Osmosis in Cells

Osmosis in Cells

Osmosis is the passive movement of water (no ATP) across a semipermeable membrane to reach equilibrium.

Moves from an area of high concentration of water to an area of low concentration of water

Water Movement- the ability to predict which direction the water will move in a system is important in health care.

When deciding the direction water will move, you must first identify the area of high concentration (of water) and the area of low concentration (of water). Then draw an arrow from high to low.

A cell is placed into a solution where there is a higher concentration water outside the cell.

Which way will the water move?

Start by identifying where there is a higher concentration of water a write an H, then do the same with low concentration and identify with an L.

A cell is placed into a solution where there is a higher concentration water outside the cell.

Which way will the water move?

The water will move INTO the cell to reach equilibrium (where concentrations are equal on BOTH sides of the membrane)

​H

​L

Labelling

A cell has been provided. Identify the areas of high and low concentration using the information below.

A cell is placed into a solution where it gained water.

Drag labels to their correct position on the image

Low

High

Multiple Choice

For the last problem, identify the direction the water will move.

A cell is placed into a solution where it gained water.

• Into cell

• Out of cell

• No net movement of water

Labelling

A cell has been provided. Identify the areas of high and low concentration using the information below.

A cell was placed into a solution that has a lower concentration of water.

Drag labels to their correct position on the image

Low

High

Multiple Choice

For the last problem, identify the direction the water will move.

A cell was placed into a solution that has a lower concentration of water.

• Into cell

• Out of cell

• No net movement of water

Labelling

A cell has been provided. Identify the areas of high and low concentration using the information below.

A cell that is 86% water is placed into a solution that is 20% water.

Drag labels to their correct position on the image

High

Low

Multiple Choice

For the last problem, identify the direction the water will move.

A cell that is 86% water is placed into a solution that is 20% water.

• Into cell

• Out of cell

• No net movement of water

Labelling

A cell has been provided. Identify the areas of high and low concentration using the information below.

A cell is placed into a solution that has a lower concentration of solutes (dissolved substances) and higher concentration of water than inside the cell.

Drag labels to their correct position on the image

Low

High

Multiple Choice

For the last problem, identify the direction the water will move.

A cell is placed into a solution that has a lower concentration of solutes (dissolved substances) and higher concentration of water than inside the cell.

• Into cell

• Out of cell

• No net movement of water

Labelling

A cell has been provided. Identify the areas of high and low concentration of water using the information below.

A cell with 5% protein concentration is placed into a solution that has a 12% protein concentration.

Remember, you are tracking water movement.

Drag labels to their correct position on the image

High

Low

Multiple Choice

For the last problem, identify the direction the water will move.

A cell with 5% protein concentration is placed into a solution that has a 12% protein concentration.

• Into cell

• Out of cell

• No net movement of water

Osmotic Solutions

Multiple Choice

A cell with 9% salt concentration is placed into a solution that has a 5% salt concentration.

Which answer best describes the type of solution and what happens to the shape of the cell.

• Hypertonic-cell will shrink

• Hypertonic-cell will swell

• Hypotonic-cell will shrink

• Hypotonic-cell will swell

• Isotonic-cell shape will remain the same

Multiple Choice

A cell with 13% glucose concentration is placed into a solution that has a 23% glucose concentration

Which answer best describes the type of solution and what happens to the shape of the cell.

• Hypertonic-cell will shrink

• Hypertonic-cell will swell

• Hypotonic-cell will shrink

• Hypotonic-cell will swell

• Isotonic-cell shape will remain the same

Open Ended

Real Life Scenario:
A patient comes into the ER suffering from dehydration after hiking in the Florida sun all day. Their cells are dehydrated because they have lost so much water due to sweating that their cells have minimal water compared to the hiker’s bloodstream. The doctors need to administer fluids to restore the balance.

Question: Should the doctors give the patient a hypertonic, hypotonic, or isotonic IV solution to rehydrate the cells? (Ivs inject directly into the bloodstream) Explain how you determined your answer.

Answer the following on PG 25

Real Life Scenario:
When you drink a glass of water, most of it is absorbed into your bloodstream by osmosis through cells lining your small intestine.  Drinking seawater can actually dehydrate the body.  How?

Answer the following on PG 25

Real Life Scenario:
You are a nurse working in the ER.  A patient in your care has suffered severe burns, and you need to replenish his body fluids using an IV.  A trainee suggests that you use distilled water, since it is pure water and contains no solutes(dissolved substances like salt).  She thinks this will help avoid infection.  Explain why this is a bad idea.

Answer the following on PG 25

Real Life Scenario:
Instead of distilled water, you will use an IV containing Ringer’s solution.  Ringer's solution is a solution of several salts dissolved in water for the purpose of creating an isotonic solution relative to the body fluids of an animal. Explain why Ringer’s solution is an acceptable fluid to administer to a patient.