eature=endscreen &v=4g25d7_Afmc ( discovery channel.
16
Bodily Responses To Stress The Sympathetic Adrenal Medullary Axis The Hyp othalam ic Pituita ry Adrenal Axis The Nerv ous System
-
Upload
casey-hylton -
Category
Documents
-
view
252 -
download
4
Transcript of eature=endscreen &v=4g25d7_Afmc ( discovery channel.
Bodily Responses To Stress
The Sympathetic
Adrenal Medullary AxisThe Hypothalamic
Pituitary Adrenal Axis
The Nervous System
http://www.youtube.com/watch?v=xb7NnEpfvSM&NR=1&feature=endscreen
http://www.youtube.com/watch?NR=1&feature=endscreen&v=4g25d7_Afmc
( discovery channel police man)
What is stress, and what does it do to us?
The nervous system
CNS (central nervous system)
PNS (peripheralnervous system)
SNS (somatic nervous system)
ANS (autonomic nervous system)
Sympathetic arousal
(involuntary)
Parasympathetic arousal
(involuntary)
Sensory and motornerves (voluntary)
Brain Spinal cord
The Nervous System
Central Nervous System
Peripheral Nervous System
Brain Spinal Chord
Autonomic Nervous System
[Muscles]
SomaticNervous System
[Bones]
Sympathetic Nervous System
Parasympathetic Nervous System
The Sympathetic Branch of the Autonomic Nervous System is responsible for the SAM Response to Stress.
It is responsible for Physical Arousal of the body when dominant (due to a Stressor).
The Nervous System
Sympathetic Nervous System
The Parasympathetic Branch of the Autonomic Nervous System is responsible for Counteracting the SAM Response to a Stressor.
It is responsible for Relaxation and Energy Conservation.
The Nervous SystemParasympathetic Nervous
System
The Sympathetic Adrenal Medullary Axis
SAM – The Immediate Response to a Stressor.1. The Hypothalamus:
Activates the Sympathetic Branch of the Autonomic Nervous System - ANS.
2. This sends Neuron-Messages to the Inner Core of the Adrenal Gland, the Adrenal Medulla.
3. This results in the secretion of Adrenaline and Nor-adrenaline.
Part of the brain!
The Sympathetic Adrenal Medullary Axis
SAM – The Immediate Response to a Stressor.The Results of Adrenaline and Nor-Adrenaline
Adrenaline and Nor-Adrenaline are released into the Bloodstream.
This causes the Fight or Flight Response.Physiological changes occur such as:
Increased Oxygen & Glucose to Brain & MusclesIncreased Heart RateDeeper RespirationDilating PupilsDigestion Suppression
The Sympathetic Adrenal Medullary Axis
The Hypothalamus The ANS
The Adrenal Medulla
Adrenaline and Nor-Adrenaline
Activates
Caus
es
To Release…
The Hypothalamic Pituitary Adrenal Axis
HPA – The Long Term Response to a Stressor.1. The Hypothalamus:
Activates the Pituitary Gland.2. This causes ACTH [Stress Hormone] to be
released.3. This stimulates the Outer Edge of the Adrenal
Gland, the Adrenal Cortex.4. This allows the production of Glucocorticoids –
Glucose and Cortisol.
Part of the brain!
An endocrine gland!
An endocrine gland!
Adrenal cortex(remember it by thinking of it as the ‘covering’ layer of the adrenal gland!
HPA – The Long Term Response to a Stressor.The Results of Glucose and Cortisol
Glucocorticoids are released into the Liver to release stored Glucose.
This causes the Immune System to be suppressed. Other Effects Include:
✓ Heightened and Maintainable Energy Supply
✓ Lower Pain Sensitivity
✗ Lower Immune Response
✗ High Blood Pressure
The Hypothalamic Pituitary Adrenal Axis
The Hypothalamus
Pituitary Gland
ACTH
Cortisol and Glucose
Activates
Caus
es th
e Re
leas
e of
…
The Hypothalamic Pituitary Adrenal Axis
Which Acts on…
Adrenal Cortex
To Release…
