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5 Written questions

5 Matching questions

  1. Digitalis has a pos inotropic effect. It inhibits ___ on the myocardial cell membrane.
  2. Parasympathetic ___ innervation is found in the SA, artia, and AV.
  3. Incr contractility cause ___ SV.
  4. In nodal pacing myocytes, phase 2 of AP is ___.
  5. Norepi incr inward Ca2+ during plateau via beta-1 receptors. It also incr SR Ca2+ pump activity by ___, which incr Ca2+ in SR.
  1. a Na+, K+ -ATPase (causing incr [Na+](intracel))
  2. b absent
  3. c incr
  4. d phosphorylation of phospholamban
  5. e vagal

5 Multiple choice questions

  1. incr
  2. Norepi
  3. • neg chronotropy
    • neg dromotropy
    • decr atrial inotropy
  4. decr rt of phase 4 depol in pacemaker cells
  5. absent

5 True/False questions

  1. Alpha-1 receptor activation causes ___ In the CV, splanchnic, and skeletal vascular smooth muscle constriction


  2. Neg dromotropy reduces AV nodal conduction velocity by ___decr rt of phase 4 depol in pacemaker cells


  3. PS vagal innervation uses the NT ___ on ___ receptors.Norepi


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


  5. In working myoctes, phase 2 of AP is plateau caused by ___.• transient incr I(Ca2+)- inward
    • incr K+ out


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