Defect Abnormal SA node firing resulting in abnormally slow resting heart rate Abnormal SA node firing resulting in abnormally fast resting heart rate and abnormal ventricular depolarization Conduction through the AV node fails, resulting in complete dissociation of atrial and ventricular contractions Atrial muscle cells depolarize prematurely, followed by conduction through the AV node, which causes ventricular contraction Ventricular muscle cells depolarize independently, resulting in completely disorganized electrical activity Ett # 1 sec 1 mV Normal 3 لسلہ سلسل السلسل 2 P P P 5 sipiphyr

Defect Abnormal SA node firing resulting in abnormally slow resting heart rate Abnormal SA node firing resulting in abnormally fast resting heart rate and abnormal ventricular depolarization Conduction through the AV node fails, resulting in complete dissociation of atrial and ventricular contractions Atrial muscle cells depolarize prematurely, followed by conduction through the AV node, which causes ventricular contraction Ventricular muscle cells depolarize independently, resulting in completely disorganized electrical activity Ett # 1 sec 1 mV Normal 3 لسلہ سلسل السلسل 2 P P P 5 sipiphyr

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter9: Cardiac Physiology

Section: Chapter Questions

Problem 4RE

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Similar questions

Ventricular relaxation immediately follows ________. atrial depolarization ventricular repolarization ventricular depolarization atrial repolarization
The heart's internal pacemaker beats by: an internal implant that sends an electrical impulse through the heart the excitation of cardiac muscle cells at the sinoatrial node followed by the atrioventricular node the excitation of cardiac muscle cells at the atrioventricular node followed by the sinoatrial node the action of the sinus
Clusters of neurons in the medulla oblongata that regulate blood pressure are known collectively as ________. baroreceptors angioreceptors the cardiomotor mechanism the cardiovascular center
The heartbeat includes: a. the systole when the heart relaxes and fills. b. the diastole when the heart contracts and empties. c. pressure that causes the AV valves to open, filling the ventricles. d. rising pressure in the ventricles to open the AV valves and close the SL valves. e. the lub sound when the SL valves open and the dub sound when the AV valves close.
The two tubes that eventually fuse to form the heart are referred to as the ________. primitive heart tubes endocardial tubes cardiogenic region cardiogenic tubes
High blood pressure would be a result of ___________ . a high cardiac output and high peripheral resistance a high cardiac output and low peripheral resistance a low cardiac output and high peripheral resistance a low cardiac output and low peripheral resistance
The cardiac cycle consists of a distinct relaxation and contraction phase. Which term is typically used to refer ventricular contraction while no blood is being ejected? systole diastole quiescent isovolumic contraction
The ________ layer secretes chemicals that help to regulate ionic environments and strength of contraction and serve as powerful vasoconstrictors. pericardial sac endocardium myocardium epicardium
Contraction of _______ drives the flow of blood through the aorta and pulmonary arteries. a. atria b. veins c. arterioles d. Ventricles
The coronary arteries branch off of the ________. aortic valve ascending aorta aortic arch thoracic aorta