Question 1

Endocrine signaling involves the release of _________ into the bloodstream.

Accepted Answer

A)   heat shock proteins
B)   neurotransmitters
C)   hormones
D)   transcription factors

Question 2

The term homeostasis is defined as

Accepted Answer

A)   a constant metabolic demand placed upon the body.
B)   the maintenance of a constant internal environment.
C)   a low metabolic rate.
D)   a change within the internal environment.

Question 3

The gain of a biological control system can be thought of as the

Accepted Answer

A)   amount of amplification of the system or the precision with which the control system maintains homeostasis.
B)   ratio of the amount of abnormality to the amount of correction needed to maintain a constant internal environment (i.e., amount abnormality/amount of correction needed) .
C)   positive feedback needed to maintain homeostasis.
D)   stimulus that triggers the biological control system to bring the internal environment back to normal.

Question 4

The effectors in the response to increased body temperature include

Accepted Answer

A)   cutaneous blood vessels and sweat glands.
B)   cutaneous blood vessels and skeletal muscle.
C)   baroreceptors.
D)   stretch receptors.

Question 5

A chemical messenger is released from one cell that stimulates nearby cells is an example of

Accepted Answer

A)   autocrine signaling.
B)   endocrine signaling.
C)   juxtacrine signaling.
D)   paracrine signaling.

Question 6

In negative feedback, the response of the system is

Accepted Answer

A)   to increase the gain of the receptor.
B)   to modify the receptor's response to the stimulus.
C)   opposite to that of the stimulus.
D)   to enhance the stimulus.

Question 7

Stress proteins that are manufactured by cells in response to exercise

Accepted Answer

A)   can lead to an increased production of free radicals.
B)   can lead to further disruptions in homeostasis.
C)   can lead to an increased degree of cellular injury.
D)   can help to repair damage caused by free radicals.

Question 8

The general components of a biological control system are the

Accepted Answer

A)   receptor, control center, and response.
B)   receptor, control center, and effector.
C)   effector, remote control, and stimulus.
D)   receptor and integrating center.

Question 9

Physiologists use the term steady state to denote

Accepted Answer

A)   a steady and unchanging level of a physiological variable.
B)   a completely normal external environment.
C)   a changing internal environment.
D)   an increase in body heat storage.

Question 10

Most control systems of the body operate via

Accepted Answer

A)   positive feedback.
B)   low-gain receptors.
C)   negative feedback.
D)   feed forward mechanisms.

Question 11

The precision with which a control system maintains homeostasis is termed

Accepted Answer

A)   positive feedback.
B)   negative feedback.
C)   set point.
D)   gain.

Question 12

Which of the following is an example of positive feedback?

Accepted Answer

A)   regulation of blood glucose
B)   regulation of body temperature
C)   labor contractions during childbirth
D)   the cellular stress protein response C

Question 13

Which of the following would occur in response to elevated blood glucose to maintain homeostasis?

Accepted Answer

A)   decreased insulin secretion from the pancreas
B)   increased uptake of glucose by cells
C)   continued elevation of blood glucose
D)   all of the above B

Question 14

During 60 minutes of constant-load submaximal exercise, the body temperature reaches a plateau after 35-45 minutes. This is an example of

Accepted Answer

A)   homeostasis.
B)   effector.
C)   steady state.
D)   changing internal environment.

Question 15

Because of complex control systems, the body always maintains homeostasis, even during exercise.

Accepted Answer

A) True 
 B)False

Question 16

In protein synthesis, the formation of mRNA is called

Accepted Answer

A)   transcription.
B)   translation. A

Question 17

Translation is the production of a protein from mRNA at the

Accepted Answer

A)   nucleus.
B)   ribosome.
C)   mitochondria.
D)   Golgi apparatus.

Question 18

A series of interconnected components that serve to maintain a physical or chemical parameter of the body near a constant value is

Accepted Answer

A)   homeostasis.
B)   steady state.
C)   a biological control system.
D)   an organ system.

Exam 3: Control of the Internal Environment

Endocrine signaling involves the release of _________ into the bloodstream.

Correct Answer
verified

The term homeostasis is defined as

Correct Answer
verified

The gain of a biological control system can be thought of as the

Correct Answer
verified

The effectors in the response to increased body temperature include

Correct Answer
verified

A chemical messenger is released from one cell that stimulates nearby cells is an example of

Correct Answer
verified

In negative feedback, the response of the system is

Correct Answer
verified

Stress proteins that are manufactured by cells in response to exercise

Correct Answer
verified

The general components of a biological control system are the

Correct Answer
verified

Physiologists use the term steady state to denote

Correct Answer
verified

Most control systems of the body operate via

Correct Answer
verified

The precision with which a control system maintains homeostasis is termed

Correct Answer
verified

Which of the following is an example of positive feedback?

Correct Answer
verified
C

Which of the following would occur in response to elevated blood glucose to maintain homeostasis?

Correct Answer
verified
B

During 60 minutes of constant-load submaximal exercise, the body temperature reaches a plateau after 35-45 minutes. This is an example of

Correct Answer
verified

Because of complex control systems, the body always maintains homeostasis, even during exercise.

Correct Answer
verified

In protein synthesis, the formation of mRNA is called

Correct Answer
verified
A

Translation is the production of a protein from mRNA at the

Correct Answer
verified

A series of interconnected components that serve to maintain a physical or chemical parameter of the body near a constant value is

Correct Answer
verified

Exam 3: Control of the Internal Environment

Endocrine signaling involves the release of _________ into the bloodstream.

Correct AnswerverifiedShow Answer

The term homeostasis is defined as

Correct AnswerverifiedShow Answer

The gain of a biological control system can be thought of as the

Correct AnswerverifiedShow Answer

The effectors in the response to increased body temperature include

Correct AnswerverifiedShow Answer

A chemical messenger is released from one cell that stimulates nearby cells is an example of

Correct AnswerverifiedShow Answer

In negative feedback, the response of the system is

Correct AnswerverifiedShow Answer

Stress proteins that are manufactured by cells in response to exercise

Correct AnswerverifiedShow Answer

The general components of a biological control system are the

Correct AnswerverifiedShow Answer

Physiologists use the term steady state to denote

Correct AnswerverifiedShow Answer

Most control systems of the body operate via

Correct AnswerverifiedShow Answer

The precision with which a control system maintains homeostasis is termed

Correct AnswerverifiedShow Answer

Which of the following is an example of positive feedback?

Correct AnswerverifiedC

Which of the following would occur in response to elevated blood glucose to maintain homeostasis?

Correct AnswerverifiedB

During 60 minutes of constant-load submaximal exercise, the body temperature reaches a plateau after 35-45 minutes. This is an example of

Correct AnswerverifiedShow Answer

Because of complex control systems, the body always maintains homeostasis, even during exercise.

Correct AnswerverifiedShow Answer

In protein synthesis, the formation of mRNA is called

Correct AnswerverifiedA

Translation is the production of a protein from mRNA at the

Correct AnswerverifiedShow Answer

A series of interconnected components that serve to maintain a physical or chemical parameter of the body near a constant value is

Correct AnswerverifiedShow Answer

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C

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B

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A

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