In the context of the nephron, what is the filtration unit of the kidney?

• A. Loop of Henle
• B. Renal corpuscle (glomerulus and Bowman's capsule)
• C. Collecting duct
• D. Renal pelvis

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the structure of the nephron, which is the functional unit of the kidney responsible for filtering blood and forming urine.
2. Step 2: Identify the components of the nephron, including the renal corpuscle, proximal tubule, loop of Henle, distal tubule, and collecting duct.
3. Step 3: Recognize that the filtration unit specifically refers to the part where blood plasma is filtered to form the initial filtrate.
4. Step 4: Know that the renal corpuscle consists of the glomerulus (a network of capillaries) and Bowman's capsule (a surrounding cup-like sac), and this is where filtration occurs.
5. Step 5: Conclude that the renal corpuscle is the filtration unit of the kidney, as it filters blood plasma into the nephron tubule system.