Aim #30: How does osmosis and diffusion compare?

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Aim #30: How does osmosis and diffusion compare? Date: November 24, 2015 Aim #30: How does osmosis and diffusion compare? HW: Cell Web Quest due Tuesday 12/1 QUIZ- Tuesday/Wednesday (Aim #’s 24-26) Unit 3 Test- Monday (12/7)/Tuesday (12/8) Do Now: Warm-Up Notebook Date Title of Activity Page # 11/24 Cellular Transport 2 53

Aim #30: How does osmosis and diffusion compare? Date: November 25, 2015 Aim #30: How does osmosis and diffusion compare? HW: Cell Web Quest due Tuesday 12/1 Microscope Lab due next week! Unit 3 Test- Monday (12/7)/Tuesday (12/8) Do Now: Warm-Up Notebook Date Title of Activity Page # 11/25 Plant vs. Animal Cells 54

Aim #30: How does osmosis and diffusion compare?

What is the diffusion of water called? Osmosis

What is meant by concentration? Solvent: The liquid (ex. Water) Solute: The solid added to the liquid (salt/sugar) Distilled water 100% pure water What happens when we add a SOLUTE like salt or sugar?

3) Concentration Differences: a) A 90% salt solution vs. a 20% salt solution 90% Salt Solution i. Which solution has more salt particles? 20% Salt Solution ii. Which solution has more water molecules? b) A 60% salt solution vs. 80% salt solution? 80% Salt Solution i. Which solution has more salt particles? 60% Salt Solution ii. Which solution has more water molecules?

Which container has a greater concentration of water molecules? = Solute (salt) = Solvent (water) Which container has a greater concentration of solute molecules?

In which direction is osmosis going to occur? = Solute (sugar) = Solvent (water) Selectively Permeable

Why does this happen?

Why are the water molecules diffusing to the left? Water molecules are red

4) What is a hypotonic solution? Contain a low concentration of solute relative to another solution (e.g. the cell's cytoplasm) When a cell is placed in a hypotonic solution, the water diffuses into the cell, causing the cell to swell Example: Red Blood Cell in Distilled Water

5) What is an isotonic solution? Contain the same concentration of solute as an another solution (e.g. the cell's cytoplasm) When a cell is placed in an isotonic solution, the water diffuses into and out of the cell at the same rate Example: The fluid that surrounds the body cells

6) What is a hypertonic solution? Contain a high concentration of solute relative to another solution (e.g. the cell's cytoplasm) When a cell is placed in a hypertonic solution, the water diffuses out of the cell, causing the cell to shrink Example: elodea in salt water

Will osmosis happen?

In which direction will osmosis happen?

What was in the solution that made this happen to the cells?

How is osmosis a form of passive transport? Osmosis is the movement of water from an area of high concentration to an area of low concentration. No ATP needed.

Amoeba Sisters Video (9:27) https://www. youtube. com/watch