Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 1 - The Human Body: An Orientation - Review Questions - Critical Thinking and Clinical Application Questions - Page 22: 4

Answer

This is an example of a negative feedback mechanism.

Work Step by Step

The low calcium levels in his blood act as the initial stimulus that prompts the release of PTH. Resulting from this increase in PTH is increased blood calcium levels. The body stops producing PTH once calcium levels are back in equilibrium.
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