1. Simple Diffusion

2. Simple Diffusion

3. Osmosis- movement of water towards high solute concentration

4. Describe each solution relative to the RBC.

5. In A, how would you describe the solution the cells are in? And in B?

7. Isotonic solution Hypotonic solution Hypertonic solution Animal cell
(A) Normal
(B) Lysed
(C) Shriveled
Plasma
membrane
Plant
cell
Figure 5.5 How animal and plant cells behave in different solutions.
(D) Flaccid
(E) Turgid
(F) Shriveled
(plasmolyzed)

8. Active Transport Move solutes against concentration gradient, [L][H]
Requires energy from ATP (adenosinetriphosphate)
Example, sodium potassium pump, K+ in and Na+ out

9. Active Transport Transport protein Protein changes shape Phosphate
detaches
Solute
Figure 5.8 Active transport of a solute across a membrane. 1
Solute binding 2
Phosphorylation 3
Transport 4
Protein reversion

10. Transport of Large Molecules Across Membranes
Cells rely on:
Exocytosis
Endocytosis
a. phagocytosis
b. pinocytosis
c. receptor-mediated endocytosis

11. Phagocytosis EXTRACELLULAR Food CYTOPLASM FLUID being ingested
Pseudopodium
“Food” or
other particle
Figure 5.9 Three kinds of endocytosis.
Food
vacuole

12. Pinocytosis- material in droplet not regulated
Plasma
membrane
Vesicle
Figure 5.9 Three kinds of endocytosis.
Plasma membrane

13. *human cells use process to take in cholesterol from blood
Plasma membrane
Receptor-mediated endocytosis
Coat protein
Receptor
Coated
vesicle
Coated
pit
Coated
pit
Specific
molecule
Figure 5.9 Three kinds of endocytosis.
Material bound
to receptor proteins
*human cells use process to take in cholesterol from blood

14. Figure 5.9 Three kinds of endocytosis.
Phagocytosis
EXTRACELLULAR
FLUID
CYTOPLASM
Food
being
ingested
Pseudopodium
“Food” or
other particle
Food
vacuole
Pinocytosis
Plasma
membrane
Vesicle
Figure 5.9 Three kinds of endocytosis.
Receptor-mediated endocytosis
Plasma membrane
Coat protein
Receptor
Coated
vesicle
Coated
pit
Coated
pit
Specific
molecule
Material bound
to receptor proteins