Osmolarity & pH Flashcards
1
Q
What is the difference between osmolarity and osmolality?
A
-
2
Q
Why does necrosis cause cells to swell and burst?
A
A failure in the Na/K ATPase pump - Na is not pumped out of the cell adequately, and so collects in the cell - this causes water to be drawn into the cell, eventually causing it to burst
3
Q
What is normal plasma osmolality?
A
290 mOsmol/kg
4
Q
What is the formula for calculating pH?
A
pH = -log[H+]
5
Q
What type of scale is the pH scale?
A
Logarithmic
6
Q
What is normal plasma pH?
A
7.36-7.44
7
Q
What does abnormal plasma pH normally originate from?
A
A major organ dysfunction (commonly the lungs, kidney, or liver)
8
Q
What is the pH of pure water?
A
7.0
9
Q
What is gastric pH?
A
1.5-3.5
10
Q
What are the average plasma (extracellular) levels of Na and K?
A
Na - 140
K - 5
