The best answer is A, True. Heat exhaustion is the body's response to an excessive loss of water and salt contained in sweat.

The best answer is B, False. The people most prone to heat exhaustion are senior adults over the age of 65, those with high blood pressure or other heart-related conditions, and people working or exercising in a hot environment.

The best answer is A, True. Sweat glands can get blocked for many reasons including tight clothing that prevents sweat from evaporating, heavy creams or lotions that clog sweat ducts, and skin rubbing against adjacent skin that also prevents sweat from evaporating.

The best answer is B, False. Actual warning signs for heat exhaustion include fatigue, headache, excessive sweating, pale skin, muscle cramps, weakness, dizziness, fainting, and nausea or vomiting.

The best answer is A, True. Without proper intervention, heat exhaustion can progress to heat stroke, which can damage the brain and other vital organs, and even cause death.

The best answer is B, False. There are only 2 types of heat exhaustion: water depletion and salt depletion. Symptoms of water depletion typically include excessive thirst, weakness, headache, and loss of consciousness. Symptoms of salt depletion include nausea and vomiting, muscle cramps, and dizziness.