heart

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  • Created by: niss81
  • Created on: 01-09-20 06:18

1. which of the following is a function of a valve?

  • regulates the amount of oxygen bound to hemoglobin
  • regulates the direction of the flow of blood through the heart
  • directs the movement of the cardiac impulse
  • regulates heart rate
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2. which cavity first receives unoxygenated blood from the vena cava?

  • left atrium
  • left ventricle
  • right atrium
  • right ventricle

3. sympathetic stimulation to the heart:

  • decreases cardiac output
  • decreases stroke volume
  • increases heart rate
  • causes bradycardia

4. vagal stimulation on the heart:

  • causes tachycardia
  • slows the heart rate
  • increases the force of myocardial contraction
  • increases the amount of blood that flows into the heart from the vena cava

5. the atrioventricular node (AV node):

  • has a rate that is normally faster than the SA node
  • is located in the upper part of the right atrium
  • delays the electrical signal coming from the atria into the ventricles
  • is the pacemaker of the heart
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