Describe5 marksStandard
Describe the sequence of events that occurs when the water potential of the blood falls below normal, including the role of ADH and its effect on the kidney.
CAIE A Level Biology 9700 · Homeostasis
Homeostasis: describe question
How this question is marked
5 marks, so the mark scheme is looking for about 5 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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