Cell Transport and Osmosis

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 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 concentration gradient.

Front

Define diffusion.

Back

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

Front

What is facilitated diffusion?

Back

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

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will gain water and swell.

Front

What is an isotonic solution?

Back

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

Front

What is the role of protein channels in cell transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, often during facilitated diffusion.

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 a selectively permeable membrane?

Back

A membrane that allows certain molecules or ions to pass through it by means of active or passive transport.