5.3 Hormonal coordination in humans

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Question 15
Medium

The table below shows the daily water gain and loss for an individual under normal, resting conditions. Under these conditions, the volume of water taken in by the body is equal to the volume of water lost from the body.

Method of water gainVolume (cm3\text{cm}^3cm3)Method of water lossVolume (cm3\text{cm}^3cm3)
Food450Urine1400
Drink1600Skin550
Metabolism350Breathing320
Faecesxxx
a.

Calculate the volume of water, xxx, lost in faeces in one day. Show your working.

[3]
b.

Which metabolic process produces water?

  • Breakdown of protein to amino acids
  • Changing glycogen into glucose
  • Digestion of fat
  • Respiration of glucose
[1]
c.

Explain why more water is lost through the skin when the person exercises (such as running a race).

[3]

5.3 Hormonal coordination in humans Questions

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