Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 49 - The Circulatory System - Review Questions - Apply - Page 1039: 4

Answer

A.

Work Step by Step

Contraction of smooth muscle decreases diameter and increases resistance to flow (A.). B. is wrong since less flow would mean less exchange, and C. is wrong for the same basic reason (less flow). D. is wrong since B. and C. are wrong.
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