Which of the following describes a negative feedback loop?
A. When the heart rate is too high, the body releases hormones that continually increase the heart rate higher.
B. When a pregnant woman is in labor, the body releases hormones that increase the intensity of contractions, which then increases the secretion of the same hormones.
C. When blood sugar concentration is above normal, the endocrine system releases hormones that lower the blood sugar concentration until it reaches a normal level, and the release of the hormones slows.
D. When a person is jogging, the body releases hormones that continually decrease the rate of oxygen supply to the legs.
Answers
Answer:
Option C is correct
Explanation:
Negative feedback is a mechanism through which our body activates process in our body that reduces or reverses the disturbance occurring that are not suitable for normal body condition (called homeostasis).
Option A is incorrect because here the hormone that body is releasing, in response to the higher heart rate, further increases the heart rate. thus there is no reversal in disturbance. that means it is not a negative feedback.
Option B is incorrect because here again the response, that is again a hormone, is not a negative feedback as it further increases the contractions.
Option C is correct because here the body reacts to the increased blood sugar level by secreting a hormone that decreases the sugar's concentration. here the response is to reverse the disturbance. it is negative feedback.
Option D is incorrect because as we jog or do any other physical activity, oxygen level decreases in our blood. here in response to this body is secreting hormone that further decreases its level. thus is is not a negative feedback.
PS: i hope this satisfies your query. Good luck!
Answer:
c
Explanation: