Chapter 1—Introduction to Physiology and Homeostasis
17. Which of the following is not an example of negative feedback?
|
a. |
A low grade on an exam causes a student to study harder for the next exam. |
|
b. |
A small stone rolls down a hill and starts an avalanche. |
|
c. |
A person goes to eat in the cafeteria when he/she gets hungry. |
|
d. |
You change a flat tire so you can continue on a journey in your car. |
|
e. |
A person's body shivers after the person falls into a cold river. |
18. Evaporation of sweat cooling the body is an example of
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a. |
negative feedback |
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b. |
positive feedback |
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c. |
a feedforward mechanism |
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d. |
an intrinsic (local) control mechanism |
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e. |
autoregulation |
19. The two major regulatory systems in the body are
|
a. |
nervous and respiratory |
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b. |
nervous and endocrine |
|
c. |
endocrine and respiratory |
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d. |
endocrine and lymphatic |
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e. |
circulatory and endocrine |
20. Calcium is stored mainly in the ____ system.
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a. |
digestive |
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b. |
endocrine |
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c. |
integumentary |
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d. |
muscular |
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e. |
skeletal |
21. If a letter in the alphabet is equated to a cell, then which of the following would be most like an organ?
|
a. |
two paragraphs |
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b. |
a paragraph |
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c. |
a word |
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d. |
a sentence |
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e. |
two sentences |
22. Identify the correct statement(s) about stem cells.
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a. |
They are undifferentiated embryonic cells. |
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b. |
They may reproduce many times. |
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c. |
Their daughter cells may differentiate into a number of different specialized cell types. |
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d. |
All of the above. |
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e. |
None of the above. |
23. Which of the following is a feedforward phenomenon?
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a. |
Increasing the amount of insulin secreted before nutrients in food enter the blood. |
|
b. |
Shivering in response to having cold air around the body. |
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c. |
Sweating after being in a sauna for 10 minutes. |
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d. |
Eating a doughnut because you are hungry. |
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e. |
Jerking your hand away from a hot stove after you touch it. |
24. The statement “Things are going from bad to worse” would be most closely related to
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a. |
feedforward |
d. |
homeostasis |
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b. |
positive feedback |
e. |
regulatory control |
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c. |
negative feedback |
25. The ability of the brain to maintain optimum blood pressure by speeding up or slowing down the heart is an example of
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a. |
intrinsic control |
d. |
Both a and c |
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b. |
extrinsic control |
e. |
Both b and c |
|
c. |
positive feedback |
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Solution: Chapter 1—Introduction to Physiology and Homeostasis