Glomerulus: The Filtering Unit of the Nephron

What is the main function of the glomerulus in the nephron?

A. Filtration of blood

B. Reabsorption of glucose

C. Water reabsorption (counter-current multiplier)

D. Water reabsorption (stimulated by ADH)

Answer:

A. Filtration of blood

The glomerulus plays a critical role in the nephron by filtering blood to create urine. It is responsible for the initial filtration process where waste products and excess substances are removed from the blood to form a filtrate that will eventually become urine.

The glomerulus is a network of capillaries that allows for the passive filtration of blood based on size and charge of molecules. This process is essential for maintaining the body's internal environment and getting rid of toxins.

With the help of the Bowman's capsule, the glomerulus ensures that only the necessary nutrients and substances are reabsorbed back into the bloodstream, while the rest are excreted as waste. This intricate filtration system is crucial for maintaining overall health and well-being.