Moving Cellular Material

Front

What is diffusion?

Back

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

Front

What stops diffusion through a membrane?

Back

Diffusion through a membrane will stop once the concentration of molecules is the same between the exterior and interior.

Front

What does it mean for a cell membrane to be semipermeable?

Back

A semipermeable cell membrane means that only certain substances can enter and exit the cell.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules only through a membrane.

Front

What is passive transport?

Back

Passive transport is the movement of substances through a cell membrane without using the cell's energy.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What role do concentration gradients play in diffusion?

Back

Concentration gradients drive the movement of molecules during diffusion, as substances move from areas of higher concentration to areas of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across a cell membrane.

Front

What types of molecules typically undergo osmosis?

Back

Water molecules typically undergo osmosis.

Front

What is the significance of a cell membrane's selective permeability?

Back

Selective permeability allows the cell to maintain homeostasis by controlling which substances enter and exit.

Tags

NGSS.HS-LS1-3