What is the process by which the kidneys filter blood to form urine?
A
Ultrafiltration
B
Secretion
C
Reabsorption
D
Digestion
Correct Answer: Option A — Ultrafiltration
Explanation:
Ultrafiltration is the first process in urine formation where high pressure in the glomerulus forces water glucose salts and urea out of the blood into the Bowman's capsule.