ch14 exercise in hot and cold enviroments Flashcards
the 4 ways heat is lost or gained from the environment
conduction, convection, radiation, evaporation
what is conduction (k)
transfer of heat from one solid material to another through direct contact
what is convection (c)
transfer of heat by motion of
gas or liquid across a heated surface
what is radiation (R)
heat exchange in the form of
infrared rays
what is evaporations (E) effect on heat exchange
fluid evaporates and carries heat with it
what is the primary avenue of heat loss
evaporation
what can cause resistance to evaporation
clothing, high humidity
when does convection not work
when air temperature is greater than skin temperature
what is caused by prolonged evaporation of sweat
dehydration
example of heat gain from conduction
heat from the ground
example of heat loss from convection
breathing/ respiratory heat exchange,
example of heat loss from evaporation
sweating
example of heat gain from radiation
heat from the sun
example of heat loss from radiation
the body radiating heat
what part of the brain is responsible for thermoregulatory control
preoptic- anterior hypothalamus
