S2E5: Osmosis Do This: Have Reading Qs 3.3 ready to grade

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S2E5: Osmosis Do This: Have Reading Qs 3.3 ready to grade Series: Cells S2E5: Osmosis Objective: Explain how water moves across a semipermeable membrane Do This: Have Reading Qs 3.3 ready to grade

Passive Transport

Passive Transport Osmosis and diffusion are types of passive transport

Passive Transport Osmosis and diffusion are types of passive transport Does not require energy

B. Diffusion

B. Diffusion Movement of molecules across a semipermeable membrane

b. Molecules diffuse down a concentration gradient.

b. Molecules diffuse down a concentration gradient. Concentration gradient: gradual difference in amount of molecules

C. Osmosis

C. Osmosis Movement of water to areas of higher solute concentration

b. Types of solutions:

b. Types of solutions: Hypertonic: more solutes in the solution relative to the cell

b. Types of solutions: Hypertonic: more solutes in the solution relative to the cell “hyper” = more

2. Hypotonic: less solutes in the solution relative to the cell

2. Hypotonic: less solutes in the solution relative to the cell “hypo” = less

3. Isotonic: equal solutes both outside and inside

3. Isotonic: equal solutes both outside and inside “iso” = same

Osmosis Lab Complete the Osmosis Lab. Due by the end of the period. Season Finale!! (aka Quiz next class) Review homework

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