Which of the following is an example of positive feedback in the body?

A. An increase in the depth of respiration in response to an increase in body temperature.
B. Insulin secreted in response to an increase in blood glucose levels.
C. A damaged blood vessel causing platelets to secrete substances that activate more platelets.
D. Sweat glands opening in response to an increase in body temperature.



Answer :

Final answer:

Positive feedback in the body amplifies a change, pushing levels away from normal. It is exemplified by processes like blood clotting and uterine contractions during childbirth.


Explanation:

Positive feedback in the body is when a response to an event increases the likelihood of the event to continue. An example of positive feedback is blood clotting, where the activation of one clotting factor leads to the activation of the next factor until a clot is achieved. Another example is uterine contractions during childbirth, where the hormone oxytocin stimulates more contractions until childbirth occurs.


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