B1 END OF HALF TERM TEST YR10

Question 1

What is diffusion?

Answer 1

The net random movement of particles from an area of high concentration to and area of low concentration
It is a passive process(means no energy is needed from the body)

Question 2

What is concentration gradient?

Answer 2

It is the difference in the number of cells in one area compared to another

Question 3

How are organs specialised to ensure diffusion is efficient?

Answer 3

1. Have a large surface area
2. A membrane that is thin, this provides a short diffusion pathway
3. Animals have an efficient blood supply

Question 4

What is Osmosis?

Answer 4

Osmosis is the net random movement of water molecules from an area of high water concentration to an area of low water concentration across a partially permeable membrane.

Question 5

There are different solution types…

What is Hypertonic Solution?

Answer 5

Higher solute concentration than solution

Question 6

What is Hypotonic Solution?

Answer 6

Higher water concentration than another solution

Question 7

What is Isotonic Solution?

Answer 7

Both solutes have an equal concentration of solutes

Question 8

What is active transport?

Answer 8

It is the process by which molecules move from an area of low concentration to an area of higher concentration across a partially permeable membrane