Biological Psych 7: Stress (Lec 31) Flashcards
Persistent stress that is not resolved through coping or
adaptation results in…
Distress
Stress that enhances function is called…
Eustress
Give an example of an environmental condition disturbing homeostasis, and the bodies reaction to maintain it
Cold causes us to shiver
An event which disrupts homeostasis, anything which requires exerting effort is a…
stressor
The feedback centre for the body’s homeostasis system using part of the brain as a relay centre. Which part is it?
The hypothalamus
A causes B, B causes A.
A causes B, B inhibits A.
Which is negative and which is positive feedback?
negative feedback involves inhibition
If a stressor is maintained beyond the alarm phase, the ______ phase in the body’s feedback system kicks in. This eventually leads to exhaustion.
the resistance phase
As one of the first responses to the alarm phase, under control of the SNS (sympathetic nervous system), which hormone is released?
Adrenalin release
What is the difference between the sympathetic and PNS (parasympathetic nervous system)?
The SNS (sympathetic nervous system) is usually the first to kick in during stress response. The PNS (parasympathetic nervous system) acts to calm it down.
Name the 3 main hormones which are released by the ANS (autonomic nervous system), and their basic functions
- Acetylcholine: Triggers NA (noradrenalin) release
- Noradrenaline / Norepinephrine: arousal (excitatory)
- Adrenaline / Epinephrine: arousal
Dilating pupils, hairs standing on end are examples of…
The SNS (Sympathetic nervous system) reactions…
The LC (Locus coeruleus), the major nucleus fin the pons associated with physiological responses to stress and panic. It’s the main source of noradrenaline and is associated with arousal and vigilance. It’s main physiological purpose is to increase…
reaction speed
Emotional memories are more durable than non-emotion fused memories. What neurotransmitter pulsing through the brain is largely responsible for this?
Noradrenaline
What is the major role of the glucocorticoid hormones, when they diffuse throughout the body’s tissues?
-Increase the release of energy stores (fats or glycogen which are stored in muscles)
The glucocorticoids are part of which axis system?
The HPA axis
CRH (corticotropin releasing hormone) is in a positive feedback loop with which neurotransmitter?
Noradrenalin