Homeostasis refers to the body's ability to maintain a relatively stable internal environment despite changes inside or outside the body. You will examine processes including:

For example, thermoregulation depends on several body systems working together through mechanisms such as sweating, vasodilation, vasoconstriction, shivering, and non-shivering thermogenesis . Factors such as training status, body composition, environmental conditions, and sex differences can also influence thermoregulation. At HL, this topic is extended to consider the body's acute responses and longer-term adaptations to environmental conditions , including temperature, humidity, and altitude.