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5 Written questions

5 Matching questions

  1. Parasympathetic ___ innervation is found in the SA, artia, and AV.
  2. Muscarinic receptor activation causes ___ in the CV system.
  3. In working myoctes, phase 3 of AP is rapid repol caused by ___.
  4. ___ is the NT that acts on beta-1 receptors
  5. Neg dromotropy reduces AV nodal conduction velocity by ___
  1. a • neg chronotropy
    • neg dromotropy
    • decr atrial inotropy
  2. b • decr inward Ca2+ current
    • incr outward K+ current
  3. c • 1º incr K+ out
    • decr Ca2+ in
  4. d vagal
  5. e Norepi

5 Multiple choice questions

  1. decr inward Ca2+ current in plateau
  2. incr
  3. Na+, K+ -ATPase (causing incr [Na+](intracel))
  4. EDV/RAP and CO/SV
  5. decr rt of phase 4 depol in pacemaker cells

5 True/False questions

  1. Decr phase 4 rt in pacemaker cells is caused by ___decr I(f)- the inward Na+


  2. In working myoctes, phase 1 of AP is initial repol caused by ___.• 1º incr K+ out
    • decr Ca2+ in


  3. Alpha-1 receptor activation causes ___ In the CV system.• positive chronotropy
    • pos dromotropy
    • pos inotropy


  4. In nodal pacing myocytes, phase 1 of AP is ___.absent


  5. According to the Frank-Starling principle, incr in EDV will cause an incr in ventricular fiber length, leading to ___incr dev't tension


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