Function of Glomerulus in urine formation is Tubular reabsorption Tubular secretion Both (1) & (2)Ultra filtration

The function of the glomerulus in urine formation involves several processes, including tubular reabsorption, tubular secretion, and ultrafiltration. Let's break down each step:

1. Ultrafiltration: The glomerulus acts as a filter, allowing small molecules such as water, electrolytes, and waste products to pass through while retaining larger molecules like proteins and blood cells. This process is known as ultrafiltration.

2. Tubular reabsorption: After the ultrafiltration process, the filtrate enters the renal tubules. During tubular reabsorption, essential substances such as glucose, amino acids, and water are reabsorbed back into the bloodstream. This helps maintain the body's balance of fluids and electrolytes.

3. Tubular secretion: In addition to reabsorption, the renal tubules also participate in tubular secretion. This process involves the active transport of certain substances, such as hydrogen ions and drugs, from the bloodstream into the tubules. Tubular secretion helps eliminate waste products and maintain the body's acid-base balance.

Therefore, the function of the glomerulus in urine formation includes both tubular reabsorption and tubular secretion, making the correct answer option (3) "Both (1) & (2) - Tubular reabsorption and Tubular secretion." Additionally, the initial step of ultrafiltration is also a crucial part of the glomerulus' function in urine formation.