Question

Which of the following is the correct pathway for passage of urine in humans?

• A. Collecting tubule $\to$ Ureter $\to$ Bladder $\to$ Urethra
• B. Renal vein $\to$ Renal ureter $\to$ Bladder $\to$ Urethra
• C. Pelvis $\to$ Medulla $\to$ Bladder $\to$ Urethra
• D. Cortex $\to$ Medulla $\to$ Bladder $\to$ Urethra

Answer 1

Answer: (A)

Collecting tubule $\to$ Ureter $\to$ Bladder $\to$ Urethra

The collecting tubules are responsible for connecting the Distal Proximal Tubule of the nephrons to the calyces of the kidney. The calyces then join to form renal pelvis that leads to the ureter. The ureter connects the kidney to the bladder. Bladder is storage organ for urine, that will contract when filled with the urine. The contraction of the muscles of the bladder will open the external and the internal sphincters and the urine will pass out through the urethra.

Hence, the correct answer is 'Collecting tubule-Ureter-Bladder-Urethra'