during rest versus after exercise. How might this compare to measurements taken with a spirometer of tidal volume, inspiratory and expiratory reserve volumes, vital capacity
during rest versus after exercise. How might this compare to measurements taken with a spirometer of tidal volume, inspiratory and expiratory reserve volumes, vital capacity
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Describe what happens physiologically when someone is breathing during rest versus after exercise. How might this compare to measurements taken with a spirometer of tidal volume, inspiratory and expiratory reserve volumes, vital capacity?
Expert Solution
Step 1: Breathing at rest
During rest, when someone is breathing, the physiological processes are relatively calm.
- The main muscles involved in breathing are the diaphragm and intercostal muscles.
- Inhalation is an active process where the diaphragm contracts, moving downward, and the intercostal muscles on contraction lift the ribcage, expanding the thoracic cavity.
- This decreases air pressure and increases the volume in the lungs, causing air to flow in.
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