Cell Membrane
What four things make up the cell membrane?
Phospholipid, cholesterol, protein and carbohydrate
Only some things can get in or out.
Diffusion is when molecules move.....
down (or with) their concentration gradient.
Does it require energy? Why or Why Not?
It always requires energy because it is moving up its gradient.
What solution do animal cells prefer?
Isotonic
What is the macromolecule mainly used in the phospholipid bilayer?
Lipids
What are the 2 types of cell transport?
Active and passive.
Name the 3 types of passive transport.
Simple diffusion, Facilitated Diffusion, Osmosis.
What is the difference between phagocytosis and pinocytosis?
Pinocytosis is when the cell moves larger quantities of solute or fluid into the cell (cell-drinking).
Which solution do plant cells prefer?
Hypotonic
Do phospholipids like water? Why or why not?
The head is hydrophilic and the tail is hydrophobic.
What are the two types of active transport?
In passive transport molecules go from ____ concentration to _____ concentration.
High, Low
What is Exocytosis?
Molecules are moved out of the cell using membrane-bound vesicles.
When there is more solute inside of a cell this is called a _______ solution. It causes cells to ______ because water is entering.
Hypotonic, swell
What is embedded in the phospholipid bilayer?
Proteins.
Proteins
What is osmosis??
Diffusion of water
What is Endocytosis?
Molecules are moved into the cell in membrane-bound vesicles.
When there is more solute outside of a cell this is called a _______ solution. It causes cells to ______ because water is leaving.
Hypertonic, shrivel
What is the cell membrane's job?
To maintain homeostatis.
What does passive transport never require???
Energy!!!!
Describe what isotonic, hypotonic and hypertonic are.
Iso: Solute is equal, Hypo: Solute is less on one side (Will swell) Hyper: Solute is more on one side (Will Shrink)
In active transport molecules go from _____ concentration to ______ concentration.
low, high
When there is an equal amount of solute outside of a c ell this is called a ________ solution. What happens to the cell?
isotonic; cell stays the same.