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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

Case 1

What stimulates the medulla to increase ventilation as an individual continues to ascend a mountain?

Summary Introduction

To review:

The things that stimulate the medulla to increase ventilation as an individual continues to ascend a mountain.

Introduction:

The specific neural areas are located in the pons and reticular substance of medulla oblongata. These areas regulate the intrinsic rhythmicity of respiration. There are two respiratory centers in the reticular substance of the medulla oblongata, namely, the dorsal respiratory groups and ventral respiratory groups.

Please refer to Clinical Application Case-1 for further information.

Explanation

The PO2 and the barometric pressure both decrease with an increase in the elevation but the percentage of oxygen remains the same. The arterial oxygen pressure also decreases with the decrease in atmospheric PO2. The level of the PaO2 falls below 60 mm Hg (millimeters of mercury) as a result of the continuous rise in the elevation

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