Osmosis

Osmosis is the movement of _____ across a selectively permeable membrane.

• food

• energy

• oxygen

• water

What is Osmosis?

• movement of water from equal concentrations

• movement of water through a selectively-permeable membrane from high to low water concentration.

• Movement of water high to low water concentration

• movement of water through a selectively-permeable membrane from low to high water concentration.

What in the cell is selectively permeable?

• cell membrane

• cell wall

• cytoplasm

• nucleus

Tags

NGSS.MS-LS1-2

Which of the following does not have a cell wall?

• animal cells
• bacteria cells
• plant cells
• fungi

Tags

NGSS.MS-LS4-2

The diagram shows two chambers with different concentration of molecules separated by a selectively permeable membrane. Predict what will happen to the water molecules ?

• move from B to A due to diffusion

• move from B to A due to osmosis

• move from B to A due to active transport

• move from A to B due to osmosis

 An animal cell placed in a hypertonic (salty) solution will

• Stay the same
• Shrink- get smaller
• Swell- get bigger

Tags

NGSS.MS-LS1-5

If a cell is placed in a hypotonic solution, the cell will _______.

• stay the same
• swell (get bigger)
• shrink (get smaller)

Tags

NGSS.MS-LS1-5

Where will the water go?

• Into the cell

• Out of the cell

• Equally in & out - it's isotonic

• There is no water

Tags

NGSS.MS-LS1-2

NGSS.MS-LS2-3

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?

• Water moved into the lettuce cells by active transport.
• 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.

Tags

NGSS.MS-LS2-1

If the dots represent sugar what direction will the water flow?

• Into the cell

• Out of the cell

• Both equally (equilibrium)

Tags

NGSS.MS-LS1-2