IS-B1-Temperature Regulation
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| Heat input + heat production > heat output, then _ in body temp occurs. | Increase
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| Which fluctuates more - skin temperature or core temperature? | Skin temperature
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| Between what two measures of ambient temperature can the body maintain core temperature homeostasis? | 55 F and 130 F
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| What is the range for normal temperature in most people? | 97 to 99.5
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| Above 101 F is only found in situations like what? | Fever or Hard Exercise
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| Normal regulation of temperature inside the body can occur between what temperatures? | 95 F and 105F
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| Name the 2 main types of temperature receptors. | Hypothalamus and Skin
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| True or False - Hypothalamus has a greater number of heat sensitive neurons than cold sensitive neurons. | True
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| True or False - The Skin has a greater number of cold sensory receptors than heat sensory receptors. | True
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| What is considered the temperature regulation center of the brain? | Hypothalamus
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| Name 4 ways the body can adjust to regulate the core temperature of the body. | 1) sweating
2) vasodilation/vasoconstriction
3) physical activity/metabolism (hormones)
4) behavioral responses (clothing, shelter)
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| How does the body manipulate the vasculature to increase or decrease heat loss? | Vasoconstriction (decrease heat loss)
Vasodilation (increase heat loss)
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| When there is a decrease in body temperature, the sympathetics in skin stimulate blood vessels via norepinephrine which causes what? | Reflex vasoconstriction
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| When there is an increase in body temperature, the sympathetic stimulation to the sweat glands increases which releases acetylcholine and some other unknown factor which results in what? | Vasodilation of skin vessels
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| What is the set point temperature? | 37.1 degrees Celsius
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| If the core temperature is greater that the set point, how does the hypothalamus respond? | 1) decreased muscle activity and chemical heat production
2) decreases adrenergic sympathetic stimulation -increase cutaneous vasodilation
3) increase sweating
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| True or false - the temperature of the skin has no bearing on the response of the hypothalamus when interpreting temperature. | False - skin alters strength of the response.
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| If the core temperature is lower than the set point, how does the hypothalamus respond? | 1) increases muscle activity and chemical heat production
2) increases adrenergic sympathetic stimulation which causes reflex vasoconstriction
3) decreases sweating
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| When exogenous pyrogens (infections) or endogenous pyrogens (cytokines) increase, they influence prostaglandins to increase what? What does this cause? | The set point. A fever
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| Heat stroke occurs when the temperature rises above _ degrees F. | 105
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| What is a common side effect of heat stroke? | decreased brain perfusion
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| What can occur in the case of severe hypothermia? | Ventricular Fibrillation.
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