Question

How does ultrafiltration and reabsorption occur in nephrons?

Answer 1

Dear Student,

● Physiology of urine formation -

Urine formation involves following steps -

1. Glomerular filtration
2. Tubular reabsorption
3. Tubular secretion

# Ultrafiltration -

• Blood is passed from efferent arteriole to afferent arteriole in glomerulus.
• Due to high hydrostatic pressure, small molcules are filtrated through semipermeable capillary walls.
• It creates the plasma-like filtrate of blood in the glomerulus.

# Tubular reabsorption -

• During this stage, most of the water and required nutrients are reabsorbed back.
• Essential filtered substances are reabsorbed from tubular lumen to peritubular capallaries.
• It eturns useful solutes from filtrate to blood.

Hope this helps you...

Answer 2

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- Physiology of urine formation -

Urine formation involves following steps -

• Glomerular filtration
• Tubular reabsorption
• Tubular secretion

# Ultrafiltration -

Blood is passed from efferent arteriole to afferent arteriole in glomerulus.

Due to high hydrostatic pressure, small molcules are filtrated through semipermeable capillary walls.

It creates the plasma-like filtrate of blood in the glomerulus.

# Tubular reabsorption -

During this stage, most of the water and required nutrients are reabsorbed back.

Essential filtered substances are reabsorbed from tubular lumen to peritubular capallaries.

It eturns useful solutes from filtrate to blood.