FNS 29 Temperature Regulation

Card Set Information

Author:
zf2010
ID:
72165
Filename:
FNS 29 Temperature Regulation
Updated:
2011-03-10 21:23:25
Tags:
USUHS Temperature Regulation
Folders:

Description:
FNS 29 Temperature Regulation
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user zf2010 on FreezingBlue Flashcards. What would you like to do?


  1. What regions of the CNS are responsible for the regulation of body temp?
    • Hypothalamus
    • Spinal Cord
  2. Which thermoreceptors are more numerous?
    Cold receptors (3-10x)
  3. Cold Receptors:
    Fiber type?
    Maximum a.p. range?
    • Small myelinated fibers
    • 23-28 C
  4. Warm Receptors:
    Fiber type?
    Maximum a.p. range?
    • Unmyelinated C fibers
    • 38-43 C
  5. What types of fibers sense temperature pain?
    • Cold-pain receptors (15 C)
    • Heat-pain receptors (45 C)
  6. What are the methods of increasing heat production and conserving heat?
    • Posterior hypothalamus - control
    • Shivering
    • Voluntary exercise
    • Peripheral vasoconstriction
    • Piloerection
    • Sympathetic activation - increases cellular metabolism
    • Synth of thyroid hormone - increases cellular metabolism over several weeks
  7. What is a set point?
    • Core temperature where no thermoregulatory effector activity required
    • Changed by thermoreceptor input
  8. What region in the brain is responsible for increasing heat dissipation?
    • Anterior hypothalamus
    • Lesions result in hyperthermia
  9. What are the methods for increasing heat dissipation?
    • Vasodilation
    • Cholinergic activation of sweat glands
    • Inhibition of heat production
    • Behavioral modifications (clothing...)
  10. What causes a fever?
    • Pyrogens influence the hypothalamus by increasing prostaglandin synthesis
    • This elevates the thermal set point

What would you like to do?

Home > Flashcards > Print Preview