In renal physiology, blood plasma is filtered in which structure of the nephron?

• A. Peritubular capillaries
• B. Glomerulus (within the renal corpuscle)
• C. Collecting duct
• D. Proximal convoluted tubule

Answer: (B)

Verified step by step guidance

1. Understand the basic structure of the nephron, which includes the renal corpuscle and the renal tubule. The renal corpuscle consists of the glomerulus and Bowman's capsule.
2. Recognize that blood plasma filtration occurs at the very beginning of the nephron, where blood enters the glomerulus, a network of capillaries.
3. Recall that the glomerulus filters blood plasma by allowing water and small solutes to pass into Bowman's capsule, while larger molecules and blood cells remain in the bloodstream.
4. Differentiate the glomerulus from other nephron structures such as the peritubular capillaries (which surround the tubules and are involved in reabsorption and secretion), the proximal convoluted tubule (where reabsorption occurs), and the collecting duct (which collects urine from multiple nephrons).
5. Conclude that the structure responsible for filtering blood plasma in the nephron is the glomerulus, located within the renal corpuscle.