B1.7 Osmosis

Question 1

What is a partially permeable membrane

Answer 1

A membrane that allows only certain substances through that lets water move across them

Question 2

How does osmosis differ from diffusion

Answer 2

In diffusion all particles move freely down concentration gradients.

In osmosis only water molecules move across a partially permeable membrane from a dilute solution to a concentrated solution.

Question 3

What is osmosis

Answer 3

Diffusion of water from a high concentration (dilute) of water to a low concentration (concentrated) across a partially permeable membrane. Requires no energy. It goes down a concentration gradient

Question 4

What happens if its hypotonic to the animal cell

Answer 4

Swell and burst because water moves into cell by osmosis. Water moves in. cytoplasm becomes more concentrated

Question 5

Concentrated def

Answer 5

a solution which is less dilute, it contains a higher concentration of solute and a lower concentration of solvent