12 Jun Phoenix NSCI 280 – Regulation of Ventilation
Question
Regulation of Ventilation
To complete this worksheet, select:
Module: Respiratory System
Activity: Animations
Title: Regulation of Ventilation
Introduction
1. a. Describe normal ventilation as a continuous cycle of inspiration and
expiration.
b. What regulates this continuous cycle?
Basic Rhythm
2. Explain the role of the inspiratory and expiratory areas of the brain.
3. What is a spirogram?
4. a. Describe inspiration stimulation by the inspiratory area of the brain.
b. Describe passive expiration.
5. Explain the role of accessory inspiratory muscles and how they are
stimulated during forced inspiration.
6. Explain stimulation and the role of the expiratory area during forced
expiration.
Control of Ventilation Rate by Other Brain Centers
7. Describe how each of the following parts of the pons modifies ventilation rate.
Pneumotaxic area
Apneustic area
8. Describe how the hypothalamus contributes to ventilation regulation.
9. a. Describe how the cerebral cortex supplies a limited level of respiratory
control.
b. Why is cortical control essential?
Effects of Blood Chemistry
9. What is function of chemoreceptors in the central and peripheral nervous
systems.
10. a. Describe the respiratory response to increasing CO2 and H+ as detected
by chemoreceptors.
b. Define hyperventilation
c. How do these adjustments contribute to homeostasis?
11. a. Describe the respiratory response to decreasing CO2 and H+ as detected by
chemoreceptors.
b. Define hypoventilation.
c. How do these adjustments contribute to homeostasis?
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