Cell at Work

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 concentrations

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

Tags

NGSS.HS-LS2-3

What in the cell is selectively permeable?

• Cell membrane

• Cell wall

• Cytoplasm

• Nucleus

Tags

NGSS.HS-LS2-3

Which of the following does not have a cell wall?

• Animal cells

• Bacteria cells

• Plant cells

• Fungi

An animal cell placed in a hypertonic solution will

• Stay the same

• Shrink

• Swell

Tags

NGSS.HS-LS1-3

If a cell is placed in a hypotonic solution, the cell will __________

• stay the same

• swell

• shrink

Where will the water go?

• Into the cell

• Out of the cell

• Equally in and 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 this 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.HS-LS1-3

What is tonicity?

• A measure of the difference in solute concentration between two solutions separated by a semi-permeable membrane.

• A measure of the difference in solute concentration between two solutions.

• A measure of the difference in solute concentration between two solutions separated by an impermeable membrane.

• A measure of the difference in water concentration between two solutions separated by an semi-permeable membrane.

Transport that does not require energy is

• Active

• Passive

• Isotonic

• Facilitated

Moving along a concentration gradient means that solutes

• move from a high concentration to low concentration

• move from a low concentration to high concentration

• do not move