Which of the following is an example of a feedback loop in the body

(a) the hypothalamus produces hormones and the pituitary gland releases them

(b) the pancreas can preform endocrine and exocrine functions

(c) one gland causes calcium ions to be released; another gland causes them to be absorbed

(d) the nervous system and the endocrine system can both send messages

The correct option would be option C.

Explanation:

A feedback loop is a mechanism in which a product feeds back to regulate its own production. Most of the hormone feedback loop involves negative feedback. Negative feedback maintains the concentration of hormones within a small range.

When one gland release hormone that causes a product in blood in its required concentration the product itself feeds back and other gland cause them to be absorbed.

Thus, the correct option would be option C.

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