This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

Movement of particles from high to low concentration. 

Movement of materials from high to low concentration through a protein channel. 

What is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein?

Osmosis is the movement of _____ across a membrane.

Molecules diffusing with the concentration gradient through a protein channel is...

Active transport requires _____ to move materials across the cell membrane.

Water moved into or out of the carrots by

Osmosis is a form of ______________. 

Solutes move with the concentration gradient, therefore no energy is used. 

ATP is a form of energy.

Solutes move against the concentration gradient, therefore energy is needed. 

Uses ATP (energy)

Aqa Cell Transport

Aqa Cell Transport

Aqa Cell Transport

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Aqa Cell Transport

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Aqa Cell Transport