The nurse tells the nursing students that negative and positive feedback mechanisms influence hormonal blood levels. Based on this information, what occurs in a negative feedback system or loop?
1 . Ceases hormone secretion
2 . Inhibits glandular response
3 . Increases hormone production
4 . Continues and intensifies glandular response
A) 1, 2
B) 1, 4
C) 2, 3
D) 3, 4
A
Feedback:
Negative feedback receptors require close monitoring by the cells of the body to maintain the desired amount of hormones. After the desired effect is achieved, information is sent to the gland to halt secretion of the hormone. This is a negative feedback system or negative feedback loop, because the body has again achieved homeostasis. This situation will now cause an inhibited glandular response because the previous imbalance has been resolved. A positive feedback system or loop can also occur. The result is an increase in hormone production. The desired effect (response) by the body does not cause the hormone secretion to cease (as in the negative feedback system) but allows it to continue and intensify.
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