Which statement about renal columns is true?

Which statement about renal columns is true?

• A. Ureters are the site of filtration
• B. Bowman’s capsule is the site of secretion
• C. Renal columns are tissue of the cortex located between pyramids for support
• D. Filtration occurs in the collecting ducts

Answer: (C)

Renal columns are cortical tissue that extend inward between the renal pyramids, providing structural support and housing vessels as the kidney's architecture is organized. This location—between the medullary pyramids and within the cortex—is why columns are described as cortical tissue that separate the pyramids. Filtration, the process of separating plasma into filtrate, occurs in the glomerulus within the renal corpuscle in the cortex, not in the ureters. Bowman's capsule is part of that filtration site, so it’s not the site of secretion. Secretion happens later along the renal tubules, and filtration does not occur in the collecting ducts.

Renal columns are cortical tissue that extend inward between the renal pyramids, providing structural support and housing vessels as the kidney's architecture is organized. This location—between the medullary pyramids and within the cortex—is why columns are described as cortical tissue that separate the pyramids. Filtration, the process of separating plasma into filtrate, occurs in the glomerulus within the renal corpuscle in the cortex, not in the ureters. Bowman's capsule is part of that filtration site, so it’s not the site of secretion. Secretion happens later along the renal tubules, and filtration does not occur in the collecting ducts.