Q2 / 157 · NTA Abhyas (NEET) 2020 · Zoology · Excretory Products and their Elimination

Effective filtration pressure in glomerulus is maintained due to

  • A
    powerful pumping action of the heart.
  • B
    secretion of adrenaline.
  • Correct answer
    C
    afferent arteriole being slightly larger than efferent arteriole.
  • D
    vacuum develops in collecting duct and sucks the blood.

Solution

The glomerulus is a capillary network within the Bowman's capsules. Blood enters glomerular capillaries through afferent arterioles and leaves through efferent arterioles. The diameter of the afferent arteriole is much more than that of efferent arteriole. This increases the volume of blood in the glomerulus and increases the filtration rate.

Hence, the correct answer is option: 'C'.

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