Biology: Homeostasis and Stress Response
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Questions and Answers

What is the primary function of the autonomic nervous system?

  • To facilitate digestion
  • To control involuntary actions (correct)
  • To regulate body temperature
  • To control voluntary muscle movements
  • Which hormone is associated with the Fight or Flight Response and increases heart rate and blood pressure?

  • Epinephrine (correct)
  • Insulin
  • Oxytocin
  • Cortisol
  • What is the purpose of peripheral vasoconstriction during the Fight or Flight Response?

  • To increase oxygen intake
  • To facilitate digestion
  • To increase blood pressure
  • To direct blood to the core and vital organs (correct)
  • Which system is responsible for initiating the Fight or Flight Response?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What is the main function of the adrenal cortex during the Fight or Flight Response?

    <p>To produce glucocorticoids</p> Signup and view all the answers

    What is the Tend and Befriend Response characterized by?

    <p>Affiliative behavior and social support</p> Signup and view all the answers

    What is the primary function of cortisol during the Fight or Flight Response?

    <p>To redistribute glucose energy and suppress the immune system</p> Signup and view all the answers

    Who coined the term 'Fight or Flight Response' to describe the body's response to stressors?

    <p>Walter Cannon</p> Signup and view all the answers

    What is the primary focus of Hans Selye's research that led to the concept of General Adaptation Syndrome?

    <p>Understanding the body's adaptive response to stress</p> Signup and view all the answers

    Which phase of the General Adaptation Syndrome is characterized by increased heart rate, blood pressure, and resource mobilization?

    <p>Alarm Phase</p> Signup and view all the answers

    What is the result of prolonged stress on the body according to the General Adaptation Syndrome?

    <p>Depleted resources and tissue damage</p> Signup and view all the answers

    What is the primary reason why the body is unable to handle chronic stress?

    <p>The body is equipped to handle short-term stress, but not prolonged exposure</p> Signup and view all the answers

    What is a potential consequence of chronic stress on the body?

    <p>Tissue damage and muscle damage</p> Signup and view all the answers

    What is the primary difference between the Alarm Phase and the Resistance Phase of the General Adaptation Syndrome?

    <p>The Alarm Phase mobilizes resources, while the Resistance Phase fights or flees.</p> Signup and view all the answers

    What is the primary consequence of chronic stress on the body, according to the General Adaptation Syndrome?

    <p>The body's resources are depleted, leading to tissue damage and impaired immunity.</p> Signup and view all the answers

    What is the relationship between the General Adaptation Syndrome and the body's response to stress?

    <p>The General Adaptation Syndrome describes the body's adaptive response to stress.</p> Signup and view all the answers

    What is the primary characteristic of the Exhaustion Phase of the General Adaptation Syndrome?

    <p>The body's resources are depleted, leading to tissue damage and impaired immunity.</p> Signup and view all the answers

    What is the primary focus of research on the General Adaptation Syndrome?

    <p>Describing the body's adaptive response to stress.</p> Signup and view all the answers

    What is the primary function of the body's ability to maintain internal stability in response to environmental changes?

    <p>To maintain homeostasis</p> Signup and view all the answers

    Which system is responsible for controlling involuntary actions, including the sympathetic nervous system?

    <p>Autonomic nervous system</p> Signup and view all the answers

    What is the result of the shutdown of non-essential functions during the Fight or Flight Response?

    <p>Redirected energy to vital organs</p> Signup and view all the answers

    What is the primary function of the adrenal medulla during the Fight or Flight Response?

    <p>To produce hormones that support the sympathetic nervous system</p> Signup and view all the answers

    What is the primary function of glucocorticoids during the Fight or Flight Response?

    <p>To redistribute glucose energy and suppress the immune system</p> Signup and view all the answers

    What is the role of oxytocin in the Tend and Befriend Response?

    <p>To moderate the stress response</p> Signup and view all the answers

    What is the primary difference between the Fight or Flight Response and the Tend and Befriend Response?

    <p>The focus on affiliative behavior and social support</p> Signup and view all the answers

    What is the result of the body's inability to maintain homeostasis in response to chronic stress?

    <p>Disruption of bodily functions</p> Signup and view all the answers

    Study Notes

    Homeostasis and Stress Response

    • Homeostasis is the body's ability to maintain internal stability in response to environmental changes.
    • Walter Cannon, an American doctor, studied homeostasis and coined the term "Fight or Flight Response" to describe the body's response to stressors.

    Fight or Flight Response

    • The Fight or Flight Response is a homeostatic response to threats or dangers, preparing the body to either fight or flee.
    • This response involves the nervous system and endocrine system.
    • The sympathetic nervous system is responsible for initiating the Fight or Flight Response.
    • The autonomic nervous system, a branch of the nervous system, controls involuntary actions, including the sympathetic nervous system.
    • In the Fight or Flight Response, the body experiences:
      • Increased heart rate to pump blood with oxygen and nutrients.
      • Increased respirations to intake oxygen and expel carbon dioxide.
      • Peripheral vasoconstriction to direct blood to the core and vital organs.
      • Shutdown of non-essential functions, such as digestion and immune function.

    Endocrine System's Role in Fight or Flight Response

    • The endocrine system supplies hormones that support the sympathetic nervous system.
    • The adrenal glands, located on top of the kidneys, produce hormones that contribute to the Fight or Flight Response.
    • The adrenal medulla produces catecholamine hormones, including epinephrine and norepinephrine, which increase heart rate and blood pressure.
    • The adrenal cortex produces glucocorticoids, including cortisol, which redistributes glucose energy and suppresses the immune system.

    Tend and Befriend Response

    • The Tend and Befriend Response is an alternative response to stress, characterized by affiliative behavior and social support.
    • Oxytocin, a hormone associated with pair bonding, moderates the stress response and is involved in the Tend and Befriend Response.

    General Adaptation Syndrome (GAS)

    • Hans Selye's research built upon Cannon's work and led to the concept of the General Adaptation Syndrome (GAS).
    • GAS describes the body's adaptive response to stress, consisting of three phases:
      • Alarm Phase: initial stress response, characterized by increased heart rate, blood pressure, and resource mobilization.
      • Resistance Phase: the body attempts to fight or flee, with elevated temperature, blood pressure, and breathing rate, and increased stress hormone production.
      • Exhaustion Phase: prolonged stress leads to depleted resources, damage to tissues and muscles, and increased susceptibility to illness.

    Consequences of Chronic Stress

    • Chronic stress can have damaging effects on the body, including tissue damage, muscle damage, and impaired immunity.
    • The body is equipped to handle short-term stress, but prolonged exposure to stress can lead to exhaustion and negative consequences.

    Homeostasis and Stress Response

    • Homeostasis is the body's ability to maintain internal stability in response to environmental changes.
    • Walter Cannon coined the term "Fight or Flight Response" to describe the body's response to stressors.

    Fight or Flight Response

    • The Fight or Flight Response is a homeostatic response to threats or dangers, preparing the body to either fight or flee.
    • This response involves the nervous system and endocrine system.
    • The sympathetic nervous system initiates the Fight or Flight Response.
    • The autonomic nervous system controls involuntary actions, including the sympathetic nervous system.
    • The response causes:
      • Increased heart rate to pump blood with oxygen and nutrients.
      • Increased respirations to intake oxygen and expel carbon dioxide.
      • Peripheral vasoconstriction to direct blood to the core and vital organs.
      • Shutdown of non-essential functions, such as digestion and immune function.

    Endocrine System's Role in Fight or Flight Response

    • The endocrine system supplies hormones that support the sympathetic nervous system.
    • The adrenal glands produce hormones that contribute to the Fight or Flight Response.
    • The adrenal medulla produces catecholamine hormones, including epinephrine and norepinephrine.
    • The adrenal cortex produces glucocorticoids, including cortisol.
    • Epinephrine and norepinephrine increase heart rate and blood pressure.
    • Cortisol redistributes glucose energy and suppresses the immune system.

    Tend and Befriend Response

    • The Tend and Befriend Response is an alternative response to stress, characterized by affiliative behavior and social support.
    • Oxytocin moderates the stress response and is involved in the Tend and Befriend Response.

    General Adaptation Syndrome (GAS)

    • Hans Selye's research built upon Cannon's work and led to the concept of the General Adaptation Syndrome (GAS).
    • GAS describes the body's adaptive response to stress, consisting of three phases:
      • Alarm Phase: initial stress response, characterized by increased heart rate, blood pressure, and resource mobilization.
      • Resistance Phase: the body attempts to fight or flee, with elevated temperature, blood pressure, and breathing rate, and increased stress hormone production.
      • Exhaustion Phase: prolonged stress leads to depleted resources, damage to tissues and muscles, and increased susceptibility to illness.

    Consequences of Chronic Stress

    • Chronic stress can have damaging effects on the body, including tissue damage, muscle damage, and impaired immunity.
    • The body is equipped to handle short-term stress, but prolonged exposure to stress can lead to exhaustion and negative consequences.

    Homeostasis and Stress Response

    • Homeostasis is the body's ability to maintain internal stability in response to environmental changes.
    • Walter Cannon coined the term "Fight or Flight Response" to describe the body's response to stressors.

    Fight or Flight Response

    • The Fight or Flight Response is a homeostatic response to threats or dangers, preparing the body to either fight or flee.
    • This response involves the nervous system and endocrine system.
    • The sympathetic nervous system initiates the Fight or Flight Response.
    • The autonomic nervous system controls involuntary actions, including the sympathetic nervous system.
    • The response causes:
      • Increased heart rate to pump blood with oxygen and nutrients.
      • Increased respirations to intake oxygen and expel carbon dioxide.
      • Peripheral vasoconstriction to direct blood to the core and vital organs.
      • Shutdown of non-essential functions, such as digestion and immune function.

    Endocrine System's Role in Fight or Flight Response

    • The endocrine system supplies hormones that support the sympathetic nervous system.
    • The adrenal glands produce hormones that contribute to the Fight or Flight Response.
    • The adrenal medulla produces catecholamine hormones, including epinephrine and norepinephrine.
    • The adrenal cortex produces glucocorticoids, including cortisol.
    • Epinephrine and norepinephrine increase heart rate and blood pressure.
    • Cortisol redistributes glucose energy and suppresses the immune system.

    Tend and Befriend Response

    • The Tend and Befriend Response is an alternative response to stress, characterized by affiliative behavior and social support.
    • Oxytocin moderates the stress response and is involved in the Tend and Befriend Response.

    General Adaptation Syndrome (GAS)

    • Hans Selye's research built upon Cannon's work and led to the concept of the General Adaptation Syndrome (GAS).
    • GAS describes the body's adaptive response to stress, consisting of three phases:
      • Alarm Phase: initial stress response, characterized by increased heart rate, blood pressure, and resource mobilization.
      • Resistance Phase: the body attempts to fight or flee, with elevated temperature, blood pressure, and breathing rate, and increased stress hormone production.
      • Exhaustion Phase: prolonged stress leads to depleted resources, damage to tissues and muscles, and increased susceptibility to illness.

    Consequences of Chronic Stress

    • Chronic stress can have damaging effects on the body, including tissue damage, muscle damage, and impaired immunity.
    • The body is equipped to handle short-term stress, but prolonged exposure to stress can lead to exhaustion and negative consequences.

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    Description

    Learn about homeostasis, the body's ability to maintain internal stability, and the Fight or Flight Response, a homeostatic response to threats or dangers.

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