If someone speaks too loudly into a microphone, a public address system will sometimes produce a loud whistle of amplified feedback.
Explain whether this is an example of negative or positive feedback, and explain how the microphone, control box, and speaker of the system serve as the different components of a feedback loop.
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Question 2) In the positive feedback mechanism governing breastfeeding, the mammary glands of the breast serve as the
A. control center.B. receptor.C. effector.D. set point.
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Question 3) Disease is often considered the result of
A. negative feedback.B. failure of homeostatic systems.C. maintenance of set point.D. feedback loops.
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Question 4) If your body temperature starts to decline, your body responds by exciting skeletal muscles so that you shiver and your temperature returns to normal. This is an example of negative feedback.
Indicate whether this statement is true or false.
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Question 5) If carbon dioxide levels rise in the body, negative feedback mechanisms will trigger
A. an increase in breathing so that carbon dioxide levels decline to the set point.
B. an increase in breathing so that carbon dioxide levels rise further above set point.
C. a decrease in breathing so that carbon dioxide levels rise to the set point.
D. a decrease in breathing so that carbon dioxide levels decline below set point.
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Question 6) The reinforcement of a stimulus so that a climax is reached is known as ____________.
Fill in the blank with correct word.
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Question 7) Define the term negative feedback.
What will be an ideal response?
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Question 8) The normal level at which a physiological variable is maintainied is known as its
A. stimulus.B. control center.C. negative feedback.D. set point.E. effector.
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Question 9) The central nervous system acts as the control center for the regulation of blood calcium and blood glucose.
Indicate whether this statement is true or false.
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Question 10) Which of the following choices places the components of a homeostatic control system in proper order?
A. Effector, control center, stimulus, receptor B. Stimulus, receptor, control center, effector C. Receptor, effector, control center, stimulus D. Stimulus, control center, effector, receptor E. Receptor, control center, stimulus, effector
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