🔍 Key Concepts

• Heat exhaustion and how the body loses water AND electrolytes through heavy sweating • The role of salt (electrolytes) and carbohydrates in fluid replacement during hard physical work in heat • Why caffeine and high salt without water can be risky in hot environments

💭 Think About

• When you sweat heavily in a hot engine room, what exactly are you losing from your body besides water? • Which option replaces what you actually lose in sweat, without causing dehydration or overloading you with salt? • How might caffeine or taking salt tablets with only a little water affect your body’s fluid balance?

✅ Before You Answer

• Eliminate any options that can worsen dehydration (think about diuretic effects like caffeine). • Compare options that give only water versus those that provide water plus electrolytes (salts) and some energy (carbohydrates). • Be cautious of any option that uses salt tablets without adequate water or that can disturb your body’s salt balance in the heat.