Cells and cell transport

Front

What is osmosis?

Back

The movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the function of the NA/K pump?

Back

A protein that pumps sodium out of the cell and potassium into the cell, using energy to maintain the electrochemical gradient.

Front

What is exocytosis?

Back

The process by which a cell expels materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

Front

What is facilitated diffusion?

Back

Transport that uses proteins to help move molecules across the membrane without using energy.

Front

What is a phospholipid?

Back

A type of lipid molecule that is a major component of cell membranes, consisting of two fatty acids, a glycerol, and a phosphate group.

Front

What is the role of the cell membrane?

Back

To protect the cell, provide structure, and regulate the movement of substances in and out of the cell.

Front

What is active transport?

Back

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is diffusion?

Back

The process by which molecules spread from an area of high concentration to an area of low concentration.

Front

What is endocytosis?

Back

The process by which a cell takes in materials by engulfing them in a vesicle.

Front

What is the concentration gradient?

Back

The difference in the concentration of a substance across a space, which drives diffusion.