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3 marksExcretion and Osmoregulation

CSEC Biology · May/June 2009 · Paper 2 · Question 4(b)

Members of a Boy Scouts troop were advised by their leader to take water with them on their hike into the mountains. One boy decided to drink a large quantity of water before leaving on the hike.

Explain how his body functions to deal with the excess water.

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Other parts of this question

  1. 4(a)(i)With the aid of a fully annotated diagram of the kidney (uriniferous) tubule, explain how urine is produced and gets to the bladder.[8 marks]
  2. 4(a)(ii)Suggest why urine production is important in humans.[8 marks]
  3. 4(c)Suggest TWO reasons why the plants observed growing along the trail had mechanisms to reduce water loss.[4 marks]

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