Fight-or-Flight Response

Definition

The fight-or-flight response is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. It is a survival mechanism that prepares the body to either fight the threat or flee from it.

5 Must Know Facts For Your Next Test

1. The fight-or-flight response is triggered by the activation of the sympathetic nervous system, which prepares the body to either confront a threat (fight) or flee from it (flight).
2. During the fight-or-flight response, the body experiences increased heart rate, blood pressure, and breathing rate, as well as the release of glucose and fats to provide energy.
3. The fight-or-flight response also suppresses non-essential functions like digestion and the immune system in order to divert resources to the muscles and brain.
4. Chronic activation of the fight-or-flight response can lead to long-term health problems, such as high blood pressure, heart disease, and weakened immune function.
5. The fight-or-flight response is an evolutionary adaptation that helped our ancestors survive in dangerous situations, but it can be maladaptive in modern, low-threat environments.

Review Questions

• Describe how the fight-or-flight response is triggered and the physiological changes that occur.
  • The fight-or-flight response is triggered by the activation of the sympathetic nervous system in response to a perceived threat or stressor. This leads to the release of hormones like adrenaline and cortisol, which cause a rapid increase in heart rate, blood pressure, and breathing rate. The body also diverts blood away from the digestive system and towards the muscles, while glucose and fats are released to provide energy. These physiological changes prepare the body to either confront the threat (fight) or flee from it (flight).
• Explain how the fight-or-flight response is related to the concepts of stress and illness.
  • The fight-or-flight response is a key component of the body's stress response. When the body is under stress, the fight-or-flight response is activated, leading to the physiological changes described earlier. While the fight-or-flight response is adaptive in the short-term, chronic activation of this response can have negative consequences for health. Prolonged stress and the resulting fight-or-flight response can weaken the immune system, increase the risk of cardiovascular disease, and contribute to the development of other stress-related illnesses.
• Analyze how the regulation of the fight-or-flight response can be used to manage anxiety disorders.
  • Anxiety disorders are characterized by an excessive or inappropriate activation of the fight-or-flight response. Techniques that help regulate the fight-or-flight response, such as relaxation methods, mindfulness practices, and cognitive-behavioral therapy, can be effective in managing anxiety disorders. By learning to control the physiological and psychological components of the fight-or-flight response, individuals with anxiety disorders can better cope with and reduce the severity of their symptoms. The regulation of the fight-or-flight response is a key aspect of the treatment and management of anxiety disorders.

Related terms

Sympathetic Nervous System:

The part of the autonomic nervous system responsible for activating the fight-or-flight response, increasing heart rate, blood pressure, and energy mobilization.

Stress Response: The body's immediate reaction to a perceived harmful event, attack, or threat to survival, which triggers the fight-or-flight response.

Adrenal Glands:

The endocrine glands that release hormones like adrenaline and cortisol, which play a key role in the physiological changes associated with the fight-or-flight response.