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2.9: Passive Transport

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

active transport

Movement across a membrane during which molecules move from an area of low concentration to an area of high concentration.

carrier protein

Transport protein that aids in diffusion by carrying a molecule across the membrane.

channel protein

Transport protein that aids in diffusion by creating a passageway through the membrane.

diffusion

Movement of molecules from an area of high concentration to an area of low concentration.

facilitative diffusion

Diffusion in which assistance by a transport protein is required.

ion

Charged atom; atom that has gained or lost one or more electrons.

passive transport

Movement of molecules across a membrane without the input of energy.

simple diffusion

Diffusion in which molecules freely move across the membrane; no assistance by proteins is necessary.

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Difficulty Level:
At Grade
Grades:
7 , 8
Date Created:
Nov 29, 2012
Last Modified:
Aug 30, 2016
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