stress physiology Flashcards
stress involves complex interactions of several body systems, what are these systems?
- nervous
- endocrine
- immune
name the 3 stages in stress
- alarm reaction
- resistance phase
- exhaustion phase
what does the alarm reaction of stress include?
- fight, flight, fright response
- physiological components
what does the resistance phase of stress include?
adapting to stressor
what does the exhaustion of stress include?
- sever/persistant stress
- system fails
- pathological effects
in what way can stress be described as not all bad?
a little can improve learning
what neural components are associated with the alarm reaction of stress?
- increased co (increased hr)
- redistribution of co (increased flow to muscles, decreased flow to gut)
- metabolic (glycogen to glucose)
- adrenaline release
what hormonal components are associated with the alarm reaction of stress?
- adrenaline release
- glucocorticoid release
which nervous system, parasympathetic or sympathetic, is activated in times of stress?
sns
what is the main stress hormone?
cortisol
what metabolic effects does cortisol have during times of stress?
- increased energy production
- increased protein breakdown
- enhance action of adrenaline
- anti-inflammatory
- immunosuppressant
glucocorticoids act as anti-inflammatories and immunosuppressive at times of stress, they do so by inhibiting what?
- release prostaglandins
- release of leukotriens’
- marcrophages
- helper T cells
what does stress analgesia refer to?
reduced pain response after stress exposure
stress analgesia occurs due to the release of what?
- endogenous opiod peptides
- endorphins
- enkephalins
what contributes to dental stress in patients?
- severity of treatement
- anxious/ dental phobics
- noise of dental instruments
- masks and gowns
- children
