Which structure is responsible for sending the electrical excitation from the atria towards the ventricles. Left bundle branch Sinoatrial node Right bundle branch Atrioventricular node Purkinje fibers

Q: Autorhythmic cells are located only in the interventricular septum. True or False

A: The cardiac muscle fibers are interconnected with the help of intercalated discs and so the…

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: bq elprie Sinoatrial node spontaneously fires an action potential action potentials move through…

A: The concept behind the electrical conduction system of the heart lies in the precise and coordinated…

Q: Which of the following is TRUE of the cardiac action potential? O The cardiac action potential…

A: The muscle action potential is generated due to the contraction and relaxation of the muscle fiber.…

Q: In which of the following vessel types are there the most elastic fibers? Group of answer options…

A: Veins have the lesser elastic fibers as compared to arteries.

Q: Chordae tendineae: Group of answer choices hold the AV valves in place. contract when the heart…

A: The papillary muscles of the heart are connected to the mitral and tricuspid valves cusps by thin…

Q: Which chamber(s) will be contracting right after this electrical event (in red) Q S

A: The cardiac cycle can be referred to as the human heart’s activity, which includes atrial…

Q: During an electrocardiogram, the T-wave represents atrial depolarization. QRS complex represents…

A: Electrocardiogram (ECG) is a test that helps to assess the electrical activity of the heart. It…

Q: Drugs inhibiting sodium channels would most likely affect which of the following phases of the…

A: Ventricular action potential occurs when sodium ion channels open that causes depolarization. This…

Q: The finest passages through which electrical signals pass before reaching the ventricular…

A: Introduction: The muscle of heart is composed of small cells through which electrical signals are…

Q: What anatomical feature prevents the electrical signal from traveling directly from atrial muscle to…

A: The heart is a muscular organ that is divided into the left and right side to prevent the mixing of…

Q: Which vessels open to the right atrium and left atrium of the heart

A: The human circulatory system is one of the major eleven organ systems in the human body and is…

Q: the amount of blood pumped by the ventricucles each is referred to as

A: The heart of a human being consists of 4 chambers with two on the right side and two on the left…

Q: Which part of the heart is responsible for the muscular contractions that pump blood through it?…

A: Heart is a muscular organ present in thoracic cavity which helps in blood flow through out the body.

Q: Which of the following occurs during ventricular diastole? Blood returns to the heart Blood is…

A: We know that the Cardiac cycle is a repetitive cycle where a heart performs its functions. This…

Q: The left ventricle wall is very thick since it must pump blood to the entire body along miles of…

A: Human heart is a four chambered pump like organ. Among the four chambers, two are auricles and two…

Q: Which of the following is not correct regarding the heart? ventricular fibrillation occurs from…

A: Heart is the major organ of the cardiovascular system. It is the mesodermally derived organ and it…

Q: The cardiac skeleton electrically insulates the atria from the ventricles? Why is this important?

A: The cardiac skeleton electrically  insulates the atria from the ventricles. The fibrous skeleton…

Q: The volume of blood ejected from the left ventricle in each beat is ventricle. A greater than B…

A: The heart is a highly muscularized, involuntary organ of the body. It has four chambers consisting…

Q: Compared to the right ventricle, the left ventricle has all the following characteristics, except…

A: The human heart consists of four chambers, two atrium and two ventricles.  The blood flows into the…

Q: Explain why ventricles are more muscular than atria

A: Heart ventricles: The large, lower chembers of the fibromuscular organ(heart) that collect and expel…

Q: What are the differences between the atria and ventricles. Compare these

A: Atria are the upper two chambers of heart and ventricles are the lower two chambers of heart. Upper…

Q: Describe the function of the SA and AV nodes as they control contraction of the heart.

A: The heart is a major player of the circulatory system and is a pump made up of muscle tissue. The…

Q: Which ventricle has the thickest wall? Why is it important for eachventricle to pump approximately…

A: Ventricles can be described as the muscular chamber of the human heart, which helps pump blood into…

Q: Which chamber of the heart has to contract against the greatest afterload?     right ventricle…

A: Afterload is the pressure which heart has to overcome to open the aortic valve and eject the blood…

Q: The role of the bundle of his, bundle branches, and purkinje fibers is to Help conduct the…

A: Bundle of his, bundle branches and purkinje fibres are all conducting fibres found in the heart.…

Q: left coronary artery great cardiac vein right coronary artery circumflex branch coronary sinus…

A: Introduction: The circulatory system comprises the central blood-pumping organ, the heart, and the…

Q: Which of these accounts for the similarity between the P wave duration and the QRS complex duration…

A: This question dives into the complexities of cardiac physiology, particularly centering on the…

Q: Which of these will increase the heart rate? O sympathetic stimulation of SA node O parasympathetic…

A: The heart has an autorhythmicity trait that allows it to beat without being controlled by the…

Q: When during the cardiac cycle do ventricles contain their maximal amount of blood? At the end of…

A: Cardiac cycle is referred to as the time period between the contraction of atria and the relaxation…

Q: Why is the wall of the left ventricle thicker than the wall of the right ventricle? View Available…

A: Circulatory system is a type of body system which is involved in circulation of body system and…

Q: During what stage or stages is blood being pumped from the atria into the ventricles

A: The cardiac cycle completes in four different stages: They are filling phase, isovolumetric…

Q: Define atrioventricular (AV) bundle

A: The atrioventricular bundle can be defined as a bundle that comprises specialized fibers of the…

Q: Right ventricular pressure is always the same as left ventricular pressure

A: Our heart is divided into four chambers. Two ventricles and two auricles. Our heart is divided into…

Q: The semilunar valves prevent blood from moving: Group of answer choices from the atria back into…

A: The heart is composed of four chambers that are- two atriums and two ventricles. Different valves…

Q: which ventricle ejets more blood

A: Answer.   Considering a few cardiac cycles it is found that left ventricle pumps more blood than the…

Q: During which phase of the cardiac cycle do the ventricles begin to contract while the semilunar…

A: Right semi lunar valve is present between the right ventricle and the Pulmonary artery . it pumps…

Q: Sympathetic stimulation increases the phosphorylation of the Ca2+ATPase in the sarcoplasmic…

A: Sympathetic stimulation is sympathetic nervous system stimulation which causes the increase in heart…

Q: correct statement about gap junctions:

A: The cardiac muscle tissue forms the walls of the chambers of the heart. Intercalated discs are…

Q: In atrial fibrillation, the atria do not contract correctly, and not all blood exits this chamber.…

A: Pulmonary embolism can be a serious complication resulting from right atrial fibrillation. One of…