Question

The structural and functional units of excretion in the human kidney is the ______.

Options

• Ureter

• Bowman’s capsule

• Renal pelvis

• Nephron

Answer 1

The structural and functional units of excretion in the human kidney is the nephron.

Explanation:

The nephron is the microscopic structural and functional unit of the human kidney, with roughly one million of them tightly packed inside each organ. It is directly responsible for cleaning the blood by removing toxic nitrogenous metabolic wastes (like urea) while maintaining proper fluid and electrolyte balance. It achieves this complex excretory function through three coordinated biological processes: ultrafiltration, selective tubular reabsorption, and active secretion.