Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Each Hb protein can carry up to four oxygen molecules.
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22. The Respiratory System
Introduction to Lung Physiology
Multiple Choice
In human lung physiology, what is the main function of the respiratory system?
A
To exchange gases by bringing oxygen into the body and removing carbon dioxide
B
To filter blood and regulate water and electrolyte balance
C
To produce bile and metabolize toxins in the digestive tract
D
To transport nutrients and hormones through the bloodstream
Verified step by step guidance1
Step 1: Understand the primary role of the respiratory system in human physiology, which involves the process of gas exchange essential for cellular respiration.
Step 2: Recognize that the respiratory system brings oxygen (O\_2) into the body through inhalation, which is necessary for producing energy in cells.
Step 3: Identify that the respiratory system also removes carbon dioxide (CO\_2), a waste product of metabolism, from the body through exhalation.
Step 4: Differentiate the respiratory system's function from other systems such as the urinary system (which filters blood and regulates water and electrolytes), the digestive system (which produces bile and metabolizes toxins), and the circulatory system (which transports nutrients and hormones).
Step 5: Conclude that the main function of the respiratory system is to facilitate gas exchange by bringing oxygen into the body and removing carbon dioxide.
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