A potential benefit of recruiting slow oxidative fibers for contraction before recruiting fast oxidative and fast glycolytic fibers might be ________.

Correct AnswerverifiedShow Answer

When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the Abands do not diminish in length.

Correct AnswerverifiedShow Answer

Immediately following the arrival of the stimulus at a skeletal muscle cell there is a shortperiod called the ________ period during which the neurotransmitter is released by exocytosis, diffuses across the synaptic cleft, and binds to its receptors.

Correct AnswerverifiedShow Answer

Describe two ways in which the lack of ATP production results in rigor mortis.

Correct AnswerverifiedFollowing the death of an individual, AT...View AnswerShow Answer

The contractile units of skeletal muscles are ________.

Correct AnswerverifiedShow Answer

If a muscle fiber were to suddenly and permanently stop producing ATP the fiber would no longer be able to actively transport calcium out of the cytoplasm (sarcoplasm) and theintracellular calcium concentration would rise. Which of the following would you expect to ha ppen?

Correct AnswerverifiedShow Answer

Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics ofcontractility?

Correct AnswerverifiedShow Answer

What is the primary function of wave summation?

Correct AnswerverifiedShow Answer

Although there are no sarcomeres, smooth muscle still possesses thick and thin filaments.

Correct AnswerverifiedShow Answer

When a sarcomere contracts and thin filaments move over thick filaments you would expect to see ________.

Correct AnswerverifiedShow Answer

Which muscle cells have the greatest ability to regenerate?

Correct AnswerverifiedShow Answer

One of the functions of skeletal muscle contraction is production of heat.

Correct AnswerverifiedShow Answer

Myasthenia gravis is a disease that is believed to be caused by autoimmune disorder, resulting in the loss of ACh receptors at the motor end plate of muscle fibers. Which of the following islikely to be a symptom of myasthenia gravis?

Correct AnswerverifiedShow Answer

During vigorous exercise, there may be insufficient oxygen available to completely break down pyruvic acid for energy. As a result, the pyruvic acid is converted to ________.

Correct AnswerverifiedShow Answer

Peristalsis is characteristic of smooth muscle.

Correct AnswerverifiedShow Answer

Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics ofextensibility?

Correct AnswerverifiedShow Answer

Correct Answer
verified
Muscle contraction begins with a stimulu...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The ultimate switch is the enzyme acetyl...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Following the death of an individual, AT...
View 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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified