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WAEC Biology 1995 Question 60

Question 60

Excretion

Ultra-filtration process at the Bowman's capsule is facilitated by

  1. A.the volume of water in the blood
  2. B.the high concentration of urea in the blood of the Bowman's capsule
  3. C.the differential blood pressure between the glomerulus and the Bowman's capsule
  4. D.the differential blood volume between the glomerulus and the Bowman's capsule
  5. E.heavy weight of the urea, water, glucose and amino acids in the Bowman's capsule
Show the answer and explanation

Answer: C (the differential blood pressure between the glomerulus and the Bowman's capsule)

Explanation

The afferent arteriole is wider than the efferent one, so blood pressure in the glomerulus is high and forces fluid into the capsule.