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Section 2 - Moving Cellular Materials
Vocabulary for Section 2
7
Science
7th Grade
10/28/2011

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Term
Passive Transport
Definition
The movement of substances through a cell membrane without the use of energy.
Term
Equilibrium
Definition
Occurs when molecules of one substance are spread evenly throughout another substance
Term
Active Transport
Definition
Energy-requiring process in which transport proteins bind with particles and move them throughout a cell membrane
Term
Endocytosis
Definition

Process by which a cell takes in a substance by surrounding it with the cell membrane.

 

Ex. Amoeba

Term
Diffusion
Definition
A type of passive transport in which molecules move from where there are more of them to where there are fewer of them.
Term
Exocytosis
Definition
A process by which vesicles release their contents outside the cell.
Term
Osmosis
Definition
A type of passive transport that occurs when water diffuses through a cell membrane.
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