Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 34, Endocrine and Reproductive Systems - Assessment - 34.2 Glands of the Endocrine System - Understand Key Concepts/Think Critically - Page 1004: 8

Answer

c.

Work Step by Step

Thyroxine is produced by the thyroid glands. This hormone causes cells found throughout the body to increase their metabolism. These cells increase their activity, utilize greater amounts of energy, and generate more heat. Too much thyroxine cause hyperthyroidism; not enough thyroxine causes hypothyroidism.
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