What forms a major calyx?

What forms a major calyx?

• A. one minor calyx
• B. two or more renal papillae
• C. two or more minor calyces
• D. the renal pelvis

Answer: (C)

A major calyx forms when two or more minor calyces merge. Each minor calyx collects urine from a single renal papilla, and several minor calyces drain into one major calyx. Then the renal pelvis is formed by the union of the major calyces, not by a single major calyx. So the key idea is that a major calyx arises from the convergence of multiple minor calyces.

A major calyx forms when two or more minor calyces merge. Each minor calyx collects urine from a single renal papilla, and several minor calyces drain into one major calyx. Then the renal pelvis is formed by the union of the major calyces, not by a single major calyx. So the key idea is that a major calyx arises from the convergence of multiple minor calyces.