A&P I LAB MIDTERM

written portion

cell transport

cells are enclosed in a barrier called the plasma membrane. the membrane must be permeable to allow fluid/particles to transport in and out of the cell.

active transport

ATP is used as energy for transport to occur, goes against the concentration gradient

passive transport

movement is facilitated by concentration or pressure gradients, the solute moves down/along concentration gradient

filtration

occurs across capillary walls due to hydrostatic pressure

diffusion

the movement of molecules from an area of higher concentration to an area of lower concentration; the goal is to achieve equilibrium, that is to say equal concentration on both sides

facilitated diffusion

molecules bind to protein carrier molecules in plasma membrane or pass through channel proteins embedded in the plasma membrane

dialysis

diffusion of solutes through membranes

osmosis

diffusion of water through membranes