Biology 2010 Student Edition

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

Chapter 7, Cell Structure and Function - 7.2 - Cell Structure - 7.2 Assessment - Page 205: 5c


If a membrane was permeable, then many unwanted substances could enter the cell.

Work Step by Step

A cell membrane is selectively permeable to keep some substances out of the cell. This could be because the substance is toxic or it is too large. If the cell membrane was not selectively permeable, slightly unideal conditions may cause cell death.
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