5.2 The human nervous system

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Question 4
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The control of body temperature is critical for survival, especially for individuals working in extreme thermal environments. An industrial glassblower working near a furnace monitored their thermoregulation, fluid loss, and metabolic energy balance.

a.

On one shift, the worker lost 5400 cm35400\text{ cm}^35400 cm3 of water as sweat. The evaporation of 1 cm31\text{ cm}^31 cm3 of sweat requires 2.45 kJ2.45\text{ kJ}2.45 kJ of thermal energy to be transferred from the body.

Calculate the total energy transferred from the worker's body through the evaporation of sweat during this shift.

[2]
b.

On a different day under hotter conditions, the worker's body transferred 8225 kJ8225\text{ kJ}8225 kJ of energy via sweat evaporation to maintain a stable core body temperature. Their total daily dietary energy intake on that day was 23500 kJ23500\text{ kJ}23500 kJ.

Calculate the percentage of the worker's daily energy intake that was utilized for the evaporation of sweat.

[2]

5.2 The human nervous system Questions

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