Membrane Diffusion & Gradients

Question 1

What is diffusion?

Answer 1

Spontaneous movement of particles from an area of high concentration to an area of low concentration

Main goal is to reach equilibrium.

DOES NOT REQUIRE ENERGY!!!

Question 2

What contains High permeability?

Answer 2

small nonpolar molecules, and small uncharged nonpolar molecules

Question 3

What contains Low permeability?

Answer 3

large uncharged polar molecules and ions

Question 4

What happens if there is greater lipid solubility of the diffusing particle?

Answer 4

The more permeable the membrane will be

Question 5

What are Solvents?

Answer 5

liquid medium in which particles may be dissolved

Question 6

What are Solutes?

Answer 6

dissolved particle

Question 7

What is Osmosis?

Answer 7

Water moves from solution with lower
concentration of osmotically active solutes to
solution with higher concentration of
osmotically active solutes

1st. (i.e. the concentration of water is high) 2.(i.e. the

Question 8

What is a Hypertonic Solution?

Answer 8

Solute concentration of solution higher than cell

-More dissolved particles outside of cell than inside of cell

Question 9

What is a Hypotonic Solution?

Answer 9

Solute concentration of solution lower than cell

Less dissolved particles outside of cell than inside cell

Question 10

Is it true that animal cells will expand and may burst when osmosis produce physical force?

Answer 10

True

Question 11

Is it true that Organisms with a cell wall, such as plants, do not burst due to osmosis producing physical force?

Answer 11

True

Question 12

What is turgidity?

Answer 12

When the Cell membrane pushes against cell wall and the rigid cell wall resists due to its own structural integrity