Cell Membrane and Transport

Front

What is the difference in the concentration of a substance from one location to another?

Back

Concentration gradient.

Front

During active transport, molecules move from an area of ______ concentration to an area of _____ concentration.

Back

Lower concentration to higher concentration.

Front

What process allows water to move into root cells of a plant when the concentration of water is higher in the soil?

Back

Osmosis.

Front

How do cells bring in molecules against the concentration gradient?

Back

Active transport using ATP.

Front

What is the amount of substance in a specific volume called?

Back

Concentration.

Front

Define diffusion.

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy.

Front

What is active transport?

Back

The movement of substances against their concentration gradient, requiring energy (ATP).

Front

What is a selectively permeable membrane?

Back

A membrane that allows certain molecules to pass while blocking others.