Exchange between organsims and their environment

This is for the first double page in chapter 13

13.1 in the AQA book page 176 - 177

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  • Created by: Rebecca
  • Created on: 03-03-13 18:42
What will affect the amount of material that needs to be exchanged?
The size and the metabolic rate of an organism
1 of 6
What four things need to be interchanged between an organism and its environment?
Respiratory gases, nutrients, excretory products, heat
2 of 6
What two ways can exchange take place?
Passively = no energy required like diffusion or osmosis, actively = energy required by active transport
3 of 6
Where on an organism does exchange take place?
On the surface
4 of 6
Two ways organisms have adapted to increase surface area?
A flatterned shape so no cell is far away from the surface and specialised exchange surfaces with large areas to increase volume like gills on fish
5 of 6
3 factors which affect the rate of diffusion of substances into cells?
surface area, thickness of cell-surface membrane, concentration gradient of substance between inside and outside cell, temperature
6 of 6

Other cards in this set

Card 2

Front

What four things need to be interchanged between an organism and its environment?

Back

Respiratory gases, nutrients, excretory products, heat

Card 3

Front

What two ways can exchange take place?

Back

Preview of the front of card 3

Card 4

Front

Where on an organism does exchange take place?

Back

Preview of the front of card 4

Card 5

Front

Two ways organisms have adapted to increase surface area?

Back

Preview of the front of card 5
View more cards

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