May/June 2026 Paper 22

2026 · 40 questions · 40 parts · 40 marks

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23Blood Glucose RegulationMedium1 mark
The graph shows the blood glucose concentration of a student during one day.
Graph of blood glucose concentration / mg per dm³ (0 to 160) against time of day from 06:00 to 22:00: mostly between 80 and 90, with sharp peaks of about 110 just before 08:00, about 126 just after 12:00 and about 132 just after 18:00, and its lowest dip, to about 72, at around 15:00
At which time of day would the concentration of glucagon in the blood be at its highest?