Multiple Choice
Which of the following would increase the release of oxygen from red blood cells?
40. Circulatory System
Gas Exchange
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In the alveoli and lung capillaries, carbon dioxide and oxygen are exchanged by means of __________.
A
active transport
B
endocytosis
C
pinocytosis
D
osmosis
E
diffusion
Verified step by step guidance1
Understand the concept of gas exchange in the alveoli and lung capillaries. This process involves the movement of gases like oxygen and carbon dioxide between the air in the alveoli and the blood in the capillaries.
Recognize that the movement of gases across the alveolar and capillary membranes occurs due to differences in concentration gradients. This is a key characteristic of diffusion.
Recall that diffusion is a passive transport mechanism, meaning it does not require energy. It relies on the natural movement of molecules from an area of higher concentration to an area of lower concentration.
Consider the options provided: active transport, endocytosis, pinocytosis, osmosis, and diffusion. Identify that diffusion is the process that matches the description of passive movement of gases based on concentration gradients.
Conclude that in the context of alveoli and lung capillaries, diffusion is the correct mechanism for the exchange of carbon dioxide and oxygen.
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