Anatomy & Physiology: The Unity of Form and Function, 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073403717
ISBN 13: 978-0-07340-371-7

Chapter 3 - Section 3.2 - Study Guide - Assess Your Learning Outcomes - Page 109: 1

Answer

The plasma membrane is primarily composed of a phospholipid bilayer, with the heads facing outwards and the tails facing inwards.

Work Step by Step

The phospholipid bilayer of the plasma membrane is arranged so that the hydrophilic phosphate heads are facing out (where the water is) and the hydrophobic fatty tails are facing inwards.
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