Question

Arrange the following in the correct sequence:
1. Urine enters the ureter.
2. Urine is stored in the urinary bladder.
3. Selective reabsorption of some substances in the initial filtrate as the urine flows along the tube.

• A. 1→ 2 → 3
• B. 2 → 3 → 1
• C. 3 → 1 → 2
• D. 3 → 2 → 1

Answer 1

The correct option is C

3 → 1 → 2

Each kidney has a large number of filtration units called nephrons, packed close together.

-Some substances in the initial filtrate are selectively re-absorbed as the urine flows along the tubular part of the nephron.

-The urine formed in each kidney eventually enters a collecting tube, the ureter, which connects the kidney to the urinary bladder.

-Urine is stored in the urinary bladder until the pressure in the expanded bladder leads to the urge to pass it out through the urethra.