Component of peripheral nervous system that regulates involuntary physiologic processes including heart rate, blood pressure, respiration, digestion and sexual arousal.
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What is the parasympathetic nervous system?
P for peace
Network of nerves that relax your body after periods of stress.
Helps run life sustaining processes, like digestion.
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What is the sympathetic nervous system?
S for stress.
A network of nerves that helps your body activate its "fight-or-flight" response.
Occurs when you're stressed, in danger or physically active.
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What are the key clinical manifestations of asthma? (5)
Cough
Wheeze
Shortness of Breath
Cyanosis
Tachypnoea
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What do efferent pathways do?
Carry signals away from the CNS.
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What do afferent signals do?
Afferent signals come from outside stimuli and tell your brain what they are sensing, such as temperature.
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How does a cough occur?
*outside allergen*
Impulses from cough receptors cross an afferent pathway via vagus nerve to the medulla. This generates an efferent signal back down to expiratory muscles to produce the cough.
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How does wheeze occur?
Lower airway inflammation -> collapse of lung alveoli -> crackles heard on auscultation
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What is dyspnea?
It is a sensation of running out of air and not being able to breathe fast enough and deep enough.
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What is hypoxaemia?
A lower than normal arterial blood oxygen level.
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What is hypoxia?
Refers to lack of oxygen at a cellular level.
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What is cyanosis?
This can mean there's not enough oxygen in the blood, or poor blood circulation.
Cause of blue skin or lips.
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Other cards in this set
Card 2
Front
What happens with asthma?
Back
It involves symptoms of airflow obstruction and bronchial hyper responsiveness.
Card 3
Front
What is the pathophysiology and components of asthma?
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