Fluid Compartments And Solutes

Question 1

What is osmosis?

Answer 1

Movement of water down its own concentration gradient

Towards area of higher osmolarity

Question 2

What is osmolarity?

Answer 2

Measure of the concentration of all solute particles in a solution

Question 3

What is diffusion?

Answer 3

Spontaneous movement of a solute done a concentration gradient

Question 4

What is a hypertonic solution?

Answer 4

Osmolarity of inpermeant solutes outside > inside

—> cell shrinks

Question 5

What is a hypotonic solution?

Answer 5

Osmolarity of inpermeant solutes outside < inside

—> cell swells

Question 6

What is an isotonic solution?

Answer 6

Osmolarity of inpermeant solutes outside = inside

—> cell volume is unchanged

Question 7

Why don’t cells burst?

Answer 7

Na+K+ATPase pump

—> maintains Na+ conc. in cell —> no net movement of Na+ across the membrane

Question 8

What is the University of Wisconsin (UW) solution for?

Answer 8

Cold storage solution for organ preservation

Question 9

What 3 main factors serve to reduce cell swelling in UW-infused tissue?

Answer 9

Lack of Na+ or Cl-

Presence of extracellular impermeant solutes

Presence of a macromolecular colloidb (starch)

Question 10

What is colloid osmotic pressure?

Answer 10

Pressure due to higher concentrations of plasma proteins inside the capillary than outside

Question 11

What is hydrostatic pressure?

Answer 11

Pressure inside vessel due to the blood slow through the tissue

Question 12

What is the relation between COP and Hydrostatic pressure in a normal capillary?

Answer 12

Hydrostatic pressure ~ COP