Cell Transport

Front

What is simple diffusion?

Back

Simple diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration without the use of energy or transport proteins.

Front

What happens to a cell in a hypotonic solution?

Back

A cell in a hypotonic solution will swell and may burst (lyse) due to the influx of water.

Front

What is active transport?

Back

Active transport is the movement of particles against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What occurs to a freshwater fish cell in saltwater?

Back

The cell would shrivel because the saltwater solution is hypertonic, causing water to leave the cell.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a cell membrane via protein channels, without the use of energy.

Front

Define osmosis.

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, leading to water moving out of cells placed in it.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, causing water to move into cells placed in it.

Front

What is the role of molecular pumps in cell transport?

Back

Molecular pumps are proteins that use energy to move ions or molecules against their concentration gradient across the cell membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the plasma membrane.