Question

Name a nitrogenous excretory product present in human urine.

Hint:

Organisms are classified based on their main nitrogenous waste: Ureotelic (excrete Urea, e.g., humans), Ammonotelic (excrete Ammonia, e.g., fish), Uricotelic (excrete Uric acid, e.g., birds).

Answer 1

Step 1: Understanding the Concept:
The breakdown of proteins and amino acids generates nitrogen-containing waste.

Step 2: Detailed Explanation:
Different animals excrete nitrogenous waste in different forms (ammonia, urea, or uric acid) depending on their environment and water availability.
Humans and other mammals primarily excrete urea, which is formed in the liver through the ornithine cycle and is less toxic than ammonia, allowing it to be safely transported in the blood to the kidneys for excretion.

Step 3: Final Answer:
The primary nitrogenous waste in human urine is Urea.