Multiple Choice
In human lung physiology, how is the surface area for gas exchange greatly expanded?
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22. The Respiratory System
Introduction to Lung Physiology
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the primary function of the respiratory system?
A
To filter waste products from the blood
B
To circulate blood throughout the body
C
To exchange gases between the body and the environment
D
To break down food into nutrients
Verified step by step guidance1
Begin by identifying the main components of the respiratory system, which include the lungs, airways, and respiratory muscles.
Understand the process of gas exchange: Oxygen is inhaled into the lungs and diffuses into the bloodstream, while carbon dioxide is expelled from the bloodstream into the lungs to be exhaled.
Recognize the role of alveoli, tiny air sacs in the lungs, where the actual exchange of gases occurs through the thin walls of the alveoli and capillaries.
Consider the importance of the respiratory system in maintaining homeostasis by regulating blood pH through the removal of carbon dioxide, a waste product of metabolism.
Reflect on how the respiratory system interacts with other systems, such as the circulatory system, to deliver oxygen to tissues and remove carbon dioxide, thus supporting cellular respiration and energy production.
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