Water Potential and Osmosis

Osmosis is the movement of ____ from a region of _____ to a region of _____, through a _____.

• substances, higher concentration, lower concentration, concentration gradient

• water molecules, higher water potential, lower water potential, partially permeable membrane

• water molecules, higher concentration, lower concentration, partially permeable membrane

Which side of the solution has a higher water potential? What about concentration?

• Left: higher water potential, right: higher concentration

• Left: higher concentration, right: higher water potential

Tags

NGSS.MS-LS2-3

In which direction will water move?

• Into the cell

• Out of the cell

• Equally in & out

• There is no water

A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?

• Salt moved out of the lettuce cells by diffusion.

• Water moved into the lettuce cells by osmosis.

• Salt moved into the lettuce cells by diffusion.

• Water moved out of the lettuce cells by osmosis.

What is the direction of osmosis?

• From the left to the right.

• From the right to the left.

• There is no direction as osmosis is not occurring.

What differentiates osmosis from diffusion?

• Direction of movement of substances

• Substance transported

• Presence of partially permeable membrane

• Energy reqiurement

A solution that has a high concentration of water molecules has...

• great water potential

• super water potential

• high water potential

• excellent water potential

Tags

NGSS.MS-LS2-3

Draw an animal cell that has been put in pure water and indicate the net movement of water molecules with an arrow. Label with: high water potential, low water potential... Draw a cell that is either shriveled up or bursting.

Tags

NGSS.MS-LS1-2

What will happen if we put an animal cell in pure water?

• water will move out of the cell by osmosis and cell will shrivel up

• water will not move either way by osmosis and cell stays as is

• water will move into the cell by osmosis and cell will swell and burst

• water will move away by osmosis and cell will dry out and die

Tags

NGSS.MS-LS1-2

Which part of a cell is partially permeable?

• cell wall

• cell membrane

• chloroplast

• nucleus