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24 Cards in this Set

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OSMOSIS & DIFFUSION
the movement of anything into & out of a cell
PROCESSES OF TRANSPORT
Types
Active (cell needs ATP/energy to get things into or out of cell)
Passive (easy; no energy involved. examples are diffusion & filtration)
PASSIVE TRANSPORTS
Diffusion
The tendency of molecules & ions to spread evenly due to constant kinetic energy
CONCENTRATION GRADIENT
High to low concentration
Things will always move from high to low.

(either moving to or from concentration gradiant)
SIMPLE DIFFUSION
This is when it's either lipid soluble, small enough to fit through the membrane channels, or assisted by a carrier molecule
OSMOSIS
Unassisted diffusion of a solvent (usually water)
FACILATED DIFFUSION
Moves glucose sugars & amino acids.

Binds to protein carriers in membrane & ferry's them through the membrane
OR
Moves through water filled protein channels
CARRIERS (PERMEASES)
Envelope the particle to pass it in the cell
Typically move polar particles
CHANNELS
Open or selective transports
AQUAPORINS
Free moving water channels so water can go in an out of the cell
OSMOLARITY
Concentration of solute particles in a solution

Unit: OSMOL/L
HYDROSTATIC PRESSURE
water pressure against the cell wall
primarily in plant cells
OSMOTIC PRESSURE
Resistance from the cell against water entry.
TONICITY
Ability of a solution to change shape of a cell by changing internal water volume
ISOTONIC
Solution has same tonicity as the cells
Most solutions of the body are isotonic
HYPERTONIC
when a cell loses water
HYPOTONIC
when a cell gains water
FILTRATION
based on hydrostatic pressure
ACTIVE PROCESSES
defintion
types
when solute pumps move solutes into cell AGAINST the concentration gradient.
1 Primary - direct
2 Secondary - indirect
SYMPORT
When things move in the same direction
ANTEPORT
When things move in the opposite direction
PRIMARY TRANSPORT
Reaction that uses ATP to bond & bring the cell in.
Sodium Potassium Pump: (Na+-K+ATPAFE)
SECONDARY TRANSPORT
brings things into the cell
VESICULAR TRANSPORT
moves macromolecules & lg particles out of the cell or EXOCYTOSIS