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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 supplies (supply) the motor innervation of each hemidiaphragm?

1. Vagus nerve (tenth cranial nerve)

2. Phrenic nerve

3. Lower thoracic nerves

4. Glossopharyngeal nerve (ninth cranial nerve)

A. 1 only

B. 2 only

C. 1 and 4 only

D. 2 and 3 only

Summary Introduction

Introduction:

The respiratory system is one of the vital biological systems, which is segregated into the upper and lower respiratory systems. The diaphragm is another vital organ which regulates the inhalation and exhalation processes. This organ makes space for more air to enter the lungs.

Explanation

Explanation for the correct answer:

Option (b) is given as two only. The diaphragm is known to be the primary muscle for ventilation. It is a dome-shaped musculofibrous segregation, situated between the thoracic cavity and the abdominal cavity. Each hemidiaphragm begins from the lumbar vertebrae and the terminal branches of the phrenic nerves supply the primary motor innervation of each hemidiaphragm. Hence, option (b) is the correct answer.

Explanation for the incorrect answers:

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

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