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5 Written questions

5 Matching questions

  1. Muscarinic receptor activation causes ___ in the CV system.
  2. In working myoctes, phase 2 of AP is plateau caused by ___.
  3. Incr afterload causes ___ SV. It is manifest as incr aortic pres
  4. In nodal pacing myocytes, phase 0 of AP is upstroke caused by ___
  5. PS vagal innervation uses the NT ___ on ___ receptors.
  1. a ACh, muscarinic
  2. b • incr Ca2+ conductance- inward
    • note that this is different; I(Na) in working myocytes
  3. c decr
  4. d • transient incr I(Ca2+)- inward
    • incr K+ out
  5. e • neg chronotropy
    • neg dromotropy
    • decr atrial inotropy

5 Multiple choice questions

  1. vagal
  2. I(Na)
  3. incr dev't tension
  4. • positive chronotropy
    • pos dromotropy
    • pos inotropy
  5. repol of memb potential in preceding AP.

5 True/False questions

  1. PS (ACh) via muscarinic receptors decr atrial contractility by ___.• neg chronotropy
    • neg dromotropy
    • decr atrial inotropy

          

  2. In nodal pacing myocytes, phase 2 of AP is ___.absent

          

  3. ___ is the NT that acts on beta-1 receptorsrepol of memb potential in preceding AP.

          

  4. In nodal pacing myocytes, phase 4 is slow repol (diastolic depol) caused by ___.• I(f)- inward Na+

          

  5. Neg dromotropy reduces AV nodal conduction velocity by ___• decr inward Ca2+ current
    • incr outward K+ current