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5 Written questions

5 Matching questions

  1. Norepi incr inward Ca2+ during plateau via beta-1 receptors. It also incr SR Ca2+ pump activity by ___, which incr Ca2+ in SR.
  2. In working myoctes, phase 2 of AP is plateau caused by ___.
  3. Decr phase 4 rt in pacemaker cells is caused by ___
  4. Muscarinic receptor activation causes ___ in the CV system.
  5. Digitalis has a pos inotropic effect. It causes incr [Ca2+](intracel) by ___.
  1. a phosphorylation of phospholamban
  2. b • neg chronotropy
    • neg dromotropy
    • decr atrial inotropy
  3. c diminishing Na+ gradient, which diminishes Na+-Ca2+ exchange
  4. d • transient incr I(Ca2+)- inward
    • incr K+ out
  5. e decr I(f)- the inward Na+

5 Multiple choice questions

  1. Na+, K+ -ATPase (causing incr [Na+](intracel))
  2. vagal
  3. • positive chronotropy
    • pos dromotropy
    • pos inotropy
  4. decr inward Ca2+ current in plateau
  5. • I(f)- inward Na+

5 True/False questions

  1. In other words, Frank-Starling describes a proportional relationship between ___• decr inward Ca2+ current
    • incr outward K+ current


  2. In nodal pacing myocytes, phase 0 of AP is upstroke caused by ___• incr K+ conductance- outward


  3. Incr preload causes ___ SV. It is manifest as incr EDV.decr


  4. Neg chronotropy reduces HR by ___.repol of memb potential in preceding AP.


  5. In nodal pacing myocytes, phase 3 of AP is repolarization caused by ___.• incr K+ conductance- outward