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Stress

The physiology of stress

  • 4 things to know
  • Paper 3

Overview

Selye's General Adaptation Syndrome, the acute response that produces immediate arousal, the hypothalamic-pituitary-adrenal response, and the role of cortisol in prolonged stress.

What you need to know

Answer each one before you reveal it.

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Process

What are the three stages of Selye's General Adaptation Syndrome?

Process

Outline the hypothalamic-pituitary-adrenal response to a stressor.

Process

Outline the acute stress response that produces immediate physiological arousal.

Key term

What does cortisol do during prolonged stress?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is General Adaptation Syndrome (GAS)?

    Model answer

    Selye's model describing the body's short-term and long-term physiological response to stress in three stages.

  2. 2

    How many stages are there in Selye's General Adaptation Syndrome?

    Model answer

    Three stages: alarm, resistance, and exhaustion.

  3. 3

    What happens during the alarm stage of GAS?

    Model answer

    The initial shock response occurs where the sympathetic nervous system is activated, preparing the body for fight or flight.

  4. 4

    Which branch of the nervous system is activated during the alarm stage of GAS?

    Model answer

    The sympathetic nervous system.

  5. 5

    What characterises the resistance stage of GAS?

    Model answer

    The body attempts to adapt to the continued presence of the stressor, with the parasympathetic nervous system dampening the stress response while the body remains on alert.

  6. 6

    What role does the parasympathetic nervous system play during the resistance stage?

    Model answer

    It dampens the stress response while the body remains on alert.

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