In the urinary system, the functional unit of the kidney is called a(n):

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

Answer: (B)

Verified step by step guidance

1. Understand that the question is asking for the functional unit of the kidney within the urinary system.
2. Recall that the kidney's main role is to filter blood and produce urine, and this function is carried out by a specific microscopic structure.
3. Identify the options: Renal pelvis, Nephron, Ureter, and Glomerulus, and consider their roles in the urinary system.
4. Know that the Renal pelvis is a funnel-shaped structure that collects urine, the Ureter transports urine to the bladder, and the Glomerulus is a part of the nephron involved in filtration.
5. Recognize that the Nephron is the complete functional unit responsible for filtering blood, reabsorbing needed substances, and forming urine, making it the correct answer.