When the SA node fails, the AV node establishes a new intrinsic heart rate. This will result in Increased parasympathetic output to the SA node Increased blood pressure Increased blood flow through the pulmonary circulation Decreased cardiac output As Decreased sympathetic output to the SA node 20

Q: Explain the conduction system of the heart. How heart rate is controlled in our body.

A: The conducting system of heart It is made of myocardium that is specialised for initiation and…

Q: Generates electrical impulse that sets rhythm to the heart; the primary pacemaker of the heart. SA…

A: Heart has conductive system which generates and transfer the electrical impulses.

Q: Some people have abnormal cords or bridges of myocardium that extend from atrium to ventricle,…

A: The second most common type of coronary arterial abnormality is the Myocardial bridge. It is the…

Q: Which ion movement causes depolarization in the contractile cells of the heart? Ca++ leaving the…

A: The human heart is a muscular blood pumping organ made up of electrically excitable cardiac muscle…

Q: What is the effort of different types/intensity of exerise on heart rate

A: We can measure exercise intensity using target heart rates, the talk test, or the exertion rating…

Q: The AV node delay: a. allows the atria and ventricles to depolarize and contract as a unit. b.…

A: The human heart consists of the left and right atria and the left and right ventricles. The heart…

Q: Which of the following lists the events of the cardiac cycle in thecorrect order?a. both atria…

A: Answer- Cardiac cycle is the process by which one total heartbeat is completed. It comprises of…

Q: When the ventricles are no longer acting as a syncytium and can't pump blood, they are in ____.…

A: The conditions where the heart of a normal person is unable to function properly is called as heart…

Q: Which one of the following is a matching pair?  A Pulsation of the radial artery - values in…

A: Heart is the muscular organ in most animals that is involved in pumping blood through blood vessels.…

Q: Cardiac output cannot increase indefinitely because (a) available filling time becomes shorter as…

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Q: Maximum aortic pressure during the cardiac cycle is called pressure

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Q: In the figure below on the left, label the P, QRS and T waves. Describe what is happening in the…

A: The question consist of two parts but according to the rules of Bartleby.com only the first question…

Q: Given these events, the correct sequence of the cardiac cycle is: i. Atrial diastole ii. Atrial…

A: In the cardiac cycle, diastole means that the heart chamber is filled with blood received from the…

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: hy blood pressure falls despite the increase in heart rate

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Q: Describe the pressure changes in the atria and ventriclesduring a cardiac cycle.

A: The heart is an organ found in animals which is specialised to pump blood in the body. The heart is…

Q: In supraventricular tachycardia, the rhythm may originate from any of the following, except SA Node…

A: Arrhythmias are irregular rhythms that do not obey the typical sequence of events. They are divided…

Q: The steep depolarization phase of an action potential in the SA node of the heart is caused…

A: INTRODUCTION The action potential is a quick rise and sudden fall in voltage and membrane across a…

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: Right and Left Ventricular pressures differ during:   the entire cardiac cycle diastole systole the…

A: The cardiac cycle is referred to as one heartbeat that consists of one cycle of contraction and…

Q: During a heart attack, the blood flow to cardiac muscle tissue is blocked, and cardiac muscle cells…

A: The heart is a major organ in the circulatory system whose function is to pump blood throughout the…

Q: The QRS wave of an ECG is produced by. a. depolarization of the atria. b. repolarization of the…

A: ECG or electrocardiogram is a diagram or graph of the electrical activity of heart that is produced…

Q: The image above shows the change in blood volume in the left ventricle through time. Identify what…

A: Answer: CARDIAC CYCLE = This is the cycle in human system which involves the conversion of…

Q: Describe one cardiac cycle, beginning with both atriaand ventricles relaxed

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Q: John is your 68-year old neighbor who was recently told by his doctor that his heart’s main…

A: Cardiovascular system consists of the heart, blood vessels. The main function of the heart is to…

Q: Which of the following is/are true concerning the opening and closing              of the  cardiac…

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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: Pulse is a direct measure of(A) blood pressure.(B) stroke volume.(C) cardiac output.(D) heart rate.

A: The pulse of a person is measured by placing one’s finger on the inside wrist of that person. The…

Q: Fill in the blank:  The period during which a heart chamber is relaxing is called…

A: Human Heart is a four-chambered, fibro-muscular organ. There are two atria through which the heart…

Q: The onset of the QRS complex of the ECG is most closely related to which of the following cardiac…

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Q: During contraction of heart, what prevents backflow of blood?a) Thin walls of atriab) Thick muscular…

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Q: The first heart sound represents which portion of thecardiac cycle?a. atrial systoleb. ventricular…

A: The heart is a hollow muscular organ. It pumps the blood via circulatory system through rhythmic…

Q: The blood vessels responsible for variably distributing cardiac output among organs in the body are:…

A: Animal physiology is the systematic study of the supporting features, roles, and processes of…

Q: The onset of Ventricular diastole is associated with: A. the closing of the aortic valve B. the…

A: Human heart is composed of two auricles (atria) and two ventricles. Cardiac cycle consists 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: 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: During what phase does blood flow from the ventricles into the pulmonary trunk and aorta?…

A: The recurring sequence of changes that takes place in each beat of the heart ( cardio dynamic events…

Q: After his accidents Christopher Reeves heart would stop beating eventually because the breaking of…

A: Answer : False

Q: The intrinsic heart rate is established by O Sympathetic innervation of the SA node O Autorhythmic…

A: Answer: Intrinsic heart rate is defined as the rate at which heart beats when all cardiac neural and…

Q: Which of these resting heart rates is consistent with a normal sinus rhythm? O between 50 and 60 BPM…

A: Answer: HEART BEAT : It is a process of contraction and relaxation of the heart to pump out the…

Q: Which of the following term and definition pair is correctly matched? Group of answer choices…

A: The heart is a hollow muscular organ that is located behind the sternum and between the lungs. The…

Q: Place these events in the correct order as they occur in the cardiac cycle: 1. Contraction of the…

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Q: Which fiber system is the first to depolarize in a cardiac cycle? Group of answer choices AV node…

A: Question - Which fiber system is the first to depolarize in a cardiac cycle? Group of answer choices…

Q: After the AV node depolarizes , the next event directly following is A) AV bundle depolarization C)…

A: After passing through the AV node, the electrical current then continues down the conduction…

Q: Which of the following statements regarding congestive heart failure is correct? Group of answer…

A: Congestive heart failure (CHF) is a condition when muscles of the heart are affected to pump the…