1. maintaining homeostasis
Cell Transport
maintaining homeostasis
Chapter 7-3 in textbook

2. Cell Membrane ___________what enters and leaves the cell
Cell membrane is surrounded by _______
Phospholipid bilayer

3. Cell Membrane Lipid bilayer Forms by itself in water Proteins attached
_________
_____________

4. Diffusion in cells
When small _______diffuse in and out of the cell to reach ____________ on both side of the membrane

5. Passive Transport Does _____require any _____ Happens ____________
__________ may be used in cell membrane

6. Passive Transport
This type of transport moves from an area of ____ concentration to ____concentration

7. Diffusion Type of ________transport
When ________ move from an area of _____concentration to an area of _____concentration until equilibrium is met

8. Concentration The amount of dissolved ______in a ________
Molecules will move to an area ____ concentrated
Molecules diffuse through the cell membrane of cells

9. Concentration gradient
The _______in concentration in a solution between a cell and its surroundings

10. Concentration Gradient
No gradient - ______distribution
Concentration to the ______
Concentration Gradient

11. Increase Rate of Diffusion
Temperature
Molecules move ______ in _______ temperatures
Pressure
Increasing pressure also ________ rate of diffusion

12. Equilibrium This occurs when there is ____ concentration gradient
Molecules are ______ dispersed but still continue to move randomly

13. Osmosis Diffusion of _______ across a biological membrane
From an area of _____ concentration to _____ concentration of WATER

14. Osmosis in Cells Cells are surrounded by water and filled with water.
Water can move freely through the ________

15. Direction of Osmosis

16. Osmotic Pressure Net movement of ______ into cells
Determined by _______ concentration

17. Osmosis - hypertonic ______ concentration in solution
Ex: a cell in salt water
If molecules are too large to fit through cell membrane or protein channels
______ will diffuse _____ of the cell to reach equilibrium
Cell ______

18. Osmosis - hypotonic _______ concentration in solution
Ex: a cell in pure water
If molecules are too large to fit through cell membrane or protein channels
______ will diffuse _____ the cell to reach equilibrium
Cell ______ - may burst!

19. Osmosis - Isotonic _______ concentration in solution
If molecules are too large to fit through cell membrane or protein channels
______ will diffuse ____ _____ _____of the cell to maintain equilibrium

20. Red Onion Cells - Isotonic

21. Red Onion Cells - Hypertonic

22. Red Onion Cells - Hypotonic

23. Facilitated Diffusion
When the cell membrane has ________ ________ where materials are transported in or out of cell
____ energy needed for this process

24. Active Transport ________ concentration gradient
From an area of ______ concentration to an area of _____ concentration
Requires cell energy (_____) because you’re going ________ concentration gradient

25. Active Transport ______ _______ embedded in cell membrane
Gated channels
_____ energy to open
Protein changes ______ when energy is used

26. Sodium/Potassium Pump
Step 1: 3 Na+ ions bind to ______ ________
Step 2: ____ binds to carrier protein and changes _______ allowing Na+ to move _____ of the cell
Step 3: 2 K+ ions move _____ carrier protein
Step 4: ____ binds to carrier protein and changes ______ allowing K+ to move _____ the cell

27. Movement in Vesicles Endocytosis - ______ the cell
Cell membrane is used to create a vesicle around particles
Phagocytosis
________ ingestion
Pinocytosis

28. Movement in Vesicles Exocytosis - _____ of the cell
Vesicles created in the cell fuse with cell membrane and release particles/liquids
Known as bulk transport