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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

Solutions

Chapter
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BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

During acute alveolar hyperventilation, the blood

1. Pco 2 increases

2. H 2 CO 3 decreases

3. HCO 3 - increases

4. pH decreases

A. 2 only

B. 4 only

C. 1 and 3 only

D. 2 and 4 only

Summary Introduction

Introduction:

Acute alveolar hyperventilation is defined as a decrease in the partial pressure of carbon dioxide due to excessive ventilation. It is of two types, that is, acute and chronic. In acute alveolar hyperventilation, ventilation increases in proportion to the production of carbon dioxide.

Explanation

Explanation for the correct answer:

Option (d) states that carbonic acid as well as pH (potential of hydrogen) decreases. During hyperventilation, there is a rapid reduction in carbon dioxide as the rate of exhalation is higher than that of inhalation. Acute alveolar hyperventilation is defined as a decrease in the partial pressure of carbon dioxide due to excessive ventilation. This results in a decrease in H2CO3. Hence, option (d) is the correct option.

Explanation for the incorrect answers:

Option (a) states that only carbonic acid decreases. pH decreases along with a decrease in carbonic acid

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