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Questions and Answers

Which of the following is a characteristic of mild hypothermia?

  • Cardiac arrest
  • Impaired function
  • Confusion and loss of shivering (correct)
  • Loss of consciousness

    • What happens when the hypothalamic set point is raised?

  • The body feels hot and heat-dissipating mechanisms are induced
  • The body temperature increases
  • The body temperature decreases
  • The body feels cold and heat-generating mechanisms are induced (correct)

    • Which hormone increases the hypothalamic set point and raises body temperature?

  • Estrogen
  • Progesterone (correct)
  • Testosterone
  • Thyroxine

    • What is the effect of estrogens on the hypothalamic set point?

    <p>Decrease the hypothalamic set point and promote lower body temperatures</p> Signup and view all the answers

    Which of the following is a role of testosterone in body heat production?

    <p>Increase body heat production</p> Signup and view all the answers

    What is the effect of age-related changes in autonomic function on the range of body temperature?

    <p>The range narrows with age and declining hormone levels</p> Signup and view all the answers

    What is the effect of pyrogens on the hypothalamic set point?

    <p>Increase the hypothalamic set point, stimulating heat-generating mechanisms</p> Signup and view all the answers

    Which of the following is NOT a mechanism of heat loss for the body?

    <p>Metabolism</p> Signup and view all the answers

    What is the role of the hypothalamic set point in the negative feedback control of body core temperature?

    <p>To regulate the body's temperature set point</p> Signup and view all the answers

    Which of the following is true about the control of cutaneous blood flow and sweating on skin temperature?

    <p>Cutaneous blood flow increases skin temperature while sweating decreases skin temperature</p> Signup and view all the answers

    How does the change in core temperature during exercise differ from the change in core temperature during influenza?

    <p>Exercise increases core temperature, while influenza decreases core temperature</p> Signup and view all the answers

    What are the heat-conserving and -generating mechanisms of the body?

    <p>Cutaneous vasoconstriction and shivering</p> Signup and view all the answers

    What is the primary control of cutaneous circulation?

    <p>Sympathetic adrenergic nerves</p> Signup and view all the answers

    What is an exception to the control of cutaneous circulation by sympathetic adrenergic nerves?

    <p>Acclimatization</p> Signup and view all the answers

    Which of the following factors affects the rate of metabolism?

    <p>All of the above</p> Signup and view all the answers

    Which part of the brain is responsible for heat conserving mechanisms when the body temperature is below the set point?

    <p>Posterior hypothalamus</p> Signup and view all the answers

    What is the normal temperature range for the hypothalamus?

    <p>102 - 104 °F</p> Signup and view all the answers

    Which brain region is involved in thermoregulation and contains fenestrated capillaries allowing communication between the brain and the peripheral circulation?

    <p>Organum Vasculosum of the Lamina Terminalis (OVLT)</p> Signup and view all the answers

    What are the heat dissipating mechanisms when the body temperature is above the set point?

    <p>All of the above</p> Signup and view all the answers

    What is the main mechanism of heat loss in hot environments?

    <p>Evaporation</p> Signup and view all the answers

    What factors can decrease the efficiency of heat loss?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is a known cause of fever?

    <p>All of the above</p> Signup and view all the answers

    What is the most common genetic defect associated with hyperthermia?

    <p>RYR1</p> Signup and view all the answers

    Which patient groups are susceptible to hyperthermia?

    <p>All of the above</p> Signup and view all the answers

    What is a potential cause of hypothermia in urban medical settings?

    <p>Advanced age</p> Signup and view all the answers

    Which neurological condition can disrupt thermoregulation?

    <p>All of the above</p> Signup and view all the answers

    What is the primary aim of the research mentioned in the text?

    <p>To characterize regional heterogeneity of cutaneous microvascular control</p> Signup and view all the answers

    What health problems have been linked to climate change and increased heat waves?

    <p>All of the above</p> Signup and view all the answers

    How does high temperature exposure affect patients with neurodegenerative diseases?

    <p>It exacerbates excitotoxicity and oxidative stress</p> Signup and view all the answers

    What are some potential mechanisms involved in the damage caused by neurological issues?

    <p>All of the above</p> Signup and view all the answers

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