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Biology Vocab 11/8
Biology vocabulary quiz of 11/8 in Mrs. Emerson's class.
8
Biology
9th Grade
10/28/2013

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Term
Phospholipid
Definition
A lipid containing the element phosphorus, glycerol, and two fatty acids.

The main structural component of membranes.
Term
Cell Membrane
Definition
A thin, flexible barrier made with phospholipids with embedded proteins.
Term
Endocytosis
Definition
The process of entering a cell. The substance is surrounded by a membrane.
Ex: Phagocytosis & Pinocytosis
Term
Exocytosis
Definition
The process of exiting a cell.
Term
Passive Transport
Definition
Going in and out of a cell without energy.
Ex: Diffusion, Osmosis, Facilitated Diffusion
Term
Active Transport
Definition
Going in and out of a cell with energy. Going against the concentration gradient.
Term
Diffusion
Definition
When particles move from an area where they are more concentrated to an area where they are less concentrated to reach equilibrium.(no energy)
Term
Osmosis
Definition
The diffusion of water through a selectively permeable membrane.
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