Temperature affection Membranes
- Created by: Jasmin
- Created on: 20-10-14 20:07
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- Cell Membranes
- Membranes are affected by temperature
- 1) Temperatures below 0C -The phospholipids dont have much energy so they cant move much They are packed closely together and the membrane is rigid.
- But channel proteins and carrier proteins in the membrane denature increasing the permeability of the membrane. Ice crystals may form nd pierce the membrane , making it highly permeable
- Temperatures between 0 and 45
- The phospholipids can move around and are not packed as tightly together
- The membrane is partially permable
- As the temperature increases the phospholipids move more because they have more energy -this increases the permeability of the membrane
- Temperatures above 45
- The phospholipid bilayer starts to melt (break down) and the membrane becomes more permable
- Water inside the cell expands -putting pressure on the membrane
- Channel proteins and carrier proteins in the membrane denature so they cant control what enters and leaves the cell -this increases the permeability of the membrane
- 1) Temperatures below 0C -The phospholipids dont have much energy so they cant move much They are packed closely together and the membrane is rigid.
- Membranes are affected by temperature
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