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Cards In This Set
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Define hyperthermia.
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When the body produces more heat than is lost
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Define hypothermia.
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When more heat is lost than is produced
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Define basal metabolic rate (BMR)
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Rate of energy utilization the body requires to maintain essential activities such as breathing-BMR decreases with age
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How does thyroxine output effect body's heat production?
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Increased thyroxine output increases the rate of cellular metabolism throughout the body
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What 5 main factors effect the body's heat production?
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BMRMuscle activityThyroxine OutputEpinephrine, norepinephrine, and symapathetic stimulationFever
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What happens to your metabolic rate when you shiver?
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It increases.-all muscle activity produces heat
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Define radiation.
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Transfer of heat from the surface of one object to the surface of another without contact between the 2 objects--usually infrared rays
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Define conduction.
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Transfer of heat from one molecule to a molecule of lower temperature
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Define convection.
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Dispersion of heat by air currents.-we always lose a small amount of heat thru this
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Define vaporization.
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Continuous evaporation of moisture from the respiratory tract, the mucosa of the mouth, and the skin
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When the skin becomes chilled over the entire body.....3 physiologic processes occur to attempt to regulate temperature. What are they?
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Shivering increases heat productionSweating is inhibited to decrease heat lossVasoconstriction decreases heat loss
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3 main parts within the body to regulate body temperature.....
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Sensors in the shell and the coreIntegrator in the hypothalamusEffector systems that adjusts the production and loss of heat
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Where is the core temperature controlled in the body?
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Hypothalamus
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If the hypothalamus senses cold-sensitive receptors it.......
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Vasoconstrictionshiveringrelease of epinephrine (increases cellular meta)
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If the hypothalamus sense warmth-sensitive receptors it.......
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Initiate sweatingperipheral vasodilation
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