Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 19 - The Cardiovascular System: Blood Vessels - Review Questions: 6

Answer

d) a local increase in pH

Work Step by Step

A local pH change would affect the acid-base balance in the blood. A decrease in oxygen or an increase in carbon dioxide would stimulate dilation because the increased blood flow carries in more oxygen and carries out more carbon dioxide. Histamine is an agent in the inflammatory response in allergies, which stimulates dilation so that harmful substances can be removed and healing agents can enter faster.
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