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Question 13 • 2026-2027 EDGE Human Anatomy and Physiology A

Which is an example of the body maintaining homeostasis using a negative feedback loop?

Answer

During a woman’s menstruation cycle, the hormone estrogen triggers glands in the brain to release hormones that cause the ovaries to release more estrogen.

When a cut occurs on a person’s skin, the body causes more and more platelets to accumulate in the blood in that region, causing a clot.

During childbirth, a woman’s body releases hormones to promote the process and to increase contractions until the child is born.

When a person is losing balance, the body senses the position of the head and sends signals to keep balance.

Explanation

A negative feedback loop detects a change and triggers a response that counteracts it, helping return the body to a stable state. When a person loses balance, the body senses the head’s position and sends signals that correct posture and restore balance. The other examples increase the process that is already happening, which is characteristic of positive feedback.

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