Vocabulary Obtaining and Removing Materials

Front

What is exocytosis?

Back

The process by which the vacuole surrounding particles fuses with the cell membrane, forcing the contents out of the cell.

Front

What is the cell membrane?

Back

A thin, flexible barrier that surrounds a cell and controls which substances pass into and out of the cell.

Front

What is facilitated diffusion?

Back

A process where proteins in the cell membrane form channels through which sugars can pass.

Front

What is diffusion?

Back

The process by which molecules move from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

The movement of materials across a cell membrane using cellular energy.

Front

What is osmosis?

Back

The diffusion of water molecules through 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 concentration gradient?

Back

The difference in the concentration of a substance across a space.

Front

What role do proteins play in the cell membrane?

Back

Proteins form channels and transporters that help move substances across the cell membrane.

Front

What is a selectively permeable membrane?

Back

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