Movement of Solutes

Is simple diffusion a passive process?

YES

Does simple diffusion require cells to expend energy?

NO

Simple diffusion is the movement of molecules from an area of _____concentration to an area of ______concentration

Higher

Lower

Which type of molecules are able to enter and exit a cell by diffusion?

Small, nonpolar molecules

Examples of molecules that can pass through simple diffusion

Oxygen

lipid-soluble

in the case of bacteria the transporters that are used are (specific or nonspecific)?

NONSPECIFIC

Bacteria live in an environment that requires them to transport LARGE molecules. How do they do this?

Exoenzymes break these molecules into smaller molecules which are moved by facilitated diffusion

During ACTIVE TRANSPORT the molecules crossing the plasma membrane flow from an area of ______ concentration to an area of ______ concentration

Low

Hight

Does active transport require energy?

Yes!

What type of protein is required for active transport

Protein PUMPs

Molecules or ions that move through the membrane by active transport

Any molecule (polar or nonpolar) as they are moving from an area of low to high

How does active transport impact the speed on flow?

Increases the speed