The nurse is assessing a newly admitted patient who is an 84-year-old woman. The nurse learns that the patient has simultaneously experienced a hip fracture and the exacerbation of her chronic heart failure
What is an example of a bodily function that restores homeostasis by negative feedback when conditions shift out of normal range?
A) Body temperature
B) Pupil dilation
C) Diuresis
D) Blood clotting
Ans: A
Feedback:
Negative feedback mechanisms throughout the body monitor the internal environment and restore homeostasis when conditions shift out of normal range. Body temperature, blood pressure, and acid-base balances are examples of functions regulated by these compensatory mechanisms. Blood clotting in the body involves positive feedback mechanisms. Pupil dilation and diuresis are not modulated by negative feedback mechanisms.
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