Diffusion

Question 1

What is a solution?

Answer 1

A mixture of 2 or more substances (a solute and a solvent)

Question 2

What is a solute?

Answer 2

A substance that is dissolved in a solution

Question 3

What is a solvent?

Answer 3

The dissolving agent, a substance which the solute dissolves into (eg. water)

Question 4

What is diffusion?

Answer 4

Diffusion is the process by which molecules or ions of liquids/gases move from regions of high concentration to low concentration.

Question 5

Where does movement of molecules occur?

Answer 5

Across the cell membrane and up or down a concentration gradient.

Question 6

Is moving from areas of high concentration or low concentration moving up or down the concentration gradient?

Answer 6

Down

Question 7

What is simple diffusion?

Answer 7

Simple diffusion is the simple and unaided movement of molecules through a cell membrane.

Question 8

What is the point of the concentrations becoming equal?

Answer 8

Dynamic Equilibrium no. molecules entering = no. molecules exiting

Question 9

What is facilitated Diffusion?

Answer 9

Is when transport proteins assist particles to diffuse across a membrane as their molecules are too big.

Question 10

What are the two types of transport proteins?

Answer 10

1. Carrier proteins

2. Channel proteins