BIO 208: A&P - CARLA 13
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| Blood returning from the systemic circuit first enters the | Right atrium
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| Identify the factor that will increase cardiac output | increased parasympathetic stimulation
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| According to Starling's law of the heart, the cardiac output is directly related to | the venous return
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| As a result of the long refractory period, cardiac muscle cannot exhibit | tetany
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| In which situation would the stroke volume be the greatest? | when venous return is increased
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| Under conditions of hypercalcemia cardiac muscles become | extremely excitable
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| The cardioacceleratory center in the medulla oblongata activates what neurons? | sympathetic
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| Relaxation of the ventricles is called | ventricular diastole
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| The heart is innervated by? | both parasympathetic and sympathetic nerves
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| The volume of blood ejected from each ventricle during a contraction is called the | stroke volume
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| The P wave of the ECG corresponds to | atrial depolarization
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| The left ventricle pumps blood to | the systemic circuit
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| The function of an atrium is to | collect blood
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| The left and right pulmonary veins carry blood to the | heart
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| Which of the following is true regarding cardiac muscle? | Neither summation nor tetany can occur
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| The pacemaker cells of the heart are located in the | SA node
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| Depolarization of the ventricles is represented on an electrocardiogram by the | QRS complex
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| The first heart sound is heard when | the AV valves close.
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| Which of the following the refractory periods is longer? | cardiac muscle
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nke1992
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