Cell Transport Vocabulary

diffusion of molecules assisted by protein channels that pierce a cell membrane

• osmosis

• diffusion

• passive transport

• facilitated diffusion

movement of molecules across the cell membrane without energy input from the cell

• active transport

• passive transport

• diffusion

• osmosis

diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration

• diffusion

• facilitated diffusion

• passive transport

• osmosis

solution that has an equal concentration of dissolved particles compared with another solution

• hypertonic

• isotonic

• hypotonic

• solution

 uptake of liquids or large molecules into a cell by inward folding of the cell membrane to create a vesicle

• active transport

• exocytosis

• endocytosis

• sodium-potassium pump

energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration

• endocytosis

• active transport

• exocytosis

• passive transport

solution that has a lower concentration of dissolved particles compared with another solution

• hypertonic

• hypotonic

• isotonic

• solute

movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration

• active transport

• osmosis

• diffusion

• facilitated diffusion

solution that has a higher concentration of dissolved particles compared with another solution

• solvent

• isotonic

• hypotonic

• hypertonic

difference in the concentration of a substance from one location to another

• homeostasis

• concentration gradient

• resting potential

• hypotonic