OSMOSIS IN MY HAND

OSMOSIS IN MY HAND

BY
SUMATHY A/P RAGHAVAN

OBJECTIVE

HELP STUDENTS TO:

 IDENTIFY HYPOTONIC AND HYPERTONIC SOLUTION
BASED ON THE CONCENTRATION OF SOLUTE

 DETERMINE THE DIRECTION OF WATER DIFFUSION
IN HYPOTONIC AND HYPERTONIC SOLUTION

 DETERMINE THE EFFECT OF HYPOTONIC AND
HYPERTONIC SOLUTION ON ANIMAL AND PLANT
CELLS

IDENTIFY THE TYPE OF SOLUTION

HYPOTONIC SOLUTION

THE LETTER ‘O’ IS CHOOSEN TO REPRESENT
HYPOTONIC SOLUTION

HYPERTONIC SOLUTION

THE LETTER ‘E’ IS CHOOSEN TO REPRESENT
HYPERTONIC SOLUTION

IDENTIFING HYPOTONIC SOLUTION

A Fist is chosen to represent O = Hypotonic solution
A fist has a Small surface area = Low concentration

Hypotonic solution
EXAMPLE : DISTILLED WATER

IDENTIFING HYPERTONIC SOLUTION

An opened hand is chosen to represent E = Hypertonic solution
An open hand has Big surface area = high concentration
Hypertonic solution
EXAMPLE : 30% SUCROSE SOLUTION

DETERMINE THE DIRECTION OF WATER
DIFFUSION IN HYPOTONIC SOLUTION

The fingers show the direction of water diffusion.
When a cell is immersed in Hypotonic solution,
water molecules diffuse into the cell/ vacuole

DETERMINE THE DIRECTION OF WATER
DIFFUSION IN HYPERTONIC SOLUTION

The fingers show the direction of water diffusion.
When a cell is immersed in Hypertonic solution,
water molecules diffuse out from the cell/ vacuole

EFFECT OF HYPOTONIC AND HYPERTONIC
SOLUTION ON LIVING CELLS

THE RULES :

 IF YOU START WITH A FIST, YOU WILL END WITH AN OPEN
HAND

 IF YOU START WITH AN OPEN HAND, YOU WILL END WITH
A FIST

 THE BEGINNING POSITION IS BASED ON THE TYPE OF
SOLUTION

EFFECT OF HYPOTONIC SOLUTION
ON LIVING CELLS

Beginning /Initial Ending/Final

 When a cell is immersed in a Hypotonic solution, you should

start with a fist to represent Hypotonic solution.
 The fingers show the direction of water diffusion; water

molecules diffuse into the sell/vacuole
 The cell/vacuole expands(end)

EFFECT OF HYPERTONIC SOLUTION
ON LIVING CELLS

Beginning /Initial Ending/Final

 When a cell is immersed in a Hypertonic solution, you should

start with an open hand to represent Hypertonic solution.
 The fingers show the direction of water diffusion; water

molecules diffuse out of the sell/vacuole
 The cell/vacuole shrink(end)

EFFECT OF HYPOTONIC AND HYPERTONIC
SOLUTION ON A STRIP OF MUSTARD STEM

THE RULES :

 THE RULES ARE THE SAME AS THE EFFECT OF
HYPOTONIC AND HYPERTONIC SOLUTION ON LIVING
CELLS BUT THE OBSERVATION IS MADE FROM THE
SIDE

EFFECT OF HYPOTONIC SOLUTION
ON A STRIP OF MUSTARD STEM

Beginning /Initial Ending/Final

 THE BACK OF THE HAND IS CONSIDERED AS THE

EPIDERMIS(OUTER LAYER)
 SO, IN HYPOTONIC SOLUTION THE STRIP CURVE OUTWARDS

EFFECT OF HYPERTONIC SOLUTION
ON A STRIP OF MUSTARD STEM

Beginning /Initial Ending/Final

 THE BACK OF THE HAND IS CONSIDERED AS THE

EPIDERMIS(OUTER LAYER)
 SO, IN HYPERTONIC SOLUTION THE STRIP CURVE INWARDS

THANK YOU