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5 Written questions

5 Matching questions

  1. Incr contractility cause ___ SV.
  2. Incr afterload causes ___ SV. It is manifest as incr aortic pres
  3. In nodal pacing myocytes, phase 2 of AP is ___.
  4. Alpha-1 receptor activation causes ___ In the CV system.
  5. Beta-1 receptor activation causes ___ in the CV system.
  1. a skin, splanchnic, and skeletal vascular smooth muscle constriction
  2. b absent
  3. c decr
  4. d • positive chronotropy
    • pos dromotropy
    • pos inotropy
  5. e incr

5 Multiple choice questions

  1. vagal
  2. Na+, K+ -ATPase (causing incr [Na+](intracel))
  3. decr rt of phase 4 depol in pacemaker cells
  4. • incr Ca2+ conductance- inward
    • note that this is different; I(Na) in working myocytes
  5. • decr inward Ca2+ current
    • incr outward K+ current

5 True/False questions

  1. PS (ACh) via muscarinic receptors decr atrial contractility by ___.decr inward Ca2+ current in plateau


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


  3. In other words, Frank-Starling describes a proportional relationship between ___EDV/RAP and CO/SV


  4. ___ is the NT that acts on beta-1 receptorsNorepi


  5. Norepi incr inward Ca2+ during plateau via beta-1 receptors. It also incr SR Ca2+ pump activity by ___, which incr Ca2+ in SR.Norepi