The importance of membranes in living organisms

im writing a unit 7 SA

can pple post up random points please cuz i wrote like 8 concepts but the SA is only 1 1/2 pages long

so if people can post up other things i can write about please

Reply 1

MadNatSci

12

What have you written about? No sense in repeating things you already know :smile:

Reply 2

papz_007

OP

MadNatSci

What have you written about? No sense in repeating things you already know :smile:

ok so far ive written about the importance of membranes in

1- diffusion
2- rates of diffustion ( i related that to ficks law )
3- fertilisation
4- Respiration and photsysnthis is plants
5- horome receptors
6- properties of a membrane
7- structureo of the membrane and how that relates to its improtance

Reply 3

Revenged

15

papz_007

ok so far ive written about the importance of membranes in

1- diffusion
2- rates of diffustion ( i related that to ficks law )
3- fertilisation
4- Respiration and photsysnthis is plants
5- horome receptors
6- properties of a membrane
7- structureo of the membrane and how that relates to its improtance

1. Think about faciliated diffusion (movement of ions through channels) as well

3. The only thing I can think of as relavent is the prevention of polyspermy

4. Respiration is good... phosphorylation of glucose to provide a higher conc inside cell than outside / formation of H+ gradient in mitochondria...etc.

Capillaries and formation of tissue fluid is another good one to talk about...

Reply 4

Twiglet

2

If you're doing microbes and disease you can talk about bacteria and anitgens- cell recognition etc, you can write a bit about that anyways since from mod1 you know that there are carbohydrates attatched to the membrane that can allow cells to be recognised.
Also, maintanance of ion gradients in nerones - thats to do with ion channels.
Basically controlling what enters and leaves cells - stops cells lysing or shrinking.
You'll be able to find the mark scheme to this question on the AQA website :smile:

The importance of membranes in living organisms

Related discussions

Articles for you