Cardio quiz

• which layer of the heart allows it to act as a pump?

  myocardium
• which sling-like structure supports the heart?

  pericardium
• What is the hardest working cardiac chamber and therefore has the thickest myocardium?

  Left ventricle
• The right ventricle pumps blood to the

  pulmonary artery
• A vessel that carries blood from the pulmonary capillaries to the left atrium is the

  pulmonary veins
• The aorta receives blood from the

  left ventricle
• Which of the following structures "sees" unoxygenated blood?

  Pulmonary Artery
• Which of the following "sees" oxygenated blood?

  Pulmonary veins
• Chordae Tendineae are NOT associated with this valve?

  aortic
• With which of the following is the "lubb-dupp" associated?

  closing of the heart valves
• Which of the following supplies oxygenated blood to the heart muscles?

  coronary arteries
• Where does the cardiac action potential (cardiac impulse) normally originate?

  SA node
• The pacemaker of the heart is located in the upper wall of the

  right atrium
• referring to the ECG, the P wave represents

  atrial depolarization
• referring to the ECG, the QRS complex represents ventricular

  depolarization
• Which structure connects the cusps of the AV valves to the ventricles?

  chordae tendineae
• What are the conducting fibers that rapidly spread the electrical signal throughout the ventricles?

  purkinje fibers
• Which of the following is least related to the mitral valve?

  semilunar
• All of the following are electrical terms except

  sarcomere
• Which of the following must precede ventricular contraction?

  ventricular depolarization
• Which of the following SEMILUNAR valves "sees" oxygenated blood?

  aortic
• The correct sequence is : blood flows from the right atrium to the right ventricle to the pulmonary artery to the

  pulmonary capillaries
• What event causes the pulmonic valve to open?

  an increase in the pressure within the right ventricle
• which layer of the heart has actin, myosin, and intercalated discs?

  myocardium
• the epicardium is a layer of the

  pericardium
• The mitral and bicuspid valves

  are the same valves
• The pulmonic and aortic valves

  are semilunar valves
• The correct sequence is : blood flows from the pulmonary capillaries to the pulmonary veins to the left atrium to the left ventricle to the

  aorta
• The atrioventricular node (AV node)

  delays the electrical signal coming from the atria into the ventricles
• The purpose of this structure is to delay the spread of the signal from the atrium to the ventricles.

  AV node
• Which of the following is an electrical event?

  depolarization
• Which of the following is a result of ventricular contraction?

  blood is pumped into the pulmonary artery and the aorta
• under what condition is blood most likely to flow backward (from the left ventricle back into the left atrium)

  an insufficient mitral valve
• What are the ventricles "doing" during atrial contraction?

  relaxing
• the purkinje fibers

  conduct electrical signals throughout the ventricles
• Which cavity first receives unoxygenated blood from the vena cava?

  right atrium
• What is the name of the valve that prevents backflow of blood into the right atrium when the right ventricle contracts?

  tricuspid
• What is the cause of the heart sounds, "lubb-dupp"?

  closing of the heart valves
• Which of the following is NOT true of the heart?

  the pericardium is composed of actin and myosin
• Which of the following is LEAST descriptive of the myocardium?

  thicker in the left atrium than the right ventricle