GCSE Biology Unit 3

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Created by: Holliee
Created on: 13-05-11 11:24

In osmosis, water molecules move across:

partially permeable membrane

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what is transpiration?

the loss of water from the surface of the leaves

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what do the guard cells control?

the size of the stomata

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what increases the rate of transpiration?

hot, dry, windy conditions

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as you breathe in:

intercostal muscles and diaphragm contract, thorax volume increases, pressure decreases

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what are two features of active transport?

goes against concentration gradient and requires energy

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the two circulatory systems are:

one to the lungs and one the rest of the body

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as you breathe out:

intercostal muscles and diaphragm relax, thorax volume decreases, air forced out

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Diffusion is when particles move:

from a high concentration to a low concentration

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how are the alveoli specialised?

large surface area, thin walls, copious blood supply

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Other cards in this set

Card 2

Front

what is transpiration?

Back

the loss of water from the surface of the leaves

Card 3

Front

what do the guard cells control?

Back

Card 4

Front

what increases the rate of transpiration?

Back

Card 5

Front

as you breathe in:

Back

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GCSE Biology Unit 3