Question

The correct path of transport of urine is ..............

• A. major calyx $\rightarrow$ minor calyx $\rightarrow$ collecting duct $\rightarrow$ renal pelvis
• B. renal pelvis $\rightarrow$ minor calyx $\rightarrow$ major calyx $\rightarrow$ collecting duct
• C. collecting duct $\rightarrow$ major calyx $\rightarrow$ minor calyx $\rightarrow$ renal pelvis
• D. collecting duct $\rightarrow$ minor calyx $\rightarrow$ major calyx $\rightarrow$ renal pelvis

Hint:

The correct path of urine flow in the kidneys follows: collecting duct $\rightarrow$ minor calyx $\rightarrow$ major calyx $\rightarrow$ renal pelvis.

Answer 1

The Correct Option is D

Step 1: Understanding the path of urine transport.
Urine is formed in the kidneys and passes through a series of structures to be excreted. The correct order of transport is from the collecting duct, through the minor and major calyces, and finally into the renal pelvis before being transported to the bladder.
Step 2: Analyzing the options.
(A) major calyx $\rightarrow$ minor calyx $\rightarrow$ collecting duct $\rightarrow$ renal pelvis: This is incorrect as the transport begins in the collecting duct, not the calyces.
(B) renal pelvis $\rightarrow$ minor calyx $\rightarrow$ major calyx $\rightarrow$ collecting duct: Incorrect — The collecting duct is where urine is initially formed.
(C) collecting duct $\rightarrow$ major calyx $\rightarrow$ minor calyx $\rightarrow$ renal pelvis: Incorrect order of calyces.
(D) collecting duct $\rightarrow$ minor calyx $\rightarrow$ major calyx $\rightarrow$ renal pelvis: Correct — This is the correct order of transport for urine.
Step 3: Conclusion.
The correct answer is (D) collecting duct $\rightarrow$ minor calyx $\rightarrow$ major calyx $\rightarrow$ renal pelvis.