Understanding Osmosis

The video explains how water fills a glass by turning on a faucet, drawing a parallel to how cells gain water through osmosis. Osmosis is the diffusion of water across a cell membrane from an area of higher concentration to lower concentration. An example is given with a cell in saltwater, where water flows out of the cell, causing it to shrink.

What action is similar to how cells gain water?

• Turning on the faucet

• Closing a door

• Opening a window

• Turning on a light

What is the process called when water moves across a cell membrane?

• Diffusion

• Condensation

• Osmosis

• Evaporation

In osmosis, water moves from an area of:

• Lower concentration to higher concentration

• Higher concentration to lower concentration

• No concentration to high concentration

• Equal concentration to equal concentration

What happens to a cell in saltwater?

• It shrinks

• It bursts

• It remains the same

• It expands

Why does water flow out of a cell in saltwater?

• Higher concentration of pure water inside the cell

• Higher concentration of salt inside the cell

• Equal concentration of water inside and outside

• No concentration difference