What would happen if a person was not able to control his or hers internal temperature?

If a person is unable to regulate their internal body temperature, they may experience hyperthermia (overheating) or hypothermia (excessive cooling), both of which can be life-threatening. This inability can lead to serious health issues, including heat stroke, organ failure, or severe complications from prolonged exposure to cold. The body's normal mechanisms for maintaining temperature, such as sweating or shivering, would be compromised, potentially resulting in severe discomfort and health risks. Immediate medical attention would be necessary to prevent long-term damage or fatality.