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18 Cards in this Set
- Front
- Back
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The right side of the heart pumps blood through vessels to the lungs and back to the left side of the heart through the __________ circulation.
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Pulmonary Circulation
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The left side of the heart pumps blood through the __________ circulation, which delivers oxygen and nutrients to all the remaining tissues of the body.
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Systemic Circulation
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Which of the following is a CORRECT order of blood flow through the heart?1 - right atrium2 - left atrium3 - right ventricle4 - left ventricle5 - vena cava6 - pulmonary artery7 - pulmonary vein8 - tricuspid AV valve9 - bicuspid (mitral) AV valve10 - pulmonary valve11 - aortic valve12 - aorta
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5, 1, 8, 3, 10, 6, 7, 2, 9, 4, 11, 12
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When blood is flowing out of the left ventricle the bicuspid valve is __________ and the aortic semilunarvalve is __________.
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closed; open
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When blood is flowing into the left ventricle the bicuspid valve is __________ and the aorticsemilunar valve is __________.
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open; closed
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What happens in each 5 phases of cardiac muscle?
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1. Depolarization- Voltage gated sodium channels open2. Initial Re-polarization- Sodium channels close and loss of potassium.3. Plateau- Calcium channels open and calcium rushes in and neutralizes the effect of outgoing potassium.4. Final Re-polarization- calcium channels close and loss of potassium continues5. RMP- Cell returns to resting membrane potential
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During the depolarization phase of cardiac muscle
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voltage-gated sodium channels open.
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During the early repolarization and plateau phases of cardiac muscle
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voltage-gate potassium channels open.
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During the final repolarization phase of cardiac muscle
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voltage-gated calcium channels are closed.
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During __________ all of the valves are closed as pressure builds in the ventricles.
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the period of isovolumetric contraction
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During __________ all of the valves are closed as ventricles begin diastole.
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the period of isovolumetric relaxation
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In the heart, an action potential originates in the
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sinoatrial node.
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The sequence of travel by an action potential through the heart is
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sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers.
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Which of the following is true concerning the heart conduction system?
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action potentials pass slowly through the atrioventricular node
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In the ventricles, the action potential travels along the interventricular septum to the apex of the heart, where it then spreads superiorly along the ventricle walls.
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True
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Action potentials are carried by the Purkinje fibers from the bundle branches to the ventricular walls.
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True
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The semilunar valves close during..
The atrioventricular valves open during ventricular diastole. |
ventricular diastole.
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https://quizlet.com/12719161/test-2-quizzes-flash-cards/
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jhn |
