An investigation was carried out to study the effect of consuming a warm nutrient broth on a participant's core body temperature and sweating rate.
The methodology was as follows:
- The participant rested in a room maintained at a constant ambient temperature of 18∘C18^\circ\text{C}18∘C.
- The core body temperature was measured continuously near the brain.
- The rate of sweating was monitored at the skin surface.
- At 10 minutes10\text{ minutes}10 minutes, the participant drank 500 cm3500\text{ cm}^3500 cm3 of warm nutrient broth.
- Measurements of core body temperature and sweating rate were recorded for a total duration of 50 minutes50\text{ minutes}50 minutes.
Figure A and Figure B display the experimental results.
a.[1]
What was the participant's normal core body temperature before consuming the warm broth?
b.[2]
Explain why the core body temperature increased shortly after consuming the warm broth.
c.[3]
Explain how the change in sweating rate between 10 minutes10\text{ minutes}10 minutes and 22 minutes22\text{ minutes}22 minutes helps to restore the participant's normal core body temperature.