Diffusion (must know)

Question 1

Who is the father of diffusion?

Answer 1

Fick (ficks law)

Question 2

According to Fick’s Law diffusion rate of gas is directly proportional to??

Answer 2

• Partial pressure gradiant
• Membrane area
• Solubility of gas in membrane

Question 3

According to Ficks law diffusion rates of gas are inversly proportional to ??

Answer 3

• membrane thickness

- square root of molecular wt

Question 4

Ficks Equation? and why is it important?

Answer 4

things in the numerator are directly proportional to diffusion
things in the denominator are inversly proportionate to diffusion

Question 5

Factors determining diffusion rate across membranes for non-gasses

Answer 5

• concentration gradients
• electrochemical gradients for (ions)
• lipid solubility
• Size of molecules

Question 6

what increases molecular movement or diffusion

Answer 6

Heat

Question 7

the main determinant of a gasses diffusion when all others factors are equal is what?

Answer 7

concentration gradient

Question 8

C02 and N20 are approximately 20xs more diffusional than what??

Answer 8

02

Question 9

Osmosis is movement of what?

Answer 9

H20 not substance

Question 10

Who’s Law explains why diffusion occurs?

Answer 10

Ficks

Question 11

when talking about oncotic you should think of what?

Answer 11

proteins and colloids

Question 12

if osmality is decreases what increases

Answer 12

H20

Question 13

what 3 parts of Ficks law increases diffusion

Answer 13

partial pressure gradiant
membrane area
solubility if gas (in membrane)

Question 14

what 2 parts of ficks law decreases diffusion?

Answer 14

membrane thickness

square root of molecular wt

Question 15

5 parts of ficks law of diffusion

Answer 15

numerator (directly proportionate)
-partial pressure gradiant
-membrane area
-solubility if gas (in membrane)
Demoninator (inversly proportionate)
membrane thickness
square root of molecular wt