What type of stress is the sympathomedullary pathway associated with?
Immediate (acute) stressors
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What do acute stressors arouse?
The autonomic nervous system (ANS)
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What is the ANS divided into?
The sympathetic branch (SNS) and the parasympathetic branch
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What effect does activation of the SNS have on the animal?
It arouses the animal for fight or flight
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What effect does the activation of the parasympathetic branch have on the animal?
It returns it back to a state of relaxation
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What branch of the ANS is activated when the animal is exposed to an acute stressor?
The SNS
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What is a key part of the sympathomedullary pathway activation?
The SAM system
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What do the SNS and the SAM system make up?
The sympathomedullary pathway
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What happens when the SNS is activated?
Neurones from it travel to virtually every organ and gland in the body, preparing it for rapid action
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What are the responses on the body to the activation of the SNS?
Increased heart rate, blood pressure and cardiac output. Increased pupil size. Metabolic changes such as the mobilisation of fat and glycogen in the bloodstream.
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What is noradrenaline?
The neurotransmitter released by SNS to activate the internal body organs
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Other cards in this set
Card 2
Front
What do acute stressors arouse?
Back
The autonomic nervous system (ANS)
Card 3
Front
What is the ANS divided into?
Back
Card 4
Front
What effect does activation of the SNS have on the animal?
Back
Card 5
Front
What effect does the activation of the parasympathetic branch have on the animal?
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