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.

Q: Describe the autonomic innervation of the heart.

A: The heart is innervated by sympathetic and parasympathetic fibres from the autonomic branch of the…

Q: Describe the heart’s pacemaker and internal electrical conduction system.

A: The heart can be defined as the muscular organ which is about the size of a fist and is situated…

Q: Explain how the heart is a double pump and why this is significant

A: Human heart is situated in the space of thoracic cavity present between two lungs.

Q: Structures on the anterior side Function/significance Anterior interventricular sulcus…

A: all the given stuctures are related to the anatomy of heart wich can be explain as follows-

Q: Describe the structure of the heart and its components.

A: HEART: It is a muscular organ. It is the foundation of the cardiovascular system. Size: About a…

Q: Describe the pathway of electrical conduction of the heart, starting with the SA node. How does…

A: In the heart, the contraction of the heart muscle is promoted by the electrical conduction system…

Q: Describe the cardiac center and innervation of the heart.

A: The heart refers to an organ that pumps and provides blood supply to the body via the blood vessels.…

Q: Describe the causes of the P, QRS, and T waves of an ECG, and indicate at which point in the cardiac…

A: The cardiac cycle represents the event that occurs after the ending of one heartbeat to the start of…

Q: Define each of the following external features of the heart: auricle, coronary sulcus, anterior…

A: The heart is an organ that pumps blood through the arteries. The pumped blood carries oxygen…

Q: Which of the following correctly ranks pressures during isovolumetric contraction of a normal…

A: A normal cardiac cycle is characterised by revenant atrial and cavity contractions and…

Q: Describe the effects of sympathetic and parasympathetic neuronal stimulation on heart rate.

A: the effects of sympathetic and parasympathetic neuronal stimulation on heart rate are:

Q: List other factors that affect heart rate

A: Heart rate is the rate at which heart beats per minute. The average adult heart rate is 72 beats per…

Q: Discuss the intrinsic conduction system of the heart including the sinoatrial node, atrioventricular…

A: The circulatory system consists of three systems that work together; the heart (cardiovascular),…

Q: List the normal value for resting heart rate

A: The human circulatory system or the blood vascular system consists of a muscular chambered heart, a…

Q: What is the relation of Electrocardiogram components with Heart function. Please briefly explain at…

A: Electrocardiogram (ECG) is also known as EKG is a device for recording the electrical activity of…

Q: Explain how and why the heart changes in old age?

A: Heart: The heart is a muscular organ about the size of a fist. It is located behind breast bone and…

Q: why a leaking heart valve may cause heart damage over time?

A: Leaky heart valve can affect any of the four heart valves: 1)Aortic valve ( left ventricle and…

Q: Explain why the SA node normally paces the heart.

A: In human heart, small groups of specialised neuromuscular cells are present within the myocardium.…

Q: Considering the function of the heart, why is it important that the myocardium cannot be tetanized?

A: Tetanized state is a sustained muscle contraction. This happens because muscle’s motor unit is…

Q: What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning…

A: Introduction Significance of atrioventricular node and atrioventricular bundle in the functioning of…

Q: An individual presents with cardiac tamponade.  Their heart would be the most efficient in pumping…

A: cardiac tamponade is a medical condition where there is build up of fuilds in the pericardial sacs.…

Q: Name a structure that is on the ventural side of the heart located more laterally within the axial…

A: The heart is a muscular organ that plays a key role in circulating or pumping blood and also…

Q: Name the major branches of the heart.

A: The heart is the blood-pumping organ in the animals. It pumps blood via the blood vessels of the…

Q: What areas of the heart are deprived of blood when there is a blockage in the posterior…

A: Posterior Interventricular artery is a coronary artery, which is also known as the Posterior…

Q: Identify in the picture all the following: 1. Right Auricle (atrium), -2. left Auricle (atrium),…

A:

Q: Explain when and how the two sounds of heart are produced?

A: The heart is a muscular organ, which pumps blood throughout the body. It is located in the middle…

Q: During heart development, the primary outcome of cardiac looping is Fusion of the aortic sac vessels…

A: Heart development occur in various stages.

Q: Occasionally an ectopic pacemaker will develop in part of the conducting system of the heart. What…

A: An ectopic pacemaker is a collection of excitable cells located outside of the heart's typically…

Q: Fill in the blank:  During ventricular contraction, the A-V valves (tricuspid and bicuspid valves)…

A: Cardiac cycle is the event that is initiated by spontaneous generation of an action potential in the…

Q: True or false:  Impulses through the conduction system of the heart follow the ordered path SA…

A: INTRODUCTION SA node causes the atrial muscle contraction. From here the signal travels to AV node…

Q: Pacemaker cells are concentrated primarily in two specific regions of the myocardium. ventricle…

A: Heart is a muscular pumping structure and is vital part of circulatory system which helps in sending…

Q: State the function of the following parts of the heart  1. Inferior and superior vena cava  2.…

A: The heart is a kind of pumping organ which is present in the left side of the chest. it is in the…

Q: High-pressure environments have a profound effect on the cardiopulmonary system. What are they?

A: Cardiopulmonary is a combination of two words that is cardio and pulmonary. Cardio means heart and…

Q: Identify/describe the four valves of the heart. Describe its functions.

A: The heart:It is blood pumping organ. It consists of four chambers: two upper chambers or atria and…

Q: Explain two causes of left-sided heart failure, one relatedto the heart and one systemic

A: Heart failure is sometimes associated with pulmonary or peripheral congestion and characterized with…

Q: Describe the functional differences in the effects of the sympathetic and parasympathetic divisions…

A: The nervous system is an organ system in the body that can be divided into the central nervous…

Q: Indicate on the diagram where the atrioventricular and semilunar valves would be found.

A: Heart is special organ of body which helps in pumping of blood to various organs and tissues of the…

Q: Describe the general overall shape of the left and right cavities of the ventricles as observed in a…

A: The heart is the major organ of the circulatory system that pumps blood to the parts of the body. It…

Q: Describe the spread of the action potential through the heart’s conduction system.

A: A transient shift in voltage (membrane potential) across the cell membrane of heart cells is…