Question

Arrange the following in the correct sequence:
1. Urine enters the ureter.
2. Urine is stored in the urinary bladder.
3. Some substances in the initial filtrate are selectively reabsorbed.

• 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 reabsorbed 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.