5.6. Acid/Base Balance - Urine Acidity Flashcards
1
Q
What is the minimum concentration of urine?
A
pH 4.5-5.0
2
Q
What is the maximum concentration of urine?
A
ph 8.0
3
Q
What is the net production of H+ ions per day? And what must happen to it?
A
50-100mmoles, which must be excreted for pH regulation
4
Q
Without a buffer in the urine, what pH would this produce for the 50-100mmoles of H+ ions needing excreted?
A
pH of 1 - which would sting
5
Q
What are the main buffers in urine?
A
- Dibasic phosphates
- Uric Acid
- Creatinine
6
Q
- What does the formation of the urinal buffers form?
2. What does this allow for?
A
- “Titratable Acidity”
2. The generation of new bicarbonate and excretion of H+ ions
7
Q
Where is the formation of the Titratable Acidity?
A
The distal tubule
8
Q
Why does Titratable Acidity occur?
A
because the un-reabsorbed dibasic phosphate becomes highly concentrated by the removal of filtrate volume
