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: Pacemaker in heart is?
A: The tissues of the cardiac muscles responsible for the origin and conduction of cardiac impulse…
Q: What roles does Ca2+ play in the myocardium ?
A: Calcium is usually found in a variety of foods, including fishes, some vegetables, dairy products…
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: which of the following is the pacemaker of the heart?
A: Heart Heart is the pumping organ of animals it is made up of cardiac muscles. The heart of human…
Q: The endocardium of the heart is composed of THREE layers. Describe their structure and also explain…
A: The main organ of the circulatory system is the heart. It has four-chamber that is responsible for…
Q: All of the following are part of the cardiac conduction system except the: a. chordae tendineae b.…
A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…
Q: compare and contrast the difference between, right, left, and biventricular heart failure. Explain…
A: Heart failure occurs when the body is unable to pump enough blood to supply the required nutrients…
Q: Endocarditis is an inflammation of which portion of the heart? a. pericardium b. endocardium c.…
A: Heart is an organ that pumps blood and is originated from mesodermal tissue. Heart is exclusively…
Q: Which of the following is NOT a population of pacemaker cells in the heart? a. papillary muscles b.…
A: D) purkinje fibre 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: Name the double layered membranous covering of the heart.
A: Heart is an essential pumping organ of the body which is a part of cardiovascular system. It has 2…
Q: Sino-atrial node is called the pacemaker of our heart. Why?
A: The SA (sino-atrial) node is a neuron’s specialized bundle that is located in the upper part of…
Q: How can angina be distinguished from myocardial infarction?
A: Each and every cell of the body requires oxygen and nutrients to carry out metabolic processes.…
Q: Inflammation of the pericardium can lead to a condition called pericardial effusion, in which fluids…
A: The heart is a conical hollow organ which consists of four chambers. Two auricles and two ventricles…
Q: From what sources does blood flow into the upper and lower chambers of the heart? What are the…
A: Heart pumps blood through a system of blood vessels, called the circulatory system. The heart is a…
Q: Which of the four chambers of the human heart has the thickest muscular walls?
A: The cardiovascular system consists of the heart, blood, and blood vessels and is also known as the…
Q: Heart beat/rate is controlled by these groups of cells on the heart. a-SA node b-AV node c-nerve…
A: Heart rate is the speed of the heartbeat measured by the number of contractions of the heart per…
Q: In the initial stages of ventricular fibrillation (during which the heart produces no functional…
A: The heart is the pumping organ that is responsible for circulating the blood to different parts of…
Q: The upper chambers of the heart that receive blood are called ___.
A: The cardiovascular system of the human body is made up of the heart, blood, and blood vessels that…
Q: What are the three populations of cells in the heart that can act as pacemakers? How do they differ?
A: The heart is a muscular organ and is involved in the pumping of blood via blood vessels. The blood…
Q: True or false the veins carry blood from the heart to the rest of the body?
A:
Q: They carry oxeganated blood away from the heart,while capillaries?
A: Blood vessels referred to as the tubular channels from which blood get transported all over the…
Q: During the systolic phase of the cardiac cycle, the heart is
A: The cardiovascular system, also referred to as the circulatory system or the system, is an organ…
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 part of the myocardium is nonfunctionalfollowing myocardial infarction.
A: The heart supplies blood to different parts of the body. Blood carries oxygen and nutrients to the…
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: Explain the Frank-Starling law of the heart
A: The heart receives the blood through atrial chambers and it pumps down to the ventricles and thereby…
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 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: Explain the pathway of the conductions system in the Heart?don't copy from google
A: The cardiovascular system of the humans consists of organs like heart and blood vessels. The primary…
Q: Mitral valve prolapse is a disease where the valve between the left atrium and left ventricle…
A: The mitral valve permits blood to flow from the left atrium into the left ventricle, but not in the…
Q: The atrioventricular valve on the same side of the heart as the origin of the aorta is the _____…
A: ATRIOVENTRICULAR VALVE It is the valve present between atrium and ventricle. It allows the flow of…
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: Fill in the blank: The fibers that carry cardiac impulses from the interventricular septum into the…
A: Cardiac impulses originate from the sinoatrial node that causes the contraction of the heart muscles…
Q: Why would a fourth chamber heart be evolutionarily advantageous to an animal?
A: Introduction:- Birds and mammals, on the other hand, have a four-chambered heart with a fully…
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: If the AV node was damaged, the parts of the heart that would fail to contract are (the) O a. right…
A: The cardiovascular system is a network of arteries and veins in which the heart pumps blood. One of…
Q: What are the pathways of conduction through the heart?
A: The conduction system in the heart is basically a collection of nodes which can consist of nerve or…
Q: What is the role of one-way valves in the return of blood to the heart?
A: Most of our blood volume is carried in the veins. Veins are blood vessels that carry blood back from…
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: What are the main components of the venous system in the heart?
A: The venous system is composed of veins. The veins are the part of the vasculature long with…
Q: Can you describe how blood moves through all parts of the heart?
A: From the tiny air sacs, through the walls of the capillaries, oxygen and carbon dioxide travels into…
Q: What are the basic blood vessels in the heart? Describe briefly the function of each.
A: The circulatory framework, likewise called the cardiovascular framework or the vascular framework,…
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…
Q: Pressure changes that occur during the cardiac cycle are responsible for what two physiologic…
A: The cardiac cycle is the time interval between atria contraction and ventricular relaxation. Fluids,…
Considering the function of the heart, why is it important that the myocardium cannot be tetanized?
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- Figure shows the conduction system of the heart that transmit the electrical impulses for the coordination of cardiac cycle. a) Referring to the Figure , which part of the heart's electrical conduction is known as the “pacemaker” of the heart? b)Explain how D controls atria and ventricles which causes ventricular systole.Describe why a doctor would give a patient that is diagnosed with acute myocardial infarction the treatment of tissue plasminogen activator(tPA)? What will it do?Explain why it is sufficient to replace the ventricles, but not the atria,in artificial heart transplantation.
- What is the function of the heart? Explain.Which of the following statements regarding heart valves is NOT true? a) They are flaplike structures. Ob) There are four valves in the heart. Oc) They prevent backflow of blood. d) They must remain tightly closed in order to work properly.What vessels attached to the heart contain oxygenated blood? Are they both arteries? Explain.
- Why is the Sino-atrial node called the pacemaker of the heart?All the blood that passes through the aorta, except the blood that flowsinto the coronary vessels, returns to the heart through the venae cavae.(Hint: The diameter of the aorta is 26 mm, and the diameter of avena cava is 32 mm.) Explain why the resistance to blood flow in theaorta is greater than the resistance to blood flow in the venae cavae.Because the resistances are different, explain why blood flow can bethe same.Why is it necessary for cells of the cardiac atria and ventricles to contract in a coordinated manner? How is this accomplished?
- Select the correct statement regarding the AV node B) it produces the P wave on the EKG C) it is also known as the heart's pacemaker D)it contains autorhythmic cellsInflammation of the pericardium can lead to a condition called pericardial effusion, in which fluids collect in the space surrounding the heart. What effect would this have on the functioning of the heart? How might the condition be treated?Briefly define 1) Starling’s Law of the heart, 2) the basic cellular mechanism thought to mediate this response, and 3) the physiological significance of this effect.