Final answer:
True, the human body is comfortable when there's a balance between heat produced internally and heat lost to the environment, as part of thermoregulation to maintain a stable temperature.
Step-by-step explanation:
The statement that the human body is comfortable when the heat produced in the body is equal to the heat lost to the surroundings is True. This balance is part of the body's thermoregulation process, through which it maintains a stable internal temperature despite external temperature changes. The average core temperature is maintained at around 36.5-37.5 °C (97.7-99.5 °F). Approximately 60 percent of the energy from ATP production is converted into heat for maintaining body temperature. When there is excessive heat due to physical activity or hot conditions, the body responds with mechanisms like sweating to expel excess heat, but this can be less efficient in humid environments.