Exam 7: The Peripheral Nervous System: Efferent Division

Match the pressure relationships, labelled e., with the times in question. (Options may be used more than once or not at all.)a. through a.aortic pressure > ventricular pressure > atrial pressure b.ventricular pressure > aortic pressure > atrial pressure c.aortic pressure > atrial pressure > ventricular pressure d.ventricular pressure > atrial pressure > aortic pressure e.atrial pressure > ventricular pressure > aortic pressure -when ventricular ejection is occurring

Match the EKG features, labelled f., with their correct characteristic.a. through a.P wave b.QRS complex c.T wave d.PR interval e.TP interval f.ST segment -atrial depolarization

Match the effects with sympathetic or parasympathetic stimulation (or neither) of the heart. (Options may be used more than once or not at all.) a.effect caused by sympathetic stimulation b.effect caused by parasympathetic stimulation c.not brought about by either sympathetic or parasympathetic stimulation -decreases the rate of depolarization to threshold of the SA node

Which of these statements correctly describes extrasystole of the heart?

Match the anatomical structures, labelled e., with the heart characteristics. (Options may be used more than once or not at all.)a. through a.tricuspid valve b.myocardium c.aortic semilunar valve d.AV node e.sinoatrial node -contains Purkinje

The heart utilizes glucose almost exclusively for energy production.

If stroke volume is 80 mL and the heart rate is 70 beats per minute, what is the cardiac output?

During exercise, the cardiac output ____________________.

An increase in cardiac sympathetic activity ____________________ the rate of depolarization of the SA node.

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) a.stroke volume b.end-diastolic volume c.cardiac output d.heart rate e.end-systolic volume f.sympathetic activity -The maximum volume of blood that the ventricle contains after filling is complete is the _____.

The first heart sound signals the onset of ventricular systole.

What does the QRS complex represent?

Match the factor involved in the initiation and spread of cardiac excitation, labelled d. with the description. (Options may be used more than once or not at all.)a. through a.SA node b.AV node c.bundle of His and Purkinje system d.gap junction -rapidly conducts the impulse down the ventricular septum and throughout much of the ventricular musculature

What component of the cardiac conduction system distributes electrical signals through the papillary muscles directly?

All of the blood within the ventricles is ejected during ventricular systole.

Which of these molecule(s) induces vasodilation of coronary arteries?

Match the pressure relationships, labelled e., with the times in question. (Options may be used more than once or not at all.)a. through a.aortic pressure > ventricular pressure > atrial pressure b.ventricular pressure > aortic pressure > atrial pressure c.aortic pressure > atrial pressure > ventricular pressure d.ventricular pressure > atrial pressure > aortic pressure e.atrial pressure > ventricular pressure > aortic pressure -when the aortic valve closes

Which of these actions happens during heart failure?

Which of the following is the function of the ventricular conduction system of the heart?

Which of the following is a compensatory mechanism that comes into play in order to maintain the cardiac output for the failing heart?