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BIO May Exam

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Question:

Talk about the three components of the alveolus and their purpose

Author: Rebeca Lorena Arce Fonseca



Answer:

Capillaries: have a low o2 and high co2 concentration, gas exchange occurs type I pneumocyte: has a thin wall for short diffusion distance type II pneumocyte: releases a surfactant to reduce surface tension in the alveolus; to prevent sides from sticking together. AND they keep the alveolus moist


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