Cell membrane Flashcards
What are the two components of a phospholipid molecule?
Phosphate and Fatty Tail Acid
What property of molecules means it is attracted to water?
Hydrophilic
What particles can pass easily across the cell membrane?
Particles that are soluble in water
What property of molecules means it is ‘water repelling’?
Hydrophobic
What is the lipid bi-layer made up of?
Phospholipid molecules
there are spaces between these through which small molecules can pass
Protein channel
What are protein molecules embedded in the cell membrane with sugar molecules attached called?
Glycoproteins
What is diffusion?
Random movement from an area of high concentration to one of low
What is necessary for diffusion to occur?
A concentration gradient
What are the two types of cell transport?
Active and Passive transport
What is the main difference between active and passive transport?
Active transport requires energy, while passive transport does not
Where are cholesterol molecules in the lipid bi-layer?
Scattered randomly
What process takes liquid droplets inside of a cell?
Pinocytosis
What process takes solid chunks inside of a cell?
Phagocytosis
What process does a unicellular organism use to move waste products out?
Exocytosis
The use of transport proteins to move particles across the cell membrane
Active transport
What process does a cell use to excrete something it has produced?
Exocytosis
What is the diffusion of water called?
Osmosis
What is the increased pressure in a cell as a result of osmosis called?
Turgor pressure
In what type of solution will an animal cell burst?
Hypotonic solution
A plant cell will shrink in this type of solution
Hypertonic
The shrinking of the cytoplasm in a plant cell
Plasmolysis
The pressure is important to the structure of a plant. It is a result of osmosis.
Osmotic pressure
