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Chapter 2: Cells in Action
Test March 1
7
Science
7th Grade
12/21/2010

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Term
Diffusion
Definition

a process where particles move from higher concentration to lower concentration

 

type of passive transport

Term
Osmosis
Definition

when water diffuses into or out of a cell

 

 

(when H2O particles move from areas of higher

                     concentration to lower concentration)

 

Term
Passive Transport
Definition
occurs when small particles move from areas of high concentration to areas of lower concentration WITHOUT using energy
Term
Active Transport
Definition
a cell moving particles from low concentration to high concentration WITH the use of energy
Term
Semipermeable
Definition
allows some things to enter
Term
Exocytosis
Definition

- process of large particles (waste) leaves the cell

                                                          -active transport

Term
Endocytosis
Definition

-process by which the cell membrane surrounds particle

        Encloses the particle

         Brings particle into the cell

                  --active transport

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