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21 Cards in this Set
- Front
- Back
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what factors influence the body's temperature set point?
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age, health, exercise, time of day
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by what processes is heat transferred from tissue/organ to skin?
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convection and conduction
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by what processes is heat transferred to/from the skin and environment?
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radiation, evaporation, convection and conduction
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sympathetic mediated vasoconstriction is a response to hot or cold? What neurotransmitter is involved?
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cold; norepi
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sympathetic vasodilation is a response to hot or cold? what neurotransmitter is involved?
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hot; ACh
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What causes shivering (more specifically than being cold)
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loss of negative regulatory input to the posterior hypothalmus from the preoptic area. signals are then sent to motor neurons
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Temperature set point is maintained by the ___________
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hypothalmus
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Core temperature is lowest at what time of day?
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night (3AM-6AM)
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Core temperature tends to ________ with age
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decrease
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What hormone increases core temperature during the menstrual cycle?
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progesterone
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Men tend to have a ________ core body temp. Why?
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higher; increased muscle mass
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A fan will lower body temp through what heat transfer process?
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convection
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a cold compress will lower body temperature through what heat transfer process?
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conduction
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the sun warms the body through what heat transfer process?
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radiation
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How are sweat glands trained?
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efficiency is increased with exercise. they begin producing more sweat
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Where are glomulus bodies located? How do they transfer heat?
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Apical skin; passive vasodilation
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What neurotransmitter causes vasodilation and sweat production in non-apical skin?
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ACh produced by sympathetic innervation
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Cold receptors send __________ signals to the preoptic area. The posterior hypothalmus is __________ by the anterior hypothalmus
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inhibited; inhibited (inhibiting the inhibitor triggers the shiver reflex)
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Pyrogens _______ Tset, Acclimatization ________ Tset.
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increases; lowers
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acute exercise changes the Tset (true/false)
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false
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fever changes the Tset (true/false)
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true
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