1) what’s in the bottles (from yesterday)? - describe (draw and write)

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J 1) What’s in the bottles (from yesterday)? - Describe (draw and write). - Why does this happen (use polar / non-polar )? 2) Membrane model: Write as many observations you can possibly see.

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1) What’s in the bottles (from yesterday)? - Describe (draw and write). - Why does this happen (use polar / non-polar )?. J. 2) Membrane model: Write as many observations you can possibly see. Considering the bubble lab: 1. Describe the soap film. - PowerPoint PPT Presentation

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Page 1: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

J1) What’s in the bottles (from yesterday)? - Describe (draw and write).- Why does this happen (use polar / non-polar)?

2) Membrane model: Write as many observations you can possibly see.

Page 2: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Considering the bubble lab:1. Describe the soap film.2. Describe what happened when you used:A. Dry Pencil, B. Wet Pencil, C. Wet tube with pencil, D. Wet thread-ring.3. Which characteristics of the membrane were demonstrated? At least 3.

Page 3: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Demonstration: 3 beakers and food coloring…

1. Describe (draw + write):- What happens to the food

coloring?- What is the difference

between the beakers? 2. What could be the reason

for this difference?

Page 4: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Membrane Function

Part One: Diffusion of particles across the membrane.

Hydro-philic

Hydro-phobic

Water

Water

Page 5: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Solvent: Fluid Substance that is present in large amount (water, oil)Solute: Substance that is in small amount and mixed into the solvent. (food coloring, paint, sugar..)Solution: Solute mixed into solventConcentration: Amount of solute in unit volume of solvent.

Page 6: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Diffusion and OsmosisDiffusion

•Particles move randomly as fast as the temperature allows.

Concentration: Amount of particles per unit volume

Solvent (water)

Solute (sugar, salt, etc)

Notes

Diffusion Simulation

Solution

Diffusion Simulation, Circles, Temperature

Page 7: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Particles move from high to low concentrations

Diffusion Simulation

Diffusion Open Memb

Example:

(Particles move down the concentration gradient).

Notes

Diffusion Animation Stolaf

Page 8: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Two eggs two solutions:

The eggs you are looking at were de-shelled with vinegar. They were then dipped overnight – one in syrup and one in water.

1.Draw what you see. Describe.2.Where to did the water move?3.Which egg was dipped in

syrup/water? How can you tell?

Page 9: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

We divide all the particles to four major groups:

UnchargedPolar

Charged(“super-polar”)

+ -

Large(proteins)

Non-polar (lipids)

Pass freely:

H2O IonsNa+ Cl-

Need help to pass:

Page 10: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Biological membranes are

semi-permeablePass easily:

-Small molecules-Non-charged particles

-WATER!

Pass only with help: -Large particles

-Ions ?

Notes

+-

Page 11: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Osmosis

Osmosis Simulation

* Osmosis is the movement of water through a semi-permeable membrane.

Osmosis Semipermeable Memb

* Water moves (diffuses) until the concentrations are balanced.

Notes

Osmosis Animation - before and After salt

Page 12: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Handout exercise

Page 13: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Before the journal…

Handout: All three situations are unstable. On the right side draw in the particles and the water level after time passed for diffusion/osmosis to occur.

Page 14: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Two eggs two solutions:

The eggs you are looking at were de-shelled with vinegar. They were then dipped overnight – one in syrup and one in water.

1.Draw what you see. Describe.2.Where to did the water move?3.Which egg was dipped in

syrup/water? How can you tell?

Page 15: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

1) Complete the drawing on the right of the cup:Since sugar cannot pass through, the water can and will pass. But to what direction?

2) Describe in words what happened to the water, and why.

Page 16: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Sugar Water

Page 17: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Isotonic – solutions with equal concentration.

When comparing two solutions to one another, we define:

A. B.

Osmosis Simulation

Hypotonic solution has a lower solute concentration

Hypertonic solution has a higher solute concentrations

Page 18: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

In osmosis water moves from a hypo-tonic solution to a hyper-tonic solution

A. B. Water movement

Page 19: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

1) Add the new terms to the drawing of the cup.

2) Back to the egg….:Draw the egg that was dipped in

syrup right after it was dipped.Label it – where was it hypo-,

hyper- or iso- tonic?3) Draw the egg after staying

overnight in syrup- label hypo-, hyper-, iso- tonic.

Page 21: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Hypertonic

H2O

Egg in Syrup

isotonic

Hypotonic

Page 22: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

H2O

Egg in Syrup

isotonic

Page 23: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Hypotonic

Hypertonic

H2O

Egg in Water

isotonic

Page 24: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

H2O

Egg in Water

Page 25: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Writing exercise:Draw the 3rd example from the handout. • Label: Hypertonic, Isotonic, Hypotonic, semi-permeable membrane, concentration gradient.• In essay format: Tell what happened in the experiment, why.• Peer (neighbor) review.

Page 26: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

1)How would you prefer to store a salad – with or

without dressing? Why?

2) What happens when you add sugar to strawberries? Why does it happen? (use “Osmosis”)

Page 27: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

And why are we learning this??To Explain:•Why can we safely store jam at room temperature.•Why do marine fish die in freshwater, and visa versa?•How can we desalinate sea water?•Why better store salad without dressing? And more…..

Page 28: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Quiz

Page 29: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Preparing for the Dialysis Lab

Dialysis – Filtration of liquids through an artificial membrane (bag).

Materials that will be added:Sugar ( ), Starch ( ….)Iodine ( ) Water ( )

1.Which will pass through the holes ?

2. How can we tell if they passed or not?

Page 30: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Observe the dialysis tubing from yesterday’s lab.

1) Describe (Draw, write) what you see, as detailed as possible:

2) Which materials passed through, in what direction, and how could you tell?

3) Copy the following data chart..

Page 31: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

DATA TABLE Before After

Water: Volume changes in the ‘cell’

_______________________________ml

Iodine staining inside the ‘cell’ (Yes/No)

Iodine color outside the ‘cell’ (Yes/No)

Starch outside the ‘cell’

Sugar outside the ‘cell’: (Color; Yes/No)

Color: Yes/No

Color: Yes/No

Page 32: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Kidney tutorial and animation

A Youtube about the kidneys

Page 33: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Explain the following processes:Wilting of salads when stored in

dressing

• Putting an animal cell in a hypo-tonic solution? –What would happen?

B. Putting an animal cell in a hyper-tonic solution? What would happen?

Collapse of Blood Cell

Rupture of a blood cell

C. Putting a plant cell in a hypo-tonic solution? What would happen?

Page 34: 1)  What’s in the bottles (from yesterday)?  - Describe (draw and write)

Why are concentrated jams or juices safe to store without cooling?

Or… Which of the following must you store in the refrigerator? Vinegar, jam, flour, candy, meat, diluted juice, concentrated juice,…Why?