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Multiple Choice



1

During 60 minutes of submaximal exercise, the body temperature reaches a plateau after 35-45 minutes, this is an example of
A)homeostasis.
B)effector center.
C)steady state.
D)changing internal environment.
2

Changes in arterial blood across time during resting conditions is an example of
A)homeostasis.
B)effector center.
C)steady state.
D)changing gain.
3

The overall goal of a control system is to regulate a physiological variable
A)at or near a constant value.
B)only in one system.
C)at a changing value.
D)only when exercising.
4

The goal of "mechanistic" research is
A)to determine why a specific control system operates.
B)to determine how a specific control system operates.
C)to determine when a specific control system operates.
D)all of the above.
5

The general components of a biological control center are
A)receptor, internal environment and effector.
B)receptor, integrating center and input.
C)input, stimulus and output.
D)receptor, integrating center and effector.
6

Decreasing the original stimulus that triggered the control system is termed
A)positive feedback.
B)negative feedback.
C)set point.
D)gain.
7

The precision with which a control system maintains homeostasis is termed
A)positive feedback.
B)negative feedback.
C)set point.
D)gain.
8

The correction of disturbance and removal of stimulus is carried out by
A)the receptor.
B)the integrating center.
C)the effector.
D)none of the above.
9

An example of the failure of a biological control system is
A)insulin.
B)blood glucose.
C)steady state.
D)none of the above.
10

The assessment of the response needed to correct a disturbance is made by
A)the receptor.
B)the integrating center.
C)the effector.
D)none of the above.
11

The amount of correction needed by a biological control system, divided by the amount of abnormality that exists, is termed
A)negative feedback.
B)regulation.
C)gain.
D)steady state.
12

During heavy exercise or exercise in a hot or humid environment, you may have
A)disturbances in the internal environment.
B)disruption of steady state.
C)rapid responses of control systems.
D)all of the above.
13

Severe disturbances in homeostasis result in fatigue and ultimately
A)an increase in performance.
B)a cessation of exercise.
C)an adjustment of gain.
D)none of the above.





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