Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Physiological changes refer to the alterations that occur in the body's normal functioning or physical state. These changes can involve various bodily processes, including heart rate, blood pressure, hormone levels, and immune system activity.
Homeostasis refers to the body's ability to maintain internal stability despite external changes. It involves keeping physiological variables within certain limits to ensure optimal functioning.
Fight-or-flight response: The fight-or-flight response is an automatic physiological reaction triggered by a perceived threat or stressor. It prepares the body for action by increasing heart rate, releasing stress hormones like adrenaline, and redirecting blood flow to essential organs.
Allostatic load: Allostatic load refers to the cumulative wear and tear on the body due to chronic exposure to stressors. It encompasses both immediate physiological responses and long-term consequences of ongoing stress.