Although not considered the primary pacemaker of the heart, the atrioventricular node can indeed be considered...

Although not considered the primary pacemaker of the heart, the atrioventricular node can indeed be considered as playing SOME role in setting the rhythm of the heart (kind of a secondary pacemaker). Explain how/why.

Solutions

Expert Solution

The atrioventricular node (AVN) is present at the atrio-ventricular aperture and it conducts the signal given to it by the primary pacemaker i.e., the sinoatrial node. The AVN further branches off to form the purkinjee fibres which innervate the heart cell and pass on the electrical stimulus passed to it by the SAN. This AVN can be considered as analogous to the brain and the spinal cord. The brain gives the signal and the spinal cord transmits it. Likewise the electrical stimulus is given by the SAN and it is relayed by the AVN to all parts of the heart. If the AVN is absent then the simultaneous beat of the heart would be impossible as it is the centre that coordinates the beating of the heart simultaneously due to properly conveying the electrical stimulus from the SAN node. Hence the AVN node maynot be the primary pacemaker but it does have a role in setting the rhythm of the heart and hence acts as a secondary pacemaker.

If you have any query kindly comment before giving thumbs up. Thank you.

gladiator answered 1 year ago

Next > < Previous

Related Solutions

QUESTION 33 True or false? The sinoatrial node can be described as a pacemaker. True False

23. The separate effects of sympathetic and parasympathetic innervation of the pacemaker region of the heart can...

23. The separate effects of sympathetic and parasympathetic innervation of the pacemaker region of the heart can best be described as _______. a) synergistic b) complementary c) cooperative d) antagonistic e) none of these 24. A decrease in body temperature is sensed by the ________ which communicates with the ________ of the brainstem to __________ output to the sympathetic nervous system. a) cerebral cortex; pons; increase b) hypothalamus; cardiac center; decrease c) thalamus; basal nuclei; increase d) hypothalamus; vasomotor center; increase e) basal nuclei; pons;decrease 29. When Robin kicks...

Define Medical Terminology Afterload Atrioventricular node (AV node) Automaticity Autoregulation Capillary Cardiac cycle Cardiac output Coronary...

Define Medical Terminology Afterload Atrioventricular node (AV node) Automaticity Autoregulation Capillary Cardiac cycle Cardiac output Coronary artery Depolarization Diastole Diastolic blood pressure Ejection fraction Epinephrine Inferior vena cava (pl., cavae) Inotropic agents Laplace law Left coronary artery (LCA) Left heart Left ventricle Lymph

Although it is difficult to believe in the twenty-first century, there are indeed countries with large...

Although it is difficult to believe in the twenty-first century, there are indeed countries with large businesses that have a cash-only policy. Cuba is one of them, and Armenia used to be one. Credit cards are either not accepted or are risky to use. Looking at this issue from the point of view of the country, do you think that this policy is a help or a hindrance to the economic strength of their country? Would someone from the United...

1) If Lucy had all of the pacemaker cells in her AV node die off, what...

1) If Lucy had all of the pacemaker cells in her AV node die off, what would happen? A. Her heart would still beat at a normal rate as if nothing happened. B. Her heart would stop beating and she would die. C. Her heart rate would be controlled by the pacemaker cells of the Bundle of His . Her heart rate would start depolarizing from the apex. D. Her heart would still beat, but the ventricles would contract right...

Which group of pacemaker cells is responsible for setting the heart rate in a healthy patient?...

Which group of pacemaker cells is responsible for setting the heart rate in a healthy patient? Write a flow diagram (eg: structure A --> structure B --> structure C, etc.) to describe the path that an action potential would take as it makes its way through the electrical conduction system of the heart, being sure to name all structures. What structure enables action potentials to directly spread between neighbouring cardiomyocytes? Be specific.

Although US can be considered as an example of capitalism, discuss if the United States still...

Although US can be considered as an example of capitalism, discuss if the United States still fits the model. Provide examples to support statements.

Among 9976 cases of heart pacemaker malfunctions, 465 were found to be caused by firmware ,...

Among 9976 cases of heart pacemaker malfunctions, 465 were found to be caused by firmware , which is software,programmed into the device. If the firmware is tested in 3 different pacemakers randomly selected from this batch of 9976 and the entire batch is accepted if there are no failures, what is the probability that the firmware in the entire batch will be accepted? Is this procedure likely to result in the entire batch being accepted?

1. Accounting information can be considered the heart of business. Decision making is never without accurate...

1. Accounting information can be considered the heart of business. Decision making is never without accurate and reliable information. The users of accounting information can be internal and external. They use accounting information with different goals. Explain how basic knowledge of accounting can benefits the managers, executives, or the entrepreneur.

In a double linked chain, each node can point to the previous node as well as...

In a double linked chain, each node can point to the previous node as well as the next node. Illustrate and list the steps necessary to add a node to the end of the doubly linked chain.

Subjects