Diffusion, Osmosis and Active transport

Question 1

What is diffusion?

Answer 1

Diffusion is when particles move from a high concentration, down the concentration gradient, to a low concentration.

Question 2

What is Osmosis?

Answer 2

Osmosis is the movement of water through a partially permeable membrane from an area of high water concentration to an area of low water concentration.

Question 3

What is active transport?

Answer 3

Active transport is a movement across a membrane from a low to a high concentration against the concentration gradient

Question 4

How does active transport happen?

Answer 4

A carrier protein pick up a particle from a low concentration and then moves it to a place of higher concentration.