Week 6: Fluid Compartments Flashcards
1
Q
The concentration of water in plasma is about ___ compared ___, the total [solutes]
A
55,500 mM, 300 mM. Plasma is essentially just water.
2
Q
Albumin is an anion with __ net negative charges
A
17
3
Q
How is the anion gap calculated? What is a normal value?
A
mM of biggest cation minus main anions: AG = (Na+) - (Cl-) - (HCO3-). Usually 10-14.
4
Q
How is it that capillaries don’t leak much despite having large holes?
A
Albumin ups the oncotic pressure that pulls water back into the plasma.
5
Q
Most prominent plasma solutes
A
Na (140), Cl (103), HCO3 (27), Urea (6), Weak OA (6), Glucose (5), K+ & Ca (4), Mg, H2PO4, alb (1)
6
Q
Measuring CO2 gives an estimate of ___. Why?
A
HCO3-. Add H+ to bicarb and you get CO2 and water
