Cell Transport Review

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (ATP) to move substances from low to high concentration.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a cell membrane via protein channels, from an area of high concentration to low concentration.

Front

What happens to a cell in a hypertonic solution?

Back

A cell placed in a hypertonic solution will lose water and shrink due to the higher concentration of solutes outside the cell.

Front

What happens to a cell in a hypotonic solution?

Back

A cell placed in a hypotonic solution will gain water and may swell or burst due to the lower concentration of solutes outside the cell.

Front

What is an isotonic solution?

Back

An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What role do protein channels play in cell transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, aiding in processes like facilitated diffusion.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, driving diffusion and osmosis.