cell memrbrane

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Created by: shauna gardner
Created on: 23-09-13 17:45

what are the three main functions of a membrane in the cell surface?

controll which substances go in and out the cell, recignition of the cell,m cell communication

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what are the three main ways of transport through a membrane /

osmosis, diffusion and active transport

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what are the four main function of a membrane within cells

divide each component of the cell into different compartment making it function easier, some are folded meaning more surface area for more efficient reactions, vesiles for transport,control what entre and leaves the organelle

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what happends when temperature affects membranes?

the phospholipids move more or less affecting the structure

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what happens when the temperature is under 0 in membranes ?

the phospholipids do not have much energy, packed closly making the membrane rigid, channel and carrier proteins denature increasing permiability of membrane, ice crystals form cutting the membrane making more permiable

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what happens when the temperature of membranes is 0-45?

phospholipids can move around, are not packed as tightly, partically permebale, temperature increases movement of phospholipids increase, increases permiability

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what happens when the temperature of the membrane gets over 45?

phospholipid layer starts to break down, membrane becomes permiable, water inside cell expands- pressure on membrane, channel and carrier proteins denature- cant control what enters and leaves the membrane, increases permiability.

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Other cards in this set

Card 2

Front

what are the three main ways of transport through a membrane /

Back

osmosis, diffusion and active transport

Card 3

Front

what are the four main function of a membrane within cells

Back

Card 4

Front

what happends when temperature affects membranes?

Back

Card 5

Front

what happens when the temperature is under 0 in membranes ?

Back

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cell memrbrane