Puzzle Solution – Cell Membranes Homeostasis & Transport Answer Key Phrase: Concentration gradients cause molecules to move Terms: passive transport cell membrane homeostasis diffusion kinetic equilibrium molecules osmosis energy hypotonic hypertonic cytosol isotonic contractile vacuoles water pump movement turgor pressure plasmolysis cytoplysis plant cell animal cell carrier protein facilitated diffusion ion channel sodium active transport sodium potassium pump exocytosis endocytosis vesicle pinocytosis phagocytosis