Multiple Choice
The contraction and relaxation of which muscle allows breathing to occur?
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22. The Respiratory System
Introduction to Lung Physiology
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Which system is responsible for bringing oxygen into the blood and removing carbon dioxide waste from the blood?
A
Nervous system
B
Digestive system
C
Circulatory system
D
Respiratory system
Verified step by step guidance1
Begin by identifying the primary function of each system listed in the options. The nervous system is responsible for transmitting signals throughout the body, the digestive system processes food and absorbs nutrients, and the circulatory system transports blood throughout the body.
Focus on the function of the respiratory system. It is responsible for gas exchange, which involves bringing oxygen into the blood and removing carbon dioxide waste from the blood.
Understand the process of gas exchange: Oxygen is inhaled into the lungs, where it diffuses into the blood through the alveoli. Carbon dioxide, a waste product of cellular respiration, diffuses from the blood into the alveoli to be exhaled.
Recognize the role of the respiratory system in maintaining homeostasis by regulating the levels of oxygen and carbon dioxide in the blood.
Conclude that the respiratory system is the correct answer because it directly facilitates the exchange of gases necessary for cellular function and waste removal.
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