Homeostasis and Cell Transport

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Sodium-Potassium Pump • Transports Na+ and K+ ions up the concentration gradient. • At top speed, the pump can transport about 450 Na+ ions and 300 K+ ions per second. • The exchange of 3 Na+ ions for 2 K+ ions creates a positively charged environment outside the cell membrane and negatively charged inside the membrane. • Important t for the conduction of electrical l impulses along nerve cells.
Movement in Vesicles Endocytosis: process by which cells ingest external fluid, macromolecules, l and large particles, including other cells. •External materials are enclosed by a portion of the cell’s membrane, which folds itself and forms a pouch. •The pouch pinches off from the cell membrane and becomes a vesicle. •Some vesicles fuse with lysosomes. •2 types: pinocytosis phagocytosis
Page 1 and 2: Homeostasis and Cell Transport Chap
Page 3 and 4: Cellular Transport
Page 5 and 6: Diffusion The movement of particles
Page 7 and 8: Hypotonic When the concentration of
Page 9 and 10: Isotonic When the concentration of
Page 11 and 12: Turgor Pressure The pressure that w
Page 13 and 14: Facilitated Diffusion The transport
Page 15: Active Transport Energy in the form
Page 19 and 20: Phagocytosis Movement of large part

Homeostasis and Cell Transport

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