Question

Which among the following statements are correct regarding human excretion?

• A. Urine is stored in the ureters until there is the urge to pass it out.
• B. Bowman's capsule performs the first step in the filtration process.
• C. Neuron removes the nitrogenous wastes from the body.
• D. Re-absorption of the initial filtrate occur in the tubular region.

Answer 1

Answer: (B), (D)

The correct options are
B Bowman's capsule performs the first step in the filtration process.
D Re-absorption of the initial filtrate occur in the tubular region.

$\bullet$ 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.

$\bullet$ Bowman's capsule is a cup-like sack at the beginning of the tubular component of a nephron that performs the first step in the filtration of blood forming the initial fitrate.

$\bullet$ Neuron is the basic functional unit of nervous system, while nephron is a unit of the excretory system that helps in removal of nitrogenous waste from the blood. Each kidney contains more than a million tiny filtering nephrons that help in cleaning blood.

$\bullet$ During urine formation, blood is filtered in the Bowman's capsule. The filtrate enters the tubular part of nephron where most of the substances like salts, glucose, water, etc., are reabsorbed.