Biology 2010 Student Edition

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

Chapter 34, Endocrine and Reproductive Systems - 34.1 - The Endocrine System - 34.1 Assessment - Page 981: 2a

Answer

Steroid hormones enter freely through the plasma membrane of a cell. Once inside the cell, the hormone binds to a receptor. The hormone-receptor complex then enters the cell's nucleus and either turns on or turns off certain genes.

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