IGCSE Biology Paper-3: Specimen Questions with Answers 349 - 350 of 358

Passage

Excretion is the process of removing waste products of metabolism from the body.

Question 349 (6 of 7 Based on Passage)

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Some people with kidney failure are given a kidney transplant.

State one advantage and one disadvantage of having a kidney transplant instead of dialysis treatment.

advantage …

disadvantage …

Explanation

Advantage of Kidney Transplant

  • No more dialysis treatments
  • More “normal” kidney function
  • Higher chance of living a longer life
  • Less restrictions on diet and fluids
  • More freedom

Disadvantage of Kidney Transplant

  • Requires major surgery with possible risks related to surgery
  • Must take anti-rejection medicines for rest of life or life of kidney
  • Higher risk for infection from these medicines
  • Risk of rejection with loss of kidney function/return to dialysis

Question 350 (7 of 7 Based on Passage)

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The liver is another excretory organ of the body. The liver breaks down hormones and drugs, such as alcohol.

(i) State one function of the liver other than the breakdown of hormones and drugs.

Explanation

  • Production of bile, which helps carry away waste and break down fats in the small intestine during digestion
  • Production of certain proteins for blood plasma
  • Conversion of excess glucose into glycogen for storage
  • Processing of hemoglobin for use of its iron content (the liver stores iron)
  • Regulating blood clotting