Which condition is characterized by shivering stopping at about 85–90°F and a high risk of death below 77–85°F, and is prevented by layered waterproof clothing?

Which condition is characterized by shivering stopping at about 85–90°F and a high risk of death below 77–85°F, and is prevented by layered waterproof clothing?

• A. Hypothermia
• B. Hyperthermia
• C. Frostbite
• D. Dehydration

Answer: (A)

Hypothermia occurs when the body's core temperature drops in cold conditions. Early on, shivering helps generate heat, but as cooling continues the shivering can stop around 85–90°F because the body's energy stores are depleted. When core temperature falls further, below about 77–85°F, the risk of death increases due to impaired heart and brain function. Layered waterproof clothing prevents hypothermia by trapping insulating air and reducing moisture and wind-driven heat loss. This set of signs and protection fits hypothermia, not overheating (hyperthermia), tissue freezing (frostbite), or dehydration.

Hypothermia occurs when the body's core temperature drops in cold conditions. Early on, shivering helps generate heat, but as cooling continues the shivering can stop around 85–90°F because the body's energy stores are depleted. When core temperature falls further, below about 77–85°F, the risk of death increases due to impaired heart and brain function. Layered waterproof clothing prevents hypothermia by trapping insulating air and reducing moisture and wind-driven heat loss. This set of signs and protection fits hypothermia, not overheating (hyperthermia), tissue freezing (frostbite), or dehydration.