Examlex
Why did the Homestead Act fail in its purpose of peopling the west with small family farms?
Diffusion Gradient
A variance in concentration that permits molecules to move passively from an area of higher concentration to an area of lower concentration.
Respiratory Membrane
The thin barrier in the lungs through which gas exchange between the air in the alveoli and the blood in the capillaries occurs.
Gas Exchange
The biological process through which gases (such as oxygen and carbon dioxide) are transferred between the blood and the external environment in the lungs.
Alveolar Ventilation
The process by which air moves in and out of the alveoli, the tiny air sacs in the lungs, allowing for gas exchange with the blood.
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