Biology: Cell Transport

Front

What is a hypotonic solution?

Back

A solution that causes cells to swell and potentially burst due to the net movement of water molecules into the cell.

Front

What is diffusion?

Back

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

Front

What is osmosis?

Back

The movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration.

Front

What is active transport?

Back

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

Front

What is a hypertonic solution?

Back

A solution that causes cells to shrink due to the net movement of water molecules out of the cell.

Front

What is facilitated diffusion?

Back

The process of passive transport of molecules across a cell membrane via specific transmembrane proteins.

Front

What is the role of a semipermeable membrane?

Back

To allow certain substances to pass while blocking others, thus controlling the movement of materials in and out of the cell.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.

Front

What is endocytosis?

Back

The process by which cells engulf substances from their external environment, bringing them into the cell.

Front

What is exocytosis?

Back

The process by which cells expel materials to the outside environment.