Cell Volume Regulation

Question 1

Capillaries are impermeable to _____.

Answer 1

protein

Question 2

What is deltaC in the Van’t Hoff equation?

Answer 2

difference in solute concentration across the membrane

Question 3

NaCl crosses capillaries more easily than ____ does.

Answer 3

glucose

Question 4

What is R in the Van’t Hoff equation?

Answer 4

the gas constant

Question 5

Plasma contains more _____ than interstitial fluid does.

Answer 5

proteins

Question 5

THO

Answer 5

water and tritiated water

Question 7

tonicity

Answer 7

a measure of the osmotic pressure gradient of 2 solutions separated by a semipermeable membrane

Question 8

What is the main protein in the blood and what it its concentration?

Answer 8

mostly albumin; 1 mM

Question 9

What is sigma in the Van’t Hoff equation?

Answer 9

the reflection coefficient

Question 10

What is the volume of the ECF?

Answer 10

14L exchangeable, 5L inexchangeable

Question 11

What is T in the Van’t Hoff equation?

Answer 11

temp

Question 11

What is the total body fluid volume?

Answer 11

42 liters

Question 12

____ crosses capillaries more easily than glucose does.

Answer 12

NaCl

Question 13

the reflection coefficient

Answer 13

a measure of how well the membrane ‘reflects’ the solute

Question 14

What is one case where the osmotic gradient is not balanced osmotically?

Answer 14

proteins in the circulating blood

Question 15

______ are impermeable to protein.

Answer 15

Capillaries

Question 17

What is the range of values for the reflection coefficient?

Answer 17

range from 0 (THO) to 1 (nonpermeating solute)

Question 18

_____ contains more protein than ______ does.

Answer 18

interstitial fluid

Question 19

Van’t Hoff equation

Answer 19

pi = sigma RT delta C

Question 20

pi = sigma RT delta C

Answer 20

Van’t Hoff equation

Question 21

What is the volume of the ICF?

Answer 21

23L