Prime Time Day 10

Front

What is osmosis?

Back

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

Front

What is active transport?

Back

The process of moving molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

Define isotonic solution.

Back

A solution in which the concentration of solutes is the same inside and outside the cell, resulting in no net movement of water.

Front

What happens to a cell in a hypertonic solution?

Back

Water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

Water moves into the cell, causing it to swell and potentially burst.

Front

What is facilitated diffusion?

Back

A process of passive transport that uses transport proteins to help move molecules across the cell membrane.

Front

What is endocytosis?

Back

The process by which a cell engulfs material from its environment, forming a vesicle.

Front

What is exocytosis?

Back

The process by which a cell expels materials in vesicles that fuse with the cell membrane.

Front

What is a concentration gradient?

Back

A difference in the concentration of a substance across a space or membrane.