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Passive and Active Transport Quiz/Test 1. The movement of substances from an area of high concentration to an area of low concentration or down its concentration gradient is known as what? a. Diffusion 2. In this system water molecules in cell 4 are most likely to move into which cell? a. Cell 2 3. Which cell is most likely to gain both water molecules and solute molecules as the system approaches equilibrium? a. Cell 1 4. Which direction are the solute molecules in this system most likely to diffuse? a. From 2 to 1 and from 4 to 3 5. Sugar molecules can enter the cell through what process? a. Facilitated diffusion 6. Give an example of a type of transport that does not require energy. a. Passive, diffusion, osmosis, ion channels, facilitated diffusion 7. Give an example a type of transport that requires energy. a. Active, sodium potassium pump, exocytosis, endocytosis, receptor protein 8. What is the movement of water across the membrane called? a. Osmosis 9. What direction does sodium-potassium pump usually pump sodium and potassium? a. 3 sodium ions out and 2 potassium ions in the cell 10. Removing materials from the cell by vesicles fusing with the membrane is called? a. exocytosis 11. What will happen cell is placed in a hypertonic solution? a. It will shrink because water leaves the cell 12. When the cell engulfs a solid this is know as cell eating or what? a. Phagocytosis 13. When the cell engulfs a liquid this is known as cell drinking or what? a. Pinocytosis’ 14. What is the source of energy for active transport? a. ATP 15. What type of proteins act like selective passageways in the cell membrane? a. channel proteins 16. Both active transport and facilitated diffusion use what? a. carrier proteins 17. If a cell is placed in a solution and the cell swells what type of solution is it? a. hypotonic 18. If a cell is placed in a solution and the cell shrinks what type of solution is it? a. hypertonic 19. What type of solution causes the cell to remain the same size? a. isotonic 20. What is one way a receptor protein can cause the cell to respond? a. change of membrane permeability, make a second messenger, act as an enzyme 21. In diffusion substances move from an area of high concentration to an area of low concentration until what is reached? a. equilibrium 22. The cell membrane is known as because it only lets some substances into the cell. a. selectively permeable