Plasma Membrane Flashcards
What is the function of the plasma membrane?
To maintain homeostasis
How does the plasma membrane maintain homeostasis?
By controlling substances entering and leaving the cell ( selective )
What is the property of a membrane that allows some materials to pass through while keeping others out ?
Selective ( semi) permeability
How many layers are found in the cell membrane?
4
What 4 things are found in the plasma membrane ?
Cholesterol , transport proteins , carbohydrates, and phospholipids
What stabilizes the membrane by preventing phospholipids from sticking together?
Cholesterol
What helps move large molecules across the membrane ( ex : glucose ) ?
Transport proteins
What are used for cell recognition and attachment?
Carbohydrates
What has a phosphate head and fatty acid tail?
Phospholipids
Phosphate + glycerol =
Phosphate
Hydrophilic means
Attracted to water
Hydrophobic means
Repelled by water
What part of the phospholipid is hydrophilic ?
The head
What sort of the phospholipid is hydrophobic?
The tails
Can phospholipids move around and if so where ?
Yes the can. They can move sideways through their layer,but not from one layer to another
Name given to this model of the plasma membrane
Fluid mosaic model
Because the phospholipids are free to move within the membrane
Fluid
Because of the pattern it produces when viewed from viewers
Mosaic
