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4538664
Thermoregulation
Description
Degree Veterinary medicine (POS) Mind Map on Thermoregulation, created by Joanne Wills on 16/02/2016.
No tags specified
veterinary science
veterinary medicine
pos
degree
Mind Map by
Joanne Wills
, updated more than 1 year ago
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Created by
Joanne Wills
over 8 years ago
139
3
0
Resource summary
Thermoregulation
Poikilotherm
temperature same as environment
ectotherm
invertebrates, fish, amphibia, reptiles
Homeotherm
endotherm
maintain body temperature regardless of environment
requires high metabolic rate
mammals, birds
Heat production
increased metabolism
muscle contraction
shivering
exercise
non-shivering thermogenesis
Heat loss
non-evaporative heat transfer to environment
convection
conduction
radiation
evaporative heat loss
from body surface and respiratory system
Factors affecting heat exchange
physical
weather, size/shape, insulation, colour, peripheral blood flow
behavioural
too hot
avoid sun
Annotations:
seek shade, burrow
increase evaporative heat loss
Annotations:
wallow, spray, lick fur
increase non-evaporative heat loss
Annotations:
postural changes - spread out to increase surface area
too cold
reduce sensible heat loss
shelter
huddle
freeze
Annotations:
avoids water penetration
Piloerection
cold
maximum boundary layer
increased insulation
hot
reduced boundary layer
decreased insulation
controlled by sympathetic innervation
Sweat glands
evaporative heat loss
secretion controlled by sympathetic innervation
contents
Annotations:
water, urea, lactic acid, sodium, potassium, sometimes protein herbivores preferentially lose potassium so conserves water loss
HYPOTHERMIA
heat loss exceeds capacity for heat production
temperature drops
Annotations:
reduced CO and BP, decreased oxygen consumption, increased blood viscosity, reduced mental abilities, lose consciousness
HYPERTHERMIA
heat production exceeds ability to lose heat
excess water and salt loss
Media attachments
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438ebf20-1573-4251-b566-d094bdecbce3 (image/png)
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