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5 Written questions

5 Matching questions

  1. Hypothermia
  2. High Intracellular Ion Concentrations
  3. Fever (Pyrexia)
  4. Heat Loss from Skin
  5. Leeuwenhoek (1632-1723)
  1. a Dutch microscopist; observed and described red blood cells and spermatozoa; didn't publish his journals (weren't found until nearly 100 years later).
  2. b K⁺, amino acids, Mg, P
  3. c Condition due to cold weather or icy water. Core temperature < 91 °F. Leads to sleep, coma, and death.
  4. d Occurs in four ways: radiation, conduction, convection, and evaporation.
  5. e Protective mechanism caused by infection, trauma, brain tumor, drug reaction, etc. Fatal if core temperature reaches 108 °F (positive feedback loop starts: increased temp → increased metabolic rate → increased body heat → repeat) and 111-113 °F fatal.

5 Multiple choice questions

  1. Basic unit of physiological anatomy; comprised of one or more tissue types; has definite shape and function.
  2. Skin freezes. Areas susceptible: fingers, toes, ear lobes, and eyes. Ice crystals form in tissues impairing blood circulation, causing permanent damage, leading to gangrene following thawing.
  3. Prolonged heat exposure with high humidity. Body gains heat by radiation and convection while evaporative cooling is retarded. Can lead to convulsions, coma, and death.
  4. While blood is kept below adipose tissue, a poor conductor of heat, skin is {this}.
  5. Modern physiology dates from his research on the cardiovascular system; "On the Movement of the Heart and Blood in Animals"; blood recycled, pumped out of the heart via arteries which were somehow connected to veins and returned to the heart (capillaries weren't visible).

5 True/False questions

  1. Survivable Ambient Temperature RangeCold temperature → cold receptor...sensory fibers → primary motor center → bilateral tracts down brain stem → lateral column of spinal cord → anterior motor neuron → skeletal muscles → alternating contraction in muscles (~4 fold increase in heat production)


  2. NeurogliaTissue that surrounds and supports neurons in the central nervous system; support, protect, and nourish the neurons.


  3. Heat ExhaustionIncreased by thermogenesis: Shivering and Chemical.


  4. Hypothalamic Temperature Control (Hot)* Vasodilatation of dermal blood vessels and increased blood flow to the skin (8 fold reduction in heat)
    * Sweat (removes 10 times basal metabolic rate heat)
    * Heat production inhibited


  5. Phospholipid BilayerLow permeability to water-soluble substances (e.g. ions, glucose, and amino acids), but permeable to lipid-soluble substances (e.g. fatty acids, oxygen, and carbon dioxide).


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