Osmotic Pressure

Question 1

Average osmolarity of ICF and ECF in human body.

Answer 1

290 mOsm, can range from 270 - 300 mOsm

Question 2

What is Normal saline?

Answer 2

0.9% of sodium chloride which is isosmotic to red blood cells?

Question 3

You need to memorize the estimated osmalility equation.

What is it?

Answer 3

Estimated Osmolality = (2x [Na]) + ([glucose]/18) + ([BUN}/2.8)

BUN = Blood urea nitrogen

Question 4

Fancy term for shrinking of RBC due to hyperosmotic gradient.

Answer 4

Crenation

Question 5

What cells do not function well in osmalarity changes?

Answer 5

Neurons, some thirst ones respond better, and overall many cells in the body will not respond well.

Question 6

Reflection Coefficient closer to 1?

Closer to 0?

Answer 6

1 = Tonocity and Osmolarity match

0 = Will not match , solute in question does not provide osmotic pressure

Question 7

Hypotonic solutions cause what to happen to a cell?

Hypertonic?

Answer 7

Hypotonic - water moves in

Hypertonic- water movesout