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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

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

Case 1

After an individual returns to a lower altitude, an increased ventilation continues for a few days. What causes the individual to maintain a higher than normal respiratory rate?

Summary Introduction

To review:

The reason that results in maintaining a higher than normal respiratory rate in an individual after his/her return to lower altitude.

Introduction:

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

Explanation

The individual maintains a higher respiratory rate because as the individual returns from a higher altitude region, the barometric pressure rises steadily which causes an increase in the atmospheric PO2 (pressure of oxygen) As a consequence of an increase in the PO2, the PAO2 (partial pressure of oxygen) also increases which causes a cessation of the stimulation of peripheral chemoreceptors...

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