Cell Transport

definition: molecules or ions move from regions of higher concentration to regions of lower concetration

example: exchange of oxygen and carbon dioxide in lungs, spreading of perfume throughout a room

definition: same as diffusion, except carrier molecules move substances through membrane

example: moving glucose through cell membrane

definition: water molecules move from high concentrations of water to low concentrations of water

example: water entering a cell

definition: molecules move from high hydrostatic pressure (water pressure) to low hydrostatic pressure

example: kidneys filitering waste

definition: carrier protiens move molecules from low concentration to high concentration

example: moving amino acids

definition: too large molecules enter cell through a vesicle

• example: pinocytosis is the membrane eating liquid droplets
• phagocytosis is the membrane eating particles
• receptor-mediated endocytosis uses specific receptors to carry molecules into cell

definintion: vesicles for around particles that need to be expelled from membrane

example: secretion of hormones, cell removing waste