Final answer:
Strenuous activity on a hot day can indeed cause the body to produce up to 5 liters of sweat to regulate temperature. This true statement reflects the body's need to dissipate excess heat, particularly during intense exercise or heat exposure.
Step-by-step explanation:
It is true that strenuous physical activity on a hot day can generate as much as 5 liters of sweat a day. Sweating is one of the body's primary mechanisms for regulating internal temperature. As sweat evaporates from the skin, it helps to cool the body down.
This process is particularly crucial during intense physical activity or exposure to high temperatures because the body produces excess heat that needs to be dissipated to prevent overheating.
Factors like humidity can affect the efficiency of sweat evaporation; with higher humidity, the evaporation rate is reduced, making it harder for the body to cool down. Adequate fluid intake is essential to maintain the body's sweat response and to avoid dehydration.