Diffusion and Osmosis

Front

What is osmosis?

Back

Osmosis is 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 role of a selectively permeable membrane in osmosis?

Back

A selectively permeable membrane allows certain molecules, such as water, to pass through while restricting others, facilitating the process of osmosis.

Front

What happens to a plant cell when it is placed in a hypotonic solution?

Back

The plant cell will swell as water enters the cell by osmosis, potentially leading to turgor pressure.

Front

What is active transport?

Back

Active transport is the process by which cells move substances against their concentration gradient, requiring energy, usually in the form of ATP.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion and osmosis.

Tags

NGSS.HS-LS2-3

Front

What occurs to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink or crenate.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of solute particles from an area of higher concentration to an area of lower concentration, while osmosis specifically refers to the movement of water.

Front

What is turgor pressure?

Back

Turgor pressure is the pressure exerted by the fluid inside the central vacuole of a plant cell against the cell wall, helping maintain the cell's shape.

Tags

NGSS.MS-LS1-2

Front

How does temperature affect the rate of diffusion?

Back

Generally, an increase in temperature increases the kinetic energy of molecules, leading to a faster rate of diffusion.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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 without the use of energy.