CH.3 Topic 5

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Passive Transport

No energy is required by the cell, happens automatically without effort
Diffusion

Movement of particles from a high concentration to a low concentration
Osmosis

Movement of water from a high concentration to a low concentration
Concentration Gradient

Area of High concentration to an area of Low concentration
Diffusion Equilibrium

When concentrations of the diffusing substance in the two compartments are the same or equal
Osmolality

A particle measurement
Solute

Stuff dissolved. EX: salts or gases.
Solvent

Water
Physiological Steady State

A stable condition that does not change over time
Diffusible Substances

Capable of passing through membranes by osmosis
Facilitated Diffusion

The carrier mediated transport of a solute through a membrane down its concentration gradient
Osmotic Pressure

Spontaneous net movement of solvent molecules through partially permeable membranes
Hypertonic

Solution is one with a higher concentration
Hypotonic

Solution with a lower concentration
Isotonic

Equal concentration of solutes inside and out. No net flow of water
Filtration

Process to separate solid particles from fluids