CONNECT ACCESS FOR BIOL 01204 <C>
CONNECT ACCESS FOR BIOL 01204 <C>
12th Edition
ISBN: 9781264443123
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 43, Problem 1S
Summary Introduction

To determine:

How does the body sense the change, when pH falls too low, how does the breathing rate change, and how does this increase pH.

Introduction:

The sensory receptors detect the external and internal stimuli, and in response to the stimuli send impulses to the brain. The sensory receptors, which are responsible for determining the pH of the blood and cerebrospinal fluid, are chemoreceptors.

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Blood pH and cerebrospinal fluid pH are affected by carbon dioxide content. This enables the organism to sense a disturbance in gas levels as O the medulla oblongata monitors pH and uses this measure to control breathing O the brain alters the pH of the cerebrospinal fluid to force the animal to retain more or less carbon dioxide the lungs sense changes in oxygen concentration, which causes the medulla oblongata to speed up or slow breathing the medulla oblongata directly monitors blood oxygen levels and causes breathing changes accordingly O the brain directly measures and monitors carbon dioxide and causes breathing changes accordingly
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