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What event causes the pulmonic valve to open?

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What event causes the pulmonic valve to open? - PowerPoint PPT Presentation


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What event causes the pulmonic valve to open?. The P wave An increase in the pressure within the right ventricle “Lubb-dupp” Contraction of the chordae tendineae. 0% 0% 0% 0%. What are the ventricles “doing” during atrial contraction?. Pumping blood into the great vessels

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what event causes the pulmonic valve to open
What event causes the pulmonic valve to open?
  • The P wave
  • An increase in the pressure within the right ventricle
  • “Lubb-dupp”
  • Contraction of the chordae tendineae

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what are the ventricles doing during atrial contraction
What are the ventricles “doing” during atrial contraction?
  • Pumping blood into the great vessels
  • Closing their AV valves
  • relaxing
  • Opening their semilunar valves

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systole and diastole describe the function of the
Systole and diastole describe the function of the

Pericardium

SA node

Myocardium

mediastinum

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during atrial systole the
During atrial systole, the
  • AV valves are closed
  • Ventricles are relaxed
  • Ventricles are in systole
  • Semilunar valves open

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what happens during ventricular diastole
What happens during ventricular diastole?
  • The ventricles are filling with blood
  • All semilunar valves are open
  • Both AV valves are closed
  • Blood is pumped to the lungs and systemic circulation

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with which of the following is lubb dupp associated with
With which of the following is “lubb-dupp” associated with?
  • Myocardial contraction
  • Ventricular depolarization
  • Closing of the heart valves
  • Diffusion of oxygen from lungs to the blood in the pulmonary capillaries

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which of the following supplies oxygenated blood to the heart muscle
Which of the following supplies oxygenated blood to the heart muscle?
  • Coronary arteries
  • Pulmonary arteries
  • Pulmonary veins
  • Cardiac veins

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where does the cardiac action potential cardiac impulse originate
Where does the cardiac action potential ( cardiac impulse) originate?
  • AV node
  • Purkinje fibers
  • Ectopic focus
  • SA node

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what are the conducting fibers that rapidly spread the electrical signal throughout the ventricle
What are the conducting fibers that rapidly spread the electrical signal throughout the ventricle?
  • Bundle of His
  • Purkinje fibers
  • SA node
  • AV node

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which of the following must precede ventricular contraction
Which of the following must precede ventricular contraction?
  • Ventricular relaxation
  • “Lubb-dupp”
  • Ventricular depolarization
  • Closing of the AV valves

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during ventricular contraction the
During ventricular contraction, the
  • AV valves close in response to intraventricular pressure
  • ECG is displaying the T wave
  • Semilunar valves close, causing S1 or “dupp”
  • ECG is displaying the P-R interval

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