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The diagram below illustrates the variation in atmospheric temperature in the course of a day and the body temperature of two animals A and B. Study it and answer the questions that follow.

  1. Describe how animal A regulates its body temperature between 12 noon and 6.00 pm.
  2. State the activities that account for the body temperature of animal B between 9.00 am and 6.00 pm.

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    • Erector pilli muscles contract lowering hair on the skin less air is trapped increasing heat loss;
    • Dilation of superficial arteries increasing blood flow near the surface of the skin leading to increase in heat loss;
    • More sweating leading to evaporation of sweat from skin leads to heat loss;
  2. Going under a shade/burrowing;
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