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