Osmosis

Open Ended

What is homeostasis?

Multiple Choice

Which cell structure helps the cell maintain homeostasis?

• Mitochondria

• Cell Membrane

• Nucleus

• Ribosome

Molecules will continue to move around until they are equal in both areas.

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​Equilibrium = Homeostasis

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Reorder

Diffusion is the movement of molecules from an area of __(1)___ concentration to an area of __(2)__ concentration. Diffusion required NO __(3)__.

• high

• low

• energy

1

2

3

• 1
• 2
• 3

Draw

Draw a circle around simple diffusion.

Draw a triangle around facilitated diffusion.

​Diffusion and osmosis
are passive processes. They
don't require
energy.

​Osmosis is the diffusion of water from a high water concentration to a low water concentration across a semi-permeable membrane

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Multiple Choice

In osmosis the water concentration is moving from....

• High water concentration to low water concentration

• High water concentration to high water concentration

• Low water concentration to high water concentation

• low water concentration to low water concentation

Multiple Choice

In osmosis, water moves across the cell membrane into the _____________________ concentration.

• high solute

• low solute

• equal solute

• no solute

Multiple Choice

Which statement describes the process of osmosis in an animal cell?

• Sugar molecules move across the plasma membrane until the cell has enough energy to grow in size and divide.

• Water molecules move across the plasma membrane until solute concentrations are equal on both sides of the membrane.

• Ions move across the plasma membrane until the inside of the cell has a higher concentration of positive charges.

• Enzymes move across the plasma membrane until the cell has completed metabolism.

Multiple Choice

The picture shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment.

What conditions cause the contractile vacuole to fill with water?

• The concentration of water is greater outside the cell than inside the cell.

• The temperature of water in the vacuole is higher than the temperature of its environment.

• The concentration of water inside the cell is the same as the concentration outside the cell.

• The temperature of water in the vacuole is lower than the temperature of its environment.

Match

Match the following

Hypotonic

Isotonic

Hypertonic

• Hypotonic

• Isotonic

• Hypertonic

Open Ended

What is the difference between Hypertonic and Hypotonic?

(Use complete sentences)

Open Ended

What is Osmosis?

(Use complete sentences)

Match

Match the following

• Hypertonic

• Isotonic

• Hypotonic

The solution has a higher concentration of solute than the cell. Water will move out of the cell

The solution has the same concentration of solute as the cell. No net movement of water

The solution has a lower concentration of solute than the cell. Water will move into the cell

• The solution has a higher concentration of solute than the cell. Water will move out of the cell

• The solution has the same concentration of solute as the cell. No net movement of water

• The solution has a lower concentration of solute than the cell. Water will move into the cell