Fluid Balance

Question 1

Third spacing

Answer 1

accumulation of fluid in a space where there is usually NO fluid. Occurs when there is excess fluid in blood vessels and it moves into the interstitial or “third” space

Question 2

Ascites

Answer 2

“third-spacing” b/c it is the fluid build up of peritoneum, where there is usually no fluid

Question 3

Interstitial edema

Answer 3

not third spacing b/c interstitial space always has fluid, but now there is too much

Question 4

Total body water (TBW)

Answer 4

0.6x body weight

Question 5

Extracellular fluid (ECF)

Answer 5

1/3 TBW

Question 6

Intracellular fluid (ICF)

Answer 6

2/3 TBW

Question 7

Plasma

Answer 7

1/4 ECF

Question 8

Interstitial fluid

Answer 8

3/4 ECF

Question 9

Osmosis

Answer 9

Net diffusion of water across a membrane from a region of high water concentration to one that has a lower water concentration

Question 10

Osmolarity

Answer 10

amount of solute particles in a solution. Defines concentrations of ions in the kidney.
1 mole of solute in 1 liter of solution = 1 osm/L. BUT if a molecule dissolves into 2 ions (like NaCl) a solution with 1 mol/L has an osmolar concentration of 2 osm/L