Diffusion
movement of molecules from an area of higher concentration to lower concentration
Osmosis
diffusion of water across a selectively permeable membrane
Active transport
movement of substances across a membrane using energy (ATP)
Facilitated diffusion
passive transport of molecules using membrane proteins
Filtration
movement of substances driven by pressure
Metabolism
all chemical reactions that occur in the body
Anabolism
building up of chemical molecules from simpler ones
Catabolism
breaking down of complex molecules into simpler ones
Cellular respiration
Process by which cells produce ATP from glucose
Action potential
an electrical signal transmitted along a neuron
Synapse
junction where neurons communicate with other cells
Muscle contraction
process by which muscle fibers generate force
Thermoregulation
regulation of body temperature
Gas exchange
movement of oxygen and carbon dioxide between air and blood
