Examlex
Determine the formula for an aluminosilicate where one-quarter of the silicons are replaced by an aluminum atom. The charge is balanced by sodium ions.
Alveoli
Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Capillaries
Small blood vessels in the body's circulatory system that facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues.
Active Transport
The movement of molecules across a cell membrane from a region of lower concentration to one of higher concentration, using energy usually in the form of ATP.
Plasma Membrane
The lipid bilayer membrane that surrounds a cell, controlling the movement of substances in and out of the cell.
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