Cell Membrane
What are the 2 types of Cell membrane transport?
Active and Passive.
Only some things can get in or out.
Diffusion is when...
Molecules move down their concentration gradient.
Does it require energy? Why or Why Not?
It always requires energy because it is moving up its gradient.
What is tonicity?
The ability for a solution to cause a cell to gain or lose water
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 does the protein pump do?
It 'pumps' molecules into/out of a cell against its gradient.
Which solution do plant cells prefer? When in this solution, what do they become?
Hypotonic, turgid
Do phospholipids like water? Why or why not?
The head is hydrophilic and the tail is hydrophobic.
Which molecules are involved in diffusion?
Water (H20) Oxygen (O2) Carbon Dioxide (CO2) ----> SMALL!
When will diffusion stop occurring?
When it reaches its equalibrium.
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, explode
What is embedded in the phospholipid bilayer?
Proteins.
Name some molecules that are a part of facilitated diffusion.
Sugar/Glucose (C6H12O6) Chlorine (Cl-) Sodium (Na+) [These are big]
What is osmosis??
The amount of solute in a solution affects the movement of the solvent across the cell membrane.
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 diffusion 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)
What is the main difference between Active and Passive Transport?
Active requires energy, Passive does not.
Which organelle "digests" the particles that entered s cell?
vesicles