Cell Membrane Osmosis Diffusion

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

Diffusion and Osmosis are examples of...

• Active Transport

• Passive Transport

_______ regulates what enters and leaves a cell.  

• Cell Membrane

• Nucleus

• Mitochondria

• Cytoplasm

Osmosis is specifically.....

• diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration

• the diffusion of particles from an area of high concentration to an area of low concentration

• diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration

• the diffusion of particles from an area of low concentration to an area of high concentration

During diffusion

• substances (things) moves from high to low concentration

• water moves when energy is used

• large or oddly shaped molecules move across a cell membrane

• water moves from high to low concentration

What is diffusion?

• When molecules move from a low concentration to a high concentration

• When molecules move from a high concentration to a low concentration.

• When there is no movement of molecules

• When molecules move everywhere regardless of concentration

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Movement of solute, NOT WATER, through the cell membrane from high to low concentration.

• diffusion

• active transport

• facilitated diffusion

• osmosis

Plasma membranes are selectively permeable. This means

• All molecules can pass in and out of the cell

• Only certain substances are able to pass in and out of the cell

• Only water is able to pass through the cell

• Molecules that are not needed by the cell cannot pass through

Tags

NGSS.MS-LS1-2

What is another term for "selectively permeable"?

• porous

• completely permeable

• permanent

• semipermeable

The function of the plasma membrane is....

• to regulate what enters and leaves the cell.

• fight bacteria and viruses that enter the cell.

• provide rigid support and protection to the cell.

• make sure each cell can move

Tags

NGSS.MS-LS1-2