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Multiple Choice
In the urinary system, what structures merge to form a papillary duct?
A
Proximal convoluted tubules
B
Distal convoluted tubules
C
Collecting ducts
D
Loop of Henle
Verified step by step guidance
1
Begin by understanding the structure of the nephron, which is the functional unit of the kidney. The nephron consists of several parts: the proximal convoluted tubule, the loop of Henle, the distal convoluted tubule, and the collecting duct.
Recognize that the collecting duct is the structure that receives urine from multiple nephrons. It is the final segment in the nephron where urine is concentrated before it is transported to the renal pelvis.
Identify that the collecting ducts converge to form larger ducts known as papillary ducts. These papillary ducts are located at the tip of the renal pyramids in the medulla of the kidney.
Understand that the papillary ducts open into the minor calyces of the kidney, which then lead to the major calyces and ultimately to the renal pelvis, where urine is collected before being transported to the bladder.
Conclude that the collecting ducts are the structures that merge to form the papillary ducts, as they are the final pathway for urine from the nephrons before it enters the renal pelvis.