Osmosis 2023

REMEMBER DIFFUSION:

WHICH WAY DO SOLUTES WANT TO MOVE?

FROM ______________ concentration to

______________concentration.

•Most of your body is made of water.
•This water can move into and out of your cells
•When water DIFFUSES through a CELL
MEMBRANE, the process is called OSMOSIS.

WATER ALWAYS MOVES TO WHERE THE SOLUTES ARE. H to L

Multiple Choice

Passive Transport moves molecules with the concentration gradient from

• low to high

• does not move molecules

• high to low

Dropdown

Passive transport uses ​

Select answer

Multiple Select

Select the three types of active transport.

• endocytosis

• exocytosis

• diffusion

• sodium potassium pump

Multiple Select

Select all characteristics that apply to active transport.

• low to high

• no energy

• energy

• high to low

• protein pump

Water is one of the most important molecules in and around cells because of its ability to be a great solvent.

The movement of water into and out of cells is known as osmosis.

Osmosis

Because water is the solvent and not a solute, we have to think about it a bit differently.

Because of this, we say water travels from where it is purest (high concentration) to where it is least pure (low concentration).

Osmosis

Hypertonic
solution=

higher con. of
solutes outside
then inside the cell

So water travels out of the cell towards the less pure solution and the cell
shrinks and shrivels!

Images by Zephyr

Hypotonic solution= lower con. of solutes
outside the cell
than inside of the cell.

So water travels into the cell towards to the less pure solution and the cell

swells and can burst!

Images by Zephyr

Isotonic solution= same con. of solutes inside and outside

So there is movement of water in both directions, and the cell maintains the steady balance of water inside itself.

Images by Zephyr

Which way will the water move?

Drag and Drop

In a hypertonic solution there is a

Placeholder

concentration of of solutes in the solution then inside the cell which causes water to ​

Placeholder

the cell and the cell to ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

higher

leave

shrink

swell

lower

enter

Drag and Drop

In a ​

Placeholder

solution there is an equal concentration of solutes inside and outside the cell which causes water to move ​

Placeholder

directions and the cell stays the ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

isotonic

both

same

hypertonic

hypotonic

one

into

bigger

smaller

Drag and Drop

In a ​

Placeholder

solution there is a lower concentration of solutes in the solution then inside the cell which causes water to move ​

Placeholder

the cell and the cell ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

hypotonic

into

swells

hypertonic

isotonic

shrinks

out of

What happens when you put a saltwater fish in fresh water aquarium…..

Putting a saltwater fish in fresh water aquarium…..

Cells of the fish fill with water, swell, and burst.

What happens when you put a freshwater fish in salt water aquarium…..

Putting a freshwater fish in salt water aquarium…..

Water leaves the cells of the fish, causing them to shrivel (dehydrate), and the fish dies.

•Salt on the skin of a slug causes the fluid from in the slug to rush to the skin to dilute the salt. This causes the slug to become dehydrated and die.

YES! Cell wall does not change but inside of the cell wall does. Take a look at the picture.

​Do plants use osmosis?

Match

Match the following

• using a vacuole to bring particles into the cell, active transport

• removes wastes and other materials from the cell, active transport

• movement of water across the cell membrane, passive transport

• movement of particles (solutes) across a cell membrane, passive transport

• movement from high concentration to low concentration, no energy (ATP) needed

endocytosis

exocytosis

osmosis

diffusion

passive transport

• endocytosis

• exocytosis

• osmosis

• diffusion

• passive transport

Match

Match the following

• movement from low concentration to high concentration, energy (ATP) needed

• solution has more solutes than the cell, water moves out of the cell

• the solution has less solutes than the cell, water moves into the cell

• solution and the cell are the same concentration, water moves equally

• movement through a protein channel from high conc. to low conc., no energy (ATP) needed

active transport

hypertonic

hypotonic

isotonic

facilitated diffusion

• active transport

• hypertonic

• hypotonic

• isotonic

• facilitated diffusion

Please complete the worksheets in your note packet. Pages 17, 18, and 19.