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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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Chapter
Section
BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

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

When metabolic acidosis is present, the patient's blood

1. HCO 3 - is higher than expected for a particular P CO 2

2. pH is lower than expected for a particular P CO 2

3. HCO 3 - is lower than expected for a particular P CO 2

4. pH is higher than expected for a particular P CO 2

A. 1 only

B. 2 only

C. 3 and 4 only

D. 2 and 3 only

Summary Introduction

Introduction:

A condition in which there is a high amount of acid accumulation in the body is known as metabolic acidosis. This causes a decrease in the pH of the blood. The kidneys stop working efficiently and are unable to remove a sufficient amount of acid from the body.

Explanation

Explanation for the correct answer:

Option (D) is that the pH is lower than expected (2) and the level of bicarbonate ions is lower than expected for a particular partial pressure of carbon dioxide (3). Metabolic acidosis is defined as an increase in the level of acid accumulation in the body as well as the presence of low serum bicarbonate concentration. It can occur by three mechanisms, which are an increased level of bicarbonate ions, increased acid production, and decreased renal acid excretion. This increases acid concentration, thus lowering the pH. Hence, option (D) is the correct option.

Explanation for the incorrect answer:

Option (A) is that the patient’s blood has a higher level of bicarbonate ions (HCO3) than expected (1) for a particular partial pressure of carbon dioxide (Pco2)

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