Extra

Question 1

Ways the rate of diffusion molecules can be increased?

Answer 1

1. Increased temp
2. Larger surface area
3. Greater diffusion gradient

Question 2

One similarity between Nervous system and Hormone system?

Answer 2

Both carry information from one part of the body to another.

Question 3

Function of the waxy cuticle:

Answer 3

To prevent water loss

Question 4

Function of protein

Answer 4

Growth + Repair

Question 5

Active Transport meaning:

Answer 5

Movement against the concentration gradient.

Question 6

Causes the lung model balloons to deflate:

Answer 6

1. Decrease in volume
2. Increased pressure

Question 7

How the lung model differs from a real respiratory system?

Answer 7

1. Intercostal muscles relax
2. Ribs move down and in
3. The model doesn’t move

Question 8

Elements in plant cells

Answer 8

1. Nitrogen - needed to synthesise proteins and grow
2. Calcium - makes cell walls + holds cells together
3. Magnesium - makes chlorophyll

Question 9

Test any gas collected to verify it is oxygen?

Answer 9

Oxygen relights a glowing splint

Question 10

Palisade layer is adapted ina plant cell for photosynthesis:

Answer 10

1. Cells are organised with their long axis at right angles to the upper epidermis. - allows more cells to fit across leaf for more photosynthesis
2. Each cell packed with chloroplasts to maximise light absorption

Question 11

How do gases enter and leave the leaf?

Answer 11

By Diffusion through the stomata in the lower epidermis