Waec Model Questions Vol1 2019 Biology Question 7

A 25‑year‑old male athlete is training for a marathon. During a long run in hot weather (35 °C) his core temperature rises and he begins to sweat heavily. The data recorded at three time points are shown below. | Time (min) | Core temperature (°C) | Sweat rate (ml min⁻¹) | Plasma osmolarity (mOsm kg⁻¹) | |------------|-----------------------|----------------------|-------------------------------| | 0 | 37.0 | 0.0 | 285 | | 30 | 38.5 | 0.8 | 295 | | 60 | 38.0 | 1.2 | 300 | Using this information, answer the following questions.