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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

Which of the following is (are) released when the sympathetic nerve fibers are stimulated?

1. Norepinephrine

2. Propranolol

3. Acetylcholine

4. Epinephrine

A. 1 only

B. 2 only

C. 1 and 4 only

D. 2, 3 and 4 only

Summary Introduction

Introduction:

The ANS, which stands for autonomic nervous system, is known to be the section of the nervous system which stimulates many important functions in the body, including the working of the cardiac muscle, glands, and smooth muscles. This region of the nervous system is segregated into two divisions, namely parasympathetic and sympathetic.

Explanation

Explanation for the correct answer:

Option (c) is given as 1 and 4 only. The sympathetic nervous system is responsible for accelerating the heart rate, contracting the blood vessels, and relaxing the bronchial smooth muscles. It also elevates the blood pressure. When this division is regulated, epinephrine and norepinephrine are produced. Hence, option (b) is the correct answer.

Explanation for the incorrect answer:

Option (a) is given as 1 only...

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