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Cell Test Review

Cells/Cell Organelles

QuestionAnswer
What is a phospholipid? It is a lipid containing a phosphate group in its molecules. It is a major part of the cell membrane.
What is Passive Transport? The movement of materials across the cell membrane without the use of energy.
What is Active Transport? Movement of materials against a concentration gradient that requires the use of energy.
What is Simple Diffusion? The process by which molecules of a substance move from an area of high concentration to an area of low concentration.
What is Facilitated Diffusion? The process in which molecules pass through special protein channel because they cannot directly diffuse across a membrane.
What is Osmosis? The (facilitated) diffusion of water selectively permeable membrane. It works by moving water molecules from a high concentration to a low concentration.
Isotonic? Concentration of solutes are the same inside and outside of the cell.
Hypotonic ? The outside of the cell has a lower solute concentration than inside the cell.
Hypertonic? The outside of the cell has a higher solute concentration than inside the cell.
Created by: AJ_81
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