Break into your lab groups and look Break into your lab groups and look at the 5 choose your transport cards at the 5 choose your transport cards on your lab table. on your lab table.

Identify if the card is an Identify if the card is an example of: example of:

Diffusion, Osmosis or Diffusion, Osmosis or Active Transport Active Transport

Read pages 76 and 77 of Read pages 76 and 77 of the Holt textbook and use the Holt textbook and use the information to create the information to create the tri-fold described on the tri-fold described on the next slide.the next slide.

On the top of each tab, write a On the top of each tab, write a description of what is happening to the description of what is happening to the cell if placed in that particular cell if placed in that particular environment. On the bottom of the environment. On the bottom of the tab, draw a picture of how water is tab, draw a picture of how water is moving in and out of the cell. moving in and out of the cell.

10% NaCl10% NaCl90%H90%H22OO

10% NaCl10% NaCl90%H90%H22OO

NO NET NO NET MOVEMENT - MOVEMENT - cell stays the cell stays the samesame

10% NaCl10% NaCl90%H90%H22OO

20% NaCl20% NaCl80%H80%H22OO

More More water water moves into moves into the than the than leaves the leaves the cell cell causing it causing it to swell.to swell.

15% NaCl85%H2O

5% NaCl95%H2O

More More water water moves out moves out of the cell of the cell than into than into the cell the cell causing it causing it to shrink.to shrink.

An osmosis investigation was conducted using chicken eggs to represent cells with semipermeable membranes. The mass of each egg was measured to determine how much water diffused into or out of the eggs. The eggs were first soaked in vinegar to dissolve the shell. Each egg was then placed in one of three different solutions for 24 hours.

Vinegar85% water

Corn Syrup5% water

Distilled Water

100% water

Based on your knowledge of Based on your knowledge of osmosis and the way water osmosis and the way water molecules move in various molecules move in various solutions, what would happen if solutions, what would happen if you took a fish from the ocean you took a fish from the ocean (salt water) and placed it in a (salt water) and placed it in a fresh water lake?fresh water lake?

Because it would be going from an Because it would be going from an environment high in solute to an environment high in solute to an

environment much lower in solute, environment much lower in solute, the fish would swell and die.the fish would swell and die.

What is an Isotonic Solution?What is an Isotonic Solution?

In an isotonic solution, the In an isotonic solution, the concentration of dissolved concentration of dissolved

substances in the solution is substances in the solution is the same as the concentration the same as the concentration of dissolved substances inside of dissolved substances inside

the cell.the cell.

What happens to a cell when What happens to a cell when placed in an isotonic Solution?placed in an isotonic Solution?

The cell remains unchangedThe cell remains unchanged

What is an Hypotonic Solution?What is an Hypotonic Solution?

In an hypotonic solution the In an hypotonic solution the concentration of dissolved concentration of dissolved substances is lower in the substances is lower in the

solution outside the cell than solution outside the cell than the concentration inside the the concentration inside the

cell.cell.

What happens to a cell when What happens to a cell when placed in an Hypotonic Solution?placed in an Hypotonic Solution?

The cell will swellThe cell will swell

What is an Hypertonic Solution?What is an Hypertonic Solution?

In an hypertonic solution the In an hypertonic solution the concentration of dissolved concentration of dissolved

substance outside the cell is substance outside the cell is higher than the concentration higher than the concentration

inside the cell.inside the cell.

What happens to a cell when What happens to a cell when placed in an Hypertonic Solution?placed in an Hypertonic Solution?

The cell will shrinkThe cell will shrink