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5 Written questions

5 Matching questions

  1. In other words, Frank-Starling describes a proportional relationship between ___
  2. Beta-1 receptor activation causes ___ in the CV system.
  3. Digitalis has a pos inotropic effect. It inhibits ___ on the myocardial cell membrane.
  4. In nodal pacing myocytes, phase 3 of AP is repolarization caused by ___.
  5. Digitalis has a pos inotropic effect. It causes incr [Ca2+](intracel) by ___.
  1. a diminishing Na+ gradient, which diminishes Na+-Ca2+ exchange
  2. b Na+, K+ -ATPase (causing incr [Na+](intracel))
  3. c EDV/RAP and CO/SV
  4. d • positive chronotropy
    • pos dromotropy
    • pos inotropy
  5. e • incr K+ conductance- outward

5 Multiple choice questions

  1. • incr Ca2+ conductance- inward
    • note that this is different; I(Na) in working myocytes
  2. decr I(f)- the inward Na+
  3. I(K1)
  4. repol of memb potential in preceding AP.
  5. • neg chronotropy
    • neg dromotropy
    • decr atrial inotropy

5 True/False questions

  1. In working myoctes, phase 3 of AP is rapid repol caused by ___.• 1º incr K+ out
    • decr Ca2+ in

          

  2. Parasympathetic ___ innervation is found in the SA, artia, and AV.ACh, muscarinic

          

  3. In working myoctes, phase 0 of AP is rapid depol caused by ___I(Na)

          

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

          

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

          

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