1. Brought to you by Mr. _______

2. Cell Transport zThe movement of substances across the ____ ___________. zThere are 2 general categories of cell transport: y________- requires no energy. y________- requires energy.

3. Terms to Know zConcentration gradient- A __________ in the concentration of a substance across a space. zExample: 1 room has many bouncing balls in it. The room next door has none. zEquilibrium- A condition in which the concentration of a substance is _________ throughout a space. zExample: Open the door between the rooms, and the balls will enter the second room.

4. 3 Modes of Passive Transport: z1. _______ _________ z2. _________ z3. Facilitated Diffusion

5. Simple Diffusion zThe movement of a substance from an area of higher concentration ___ an area of lower concentration. zIf diffusion is allowed to continue, _____________ eventually results.

6. Osmosis zThe diffusion of water through a ____________ ____________ membrane.

7. 3 Types of Solutions z1. ____________ z2. Hypotonic z3. Isotonic

8. Hypertonic z Water moves ____ of the cell.

9. Hypotonic z Water moves ____ the cell.

10. Isotonic z Water moves in and out of the cell __________. z The net result is ___ _________. z This is called __________ _____________.

11. Facilitated Diffusion zA carrier protein binds to a specific substance on one side of the cell membrane, _________ it across, and releases it on the other side.

12. Active Transport zThe transport of a substance across the cell membrane ________ its concentration gradient. zThis means the cell is moving substances from an area of low concentration to an area of __________ concentration.

13. Modes of Active Transport z1. Sodium-Potassium Pump z2. Endocytosis y___________ z3. Exocytosis

14. Sodium-Potassium Pump zThis is a special carrier protein. zIt carries __ sodium ions (Na+) out of a cell for every __ potassium ions (K+) it brings into a cell. zBoth Na+ and K+ are going against their concentration gradient. zOccurs only in ____________ cells.

15. Endocytosis zThe movement of a substance ____ a cell by a vesicle. zA vesicle is a small ____ formed by a cell membrane.

16. Phagocytosis zTaking in ________. z“Phago” means “___ _____”.

17. Pinocytosis zTaking in _______. z“Pino” means “__ ________”.

18. Exocytosis zThe movement of a substance by a vesicle to the ________ of a cell.