Multiple Choice
What happens when your diaphragm relaxes and moves upward during the breathing process?
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22. The Respiratory System
Introduction to Lung Physiology
Multiple Choice
The contraction and relaxation of which muscle allows breathing to occur?
A
Diaphragm
B
Gastrocnemius
C
Trapezius
D
Biceps brachii
Verified step by step guidance1
Identify the primary muscle responsible for the process of breathing, which involves both inhalation and exhalation.
Understand that breathing is a vital function that requires the expansion and contraction of the thoracic cavity.
Recognize that the diaphragm is a dome-shaped muscle located at the base of the lungs, playing a crucial role in respiration.
During inhalation, the diaphragm contracts and moves downward, increasing the volume of the thoracic cavity and allowing air to enter the lungs.
During exhalation, the diaphragm relaxes and moves upward, decreasing the volume of the thoracic cavity and pushing air out of the lungs.
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