Which of the following is not a characteristic of homeostatic variables?
A.
their values can change
B.
they must remain within a narrow change
C.
they always remain at a fixed value
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Question 2) Imagine the following scernerio: Blood pressure decreases below normal levels. Blood flow to the heart decreases Heart is unable to pump as much blood. Blood pressure decreases even more. This is an example of _____ feedback.
A.
positive
B.
negative
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Question 3) The control center compares input from a receptor with the ideal normal value for a condition called a set point.
Indicate whether the statement is true or false.
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Question 4) This figure illustrates changes in blood pressure when _____ feedback mechanisms are in control.
A.
positive
B.
negative
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Question 5) In reference to the body tempaerature in living organisms, the set point can be defined as the
A.
ideal normal value
B.
current specific value
C.
amount of change that must occur for a condition to return to ideal normal value
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Question 6) This is a sagittal section through the abdominopelvic cavity. What cavity does D represent?
A. visceral peritoneum (covers organs)
B. mesentery
C. parietal peritoneum (lines cavity)
D. retroperitoneal organs
E. peritoneal cavity
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Question 7) This is a sagittal section through the abdominopelvic cavity. What structures does E represent?
A. visceral peritoneum (covers organs)
B. mesentery
C. parietal peritoneum (lines cavity)
D. retroperitoneal organs
E. peritoneal cavity
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Question 8) What branch of physiology would study the effects of sunbathing on the skin?
A. cell physiology
B. systemic physiology
C. regional physiology
D. organ physiology
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Question 9) Which of the following is not a function of the control center within a feedback mechanism?
A.
receives and processes information
B.
controls effectors
C.
establishes a set point
D.
detects a change in the value of a variable
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Question 10) The part of the feedback mechanism that processes information, relates it to other information, and makes a decision of action is the receptor.
Indicate whether the statement is true or false.
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