Which of the following structures is responsible for filtering blood within the renal corpuscle?

• A. Glomerulus
• B. Collecting duct
• C. Proximal convoluted tubule
• D. Loop of Henle

Answer: (A)

Verified step by step guidance

1. Understand the anatomy of the nephron: The nephron is the functional unit of the kidney, responsible for filtering blood and forming urine. It consists of several structures, including the renal corpuscle, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.
2. Focus on the renal corpuscle: The renal corpuscle is the initial part of the nephron where blood filtration occurs. It is composed of two main structures: the glomerulus and Bowman's capsule.
3. Identify the role of the glomerulus: The glomerulus is a network of capillaries within the renal corpuscle. It is responsible for filtering blood by allowing water, ions, and small molecules to pass through its walls while retaining larger molecules like proteins and blood cells.
4. Differentiate the other options: The collecting duct is involved in the final concentration of urine, the proximal convoluted tubule reabsorbs nutrients and water, and the loop of Henle is responsible for creating a concentration gradient in the medulla. None of these structures are directly involved in blood filtration within the renal corpuscle.
5. Conclude that the glomerulus is the correct answer: Based on its function and location within the renal corpuscle, the glomerulus is the structure responsible for filtering blood.