Question
Question: Human urine is invariably acidic because...
Human urine is invariably acidic because
A
The blood entering the kidney is acidic
B
Kidneys selectively filter out the acidic substances of blood into urine
C
Kidneys secrete acids to keep urine acidic
D
Urine is made acidic in urinary bladder
Answer
Kidneys secrete acids to keep urine acidic