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 are levels of organization?
Biological levels that relate to another of the whole system of levels.
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.
What is Abiotic vs. Biotic?
Abiotic is factors that are non-living, Biotic is living things.
Do phospholipids like water?
The head is hydrophilic and the tail is hydrophobic.
Name some molecules that are a part of simple diffusion.
Water (H20) Oxygen (O2) Carbon Dioxide (CO2)
When will diffusion stop occurring?
When it reaches its equalibrium.
What is Exocytosis?
Molecules are moved out of the cell using membrane-bound vesicles.
If solute takes up 10% of the solution space, how much space is left for solvent?
90%
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 and charged!!!!]
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.
Why is Cellular organization important?
It shows how everything relates to one another.
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.
What is cell differentiation?
Certain genes in DNA are switched on and off to create diversity.