Lecture 5 Flashcards
1
Q
Corrected osmolar activity (mOsm/L)
A
283
2
Q
Total osmotic pressure at 37C (mmHg)
A
300
3
Q
Quick estimate of corrected osmolarity
A
twice the Na+ plasma level
4
Q
A drop in pH will cause what to happen to intracellular enzymes?
A
They slow down
5
Q
What can increase the speed of Na+K+ ATPase pumps?
A
Insulin or beta agonist binding to receptor on cell
6
Q
What can decrease the speed of Na+K+ ATPase pumps?
A
Energy/oxygen deficiency, decreased pH, and Digoxin binding to receptor on cell
7
Q
A resting cell has what kind of membrane potential?
A
negative
8
Q
-mV (Vrm)
A
resting membrane potential
9
Q
Reasons for -Vrm:
A
1) Na+K+ ATPase
2) Proteins
3) Current
10
Q
Ohm’s law
A
V=IR
11
Q
Nernst (Equilibrium) potentiel
A
EMF(mV)= (+or-) 61 x log (concentration inside / concentration outside)
