Multiple Choice
Which structure in plants serves as an opening for the exchange of gases and water?
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40. Circulatory System
Gas Exchange
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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 advantage of having a large surface area in the lungs?
A
It reduces the amount of energy required for breathing.
B
It helps maintain a constant body temperature.
C
It increases the rate of gas exchange by allowing more oxygen and carbon dioxide to diffuse across the alveolar membrane.
D
It prevents pathogens from entering the respiratory system.
Verified step by step guidance1
Understand the function of the lungs: The lungs are responsible for gas exchange, specifically the intake of oxygen and the removal of carbon dioxide, which occurs across the alveolar membrane.
Recognize the importance of surface area: A large surface area in the lungs allows for more alveoli, which are tiny air sacs where gas exchange occurs. This increases the efficiency of oxygen and carbon dioxide diffusion.
Relate surface area to diffusion: According to Fick's Law of Diffusion, the rate of diffusion is directly proportional to the surface area available for exchange. A larger surface area means more molecules can diffuse simultaneously.
Eliminate incorrect options: Reducing energy for breathing, maintaining body temperature, and preventing pathogens are not directly related to the advantage of a large surface area in the lungs. Focus on the role of gas exchange.
Conclude the primary advantage: The large surface area increases the rate of gas exchange by allowing more oxygen and carbon dioxide to diffuse across the alveolar membrane, which is essential for maintaining proper respiratory function.
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