CAIE A Level Biology 9700 · Transport in mammals
A person becomes dehydrated after prolonged exercise without drinking water. Describe the effects of dehydration on the composition of blood and the formation and composition of tissue fluid. In your answer, refer to the roles of the heart, blood vessels, and the properties of water.
6 marks, so the mark scheme is looking for about 6 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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