In the context of the nephron, the functional unit of the kidney is a(n):

• A. Glomerulus
• B. Renal pyramid
• C. Nephron
• D. Ureter

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the question is asking about the functional unit of the kidney, which is the smallest structure capable of performing the kidney's essential functions.
2. Step 2: Recall that the nephron is the microscopic structural and functional unit of the kidney responsible for filtering blood and forming urine.
3. Step 3: Recognize that the glomerulus is a part of the nephron, specifically the network of capillaries where filtration begins, but it is not the entire functional unit.
4. Step 4: Note that the renal pyramid is a larger anatomical structure in the kidney composed of many nephrons and collecting ducts, not a single functional unit.
5. Step 5: Understand that the ureter is a duct that carries urine from the kidney to the bladder and is not involved in the filtration or urine formation process.