Diffusion And Osmosis

Front 1

Diffusion

Back 1

Form of passive transport. Molecules move across the plasma membrane by crossing the lipid bilayer.

Front 2

Facilitated Diffusion

Back 2

Form of passive transport. Molecules move across the plasma membrane using a transport protein.

Front 3

Active Transport

Back 3

Requires energy from the cell - ATP. Molecules move against their concentration gradient.

Front 4

Exocytosis

Back 4

Vesicle inside the cell fuses with the plasma membrane and releases its contents outside the cell.

Front 5

Endocytosis

Back 5

Plasma membrane forms a pocket that pinches in containing material from outside the cell.

Front 6

What is the difference b/w active transport and passive transport?

Back 6

Active transport requires energy from the cell (ATP) and moves against the concentration gradient.

Front 7

What are two kinds of passive transport?

Compare and contrast them?

Back 7

Diffusion and facilitated diffusion.

Both move down the concentration gradient but only the latter uses a transport protein.

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Front 8

How does water move across a plasma membrane?

Back 8

Water moves across a plasma membrane in two ways:
-Simple diffusion through the plasma membrane
-Facilitated diffusion through a channel protein called an aquaporin

Front 9

How do gases such as oxygen and carbon dioxide move across the plasma membrane?

Back 9

Simple diffusion directly through the plasma membrane.