Movement across membranes for A&P

Hypertonic

Concentration of solutes in ECF is higher than in the ICF

Hypotonic

Concentration of solutes in ECF is lower than in the ICF

Isotonic

Concentration of solute's ECF is equal to the ICF

Diffusion

Movement of molecules from high to low concentration

Facilitated diffusion

Movement from high to low concentration across a membrane through a protein channel

Endocytosis

Movement of large or many particles into a cell

Phagocytosis

Cell eating

Pinocytosis

Cell drinking

Receptor mediated endocytosis

Use of protein receptors on the cell surface to bring in many molecules at once

Exocytosis

Movement of large or many particles out of a cell

Passive transport

No ATP required

Active transport

ATP required

concentration gradient

difference in concentration from one area to another

equilibrium

when molecules move equally in all directions

ICF

fluid inside the cell

ECF

fluid outside the cell

osmosis

diffusion of water across a membrane