Download HOMEOSTASIS AND CELL TRANSPORT NOTES SOLUTIONS

HOMEOSTASIS AND CELL TRANSPORT NOTES
SOLUTIONS
Solute ________________________
Ex: Salt
Solvent _______________________
saltwater
solution
Ex: Water
Aqueous Solution: __________ is the solvent. The cytoplasm is an _______________ solution.
CELL MEMBRANE
All cells are contained within the boundary of a _______________ ___________________.


The organelles in eukaryotic cells have their own ______________ membrane.
These membranes control what goes _______ and _______.
Membranes are made of special lipid molecules called _________________________ arranged in two layers
called a ______________.



Phospholipids have a _____________________ head that “love” water.
Phospholipids have _______________________ tails that “fear” water.
This makes the membrane _______________________.
Membranes allow cells to ____________________________ with each other.

This allows cells to respond to the ______________________ and each _________________.
Membranes maintain __________________ by regulating which molecules come into and out of the cell.


Homeostasis refers to a cell maintaining a ___________________ state.
It is also known as reaching ___________________________.
A _____________________ gradient is caused by the concentration of molecules inside the cell being
________________ from the outside of the cell or just different concentrations ______________________.

When the concentration is the _____________ throughout, ______________ is achieved.
PASSIVE TRANSPORT
Movement of substances into and out of the cell without using __________________.

TYPES OF PASSIVE TRANSPORT
Substance Moving
Direction of Movement
Conditions
Simple Diffusion
Osmosis
Facilitated Diffusion
Selectively permeable
membrane, or no
membrane
Selectively permeable
membrane
Needs a carrier protein
and selectively
permeable membrane
Osmosis
 Water will always flow to where there is MORE ______________________ to reach OSMOTIC balance.
o TYPES OF SOLUTIONS:
Fluid OUTSIDE of the
Fluid OUTSIDE of the
Fluid OUTSIDE of the
cell has a HIGH
cell has a LOW
cell has the SAME
concentration of
concentration of
concentration of
solutes
solutes
solutes
Type of Solution
Direction of water
flow
Effect on cell
ACTIVE TRANSPORT
_______________ transport moves molecules against their concentration gradient, ____________ to
______________.


Requires _______________ in the form of ATP
Examples:
o The _______________ Potassium pump in animals
o
o
Endocytosis – cells can ______________ many molecules from the outside of a cell.
 A piece of the membrane is used to create a _________________ that can transport
material around the cell.
Exocytosis - __________________ can join the membrane to _____________ materials to the
outside of the cell.
ENDO _____________
EXO ________________