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Home Q & A Board Biology-Related Homework Help Medicine Emergency Medical Care
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Arroyo21 Arroyo21
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6 years ago
Which of the following best explains the mechanism called irritability?
 
  A) The ventricles repolarize before they are ready.
  B) The normal pacemaker slows down and gives up control.
  C) A lower pacemaker site speeds up to take control of the heart.
  D) The normal pacemaker changes its inherent rate.

Question 2

Which cardiac cells are responsible for initiating and conducting pacemaker impulses?
 
  A) Motor cells
  B) Mechanical cells
  C) Electrical cells
  D) Atrioventricular cells

Question 3

When stimulated, the ________ branch of the nervous system increases heart rate, AV conduction, and irritability.
 
  A) parasympathetic
  B) sympathetic
  C) pacemaker
  D) inherent

Question 4

Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve.
 
  A) vagus
  B) coronary
  C) aortic
  D) pericardial
Textbook 
Basic Arrhythmias

Basic Arrhythmias


Edition: 8th
Author:
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