MCGRAW HILL PRACTICE EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS GRADED A+
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Module
MCGRAW HILL
Institution
MCGRAW HILL
MCGRAW HILL PRACTICE EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS GRADED A+
The steps of the cardiac cycle sequence is? - Answer-Isovolumic contraction,ejection, isovolumic relaxation,passive ventricular filling, active ventricular filling
The beginning of ventricular systole is when the blo...
MCGRAW HILL PRACTICE EXAM
QUESTIONS WITH CORRECT
DETAILED ANSWERS GRADED A+
The steps of the cardiac cycle sequence is? - Answer-Isovolumic contraction,ejection,
isovolumic relaxation,passive ventricular filling, active ventricular filling
The beginning of ventricular systole is when the blood flowing back toward the relaxed
ventricles causes semilunar valves to close. True or false - Answer-False
In the heart the action potentials originates in the ? - Answer-Sinoatrial nodes
The sequence of travel by an action potential through the heart is? - Answer-Sinoatrial
node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers
Which is true about the heart conduction system? - Answer-Action potentials pass
slowly through the atrioventricular node
In the ventricles , the action potential travels along the Interventricular septum to the
apex of the heart, where it spreads superiorly along the ventricular walls . True or false -
Answer-True
Action potential are carried by the Purkinje fibers from the bundle branches to the
ventricular walls. True or false - Answer-True
During what phase of the cardiac cycle does aortic pressure reach its maximum? -
Answer-Ventricular ejection
During which complete phase of the cardiac cycle do the atria both relax and contract? -
Answer-Ventricular filling
In a cardiac muscle cell, the membrane potential increases rapidly ? - Answer-When
sodium gates open and sodium diffuses into the cardiac muscle fiber.
In a cardiac muscle cell , the membrane potential decreases rapidly ? - Answer-When
the potassium gates open and potassium diffuses out of the cardiac muscle fiber.
True or false. An action potential in a cardiac muscle fiber is identical to an action
potential in a skeletal muscle fiber - Answer-False
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