FoM:L10 - Thermoregulation Flashcards
1
Q
What is normal body temp? Where is it recorded?
A
- 36.8C (+- 0.5C)
- rectal, IV lines (core); skin, ear (peripheral)
2
Q
Why is thermoregulation important?
A
- increased temp increase rate of reaction to a point
- excessive temp. denatures proteins
- reduced temperature is tolerated better
- lower temp = slower functions
3
Q
What are thermoreceptors?
A
- free nerve ending (type)
- receptor portion of sensory neurone converts changes in temp to changes in activity of neuron
- classed by location and temps they respond to
4
Q
What are tonic and phasic responses?
A
tonic neuronal activity
- increase/decrease in response to absolute temp
phasic
- response to change
- acclimatisation over time
5
Q
What are responses to high temperature?
A
- sweat glands
- vasodilation
6
Q
What are responses to low temperature?
A
- vasoconstriction
- shivering/thermogenesis (skeletal muscles)
- potentially brown fat
7
Q
How is heat gained/lost from the body?
A
- radiation (both)
- conduction (both)
- internal heat production from metabolism and muscle contraction (gain)
- evaporation (loss)
8
Q
What are the symptoms of hypo and hyper -thermia?
A
hypo:
- frostbite
- muscle weakness/shivering
- confusion
hyper:
- related to cause of infection
- fainting
9
Q
Why are there variations in body temp?
A
- physiological (menstrual/menopausal)
- pathological (pyrogens, response to infection)
