Osmosis

Question 1

What is diffusion?

Answer 1

movement of solute across a membrane when theres a membran concentration gradient (High to low)

Question 2

What is osmosis?

Answer 2

Movement of the solvent due to pressure gradient

Question 3

What ion concentrations are higher in the ECF? IFC?

Answer 3

Na, Cl, Ca, Bicarb higher ECF

K higher ICF

Question 4

Osmolarity is g x [C]… what happens when g= 1, g>1?

Answer 4

When g=1, the solute doesnt dissociate

when g>1 solute dissociates

Question 5

What is isosmotic, hyposmotic, and hyperosmotic?

Answer 5

Iso: [Solute] same in both
Hypo: [A] less than [B]
Hyper: [B] greater than [A]

Question 6

How can osmotic pressure be measured using a U tube?

Answer 6

difference in height can be measured to get osmotic pressure

Question 7

What is reflection coefficient?

Answer 7

a measure of permeability

Question 8

What does it mean when reflection coefficient is 0? 1?

Answer 8

0: solute completely permeable = no osmosis
1: solute impermeable = osmosis must occur

Question 9

Whats the normal range for osmotic pressure? for saline?

Answer 9

270 - (290*) - 300mOsm

Saline is 0.9%

Question 10

What is the equation to estimate ones osmolality?

Answer 10

Osmolality = 2[Na] + [glucose]/18 + [BUN]/2.8

Question 11

What happens when a solution is hyposmotic to the cell?

Answer 11

cell will swell

Question 12

What happens when a solution is hyperosmostic (more concentrated) to the cell>?

Answer 12

cell will shink, forming crenate

Question 13

What is tonicity?

Answer 13

how the cell responds when being put into a solution

Question 14

Isotonic

Answer 14

cell didnt change volume

Question 15

hypotonic

Answer 15

cell swelled or lysed due to swelling as water moved in

Question 16

hypertonic

Answer 16

water moved out of cell and cell shrank/crenated