2669819
Description
Mind Map by megs.harvey, updated more than 1 year ago
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Created by megs.harvey
over 9 years ago
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The Body's Response to Stress AO1
- The Sympathomedullary Pathway
- 4. PNS restores the body to
resting state after the stressor
has passed.
- PNS = slows down heartbeat and
reduces blood pressure.
- PNS = slows down heartbeat and
reduces blood pressure.
- 1. SNS prepares body for action in
times of acute stress.
- The 'fight or flight' response = rapid
action when an animal is under threat.
- The 'fight or flight' response = rapid
action when an animal is under threat.
- 2. Causes changes i.e increase
in heart rate + blood pressure.
- SNS also leads to metabolic changes i.e
mobilisation of fat and glucose in the
bloodstream.
- SNS also leads to metabolic changes i.e
mobilisation of fat and glucose in the
bloodstream.
- 3. Causes adrenal medulla to release
adrenaline into the bloodstream.
- Adrenaline = boosts oxygen + glucose supply
to brain and suppresses non-emergency
bodily processes.
- Adrenaline = boosts oxygen + glucose supply
to brain and suppresses non-emergency
bodily processes.
- 4. PNS restores the body to
resting state after the stressor
has passed.
- The Pituitary-Adrenal System
- 1. Activated under conditions of ongoing stress.
- 2. Activates HYPOTHALAMUS = releases CRF
into bloodstream.
- Hypothalamus is activated when stressors are perceived by higher brain centres.
- Hypothalamus is activated when stressors are perceived by higher brain centres.
- 3. CRF causes PITUITARY GLAND to
release ACTH which is transported to the
ADRENAL CORTEX.
- ACTH = adrenacorticotrophic hormone
transported via bloodstream.
- ACTH = adrenacorticotrophic hormone
transported via bloodstream.
- 4. Activation of ARENAL CORTEX = release of
hormone CORTISOL.
- Prolonged release of ACTH = adrenal cortex
increases in size to cope with increased cortisol
production.
- Prolonged release of ACTH = adrenal cortex
increases in size to cope with increased cortisol
production.
- 5. CORTISOL has positive and negative effects
throughout the body.
- Positive effects of cortisol = lower sensitivity to pain.
- Negative effects of cortisol = lower immune response.
- Positive effects of cortisol = lower sensitivity to pain.
- 1. Activated under conditions of ongoing stress.
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