Download HW_3: Cellular Transport

Cellular Transport (Biology text: pages 201­207) Vocabulary​ (Brownian motion, Diffusion, concentration gradient, dynamic equilibrium, facilitated diffusion, osmosis, isotonic solution, hypotonic solution, hypertonic solution, passive transport, active transport, endocytosis, exocytosis) Part I: Diffusion 1. Movement of substances dissolved in water move constantly in random motion called _______________________________. 2. Describe what is meant by a concentration gradient. 3. The name given to the movement of particles once equilibrium is taking place is ______________________________, where particles continue to … 4. List three factors that affect the rate of diffusion? Explain how these factors affect the rate of diffusion. 5. The name of the ​diffusion process​ across the cell membrane ​where transport proteins​ are used _________________________. 6. Types of transport proteins: 7. Osmosis regulates the movement of ________________ across the cell membrane which is an important factor in maintaining _____________________ within the cell. 8. How is the concentration of a solution described in terms of the ratio of solute (solid particles) to solvent (water)? High? When? Low? When? 9. Water molecules diffuse from areas of ___________ concentration of solution to areas of ____________ concentration of solution. 10. What happens between cells placed in an isotonic solution? (iso= equal) 11. What happens to cells in a hypotonic solution? (hypo=under) 12. How do animal cells and plant cells differ when placed in a hypotonic solution? Part II: Active Transport: 13. List three ways active transport differs from passive transport? 14. List the 6 steps involved with the sodium (Na+) potassium (K+) pump. Also see (​https://www.youtube.com/watch?v=iExyeBwhNjM​) 15. What is the outcome at the end of the sodium (Na+) potassium (K+) pump working a complete cycle? 16. Describe endocytosis and exocytosis?