Membrane Structure and Function

If a cell containing 5% salt is placed into a glass of water with 20% salt, the water is _______ compared to the cell.

• hypertonic
• hypotonic
• isotonic

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

• stay the same
• shrink-get smaller
• swell-get bigger

What happens if someone gives you a 90% salt saline drip?

• your cells will shrivel and you will die
• your cells will swell and you will die
• you should be fine

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck

What type of solution is displayed below?

• hypertonic
• hypotonic
• isotonic

What kind of solution is displayed below?

• hypertonic
• hypotonic
• isotonic

Why type of solution is displayed below?

• hypertonic
• hypotonic
• isotonic

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

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.

Ideally, your cells should be in a(n) _____ solution.

• hypertonic
• hypotonic
• isotonic