Which component of the heart conduction systemwould have the slowest rate of firing?a. atrioventricular nodeb. atrioventricular bundlec. bundle branchesd. Purkinje fibers

Q: How is blood prevented from backflowing from the pulmonary trunk into the right ventricle? a.…

A: As the heart pumps blood, a definite series of valves open and close tightly. These valves ensure…

Q: The second heart sound ("dub") results from vibrations generated by the A. closing of the AV valves…

A: A normal heartbeat consists of two sounds- LUB and DUB. These sounds often occur as pairs in a…

Q: In the sheep's heart, the right atrium is _______ to the right ventricle.

A: Heart.  It is a muscular organ that pump the blood to different part of the body.

Q: The atria contract duringa. the first heart sound.b. the second heart sound.c. the QRS complex.d.…

A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…

Q: The part of the heart that relaxes when filling up with blood before ejection to the pulmonary…

A: Heart is the most important organ that pumps blood. It is divided into four compartments; right and…

Q: When is the blood pressure in the left ventricle greater than the blood pressure in the aorta?   A…

A: Cardiac cycle is a cycle through which atrial contraction ends with  ventricular relaxation. When…

Q: The heart is medial to the lungs? a. true b. false

A: The heart is the blood-pumping organ of the body and it is made of cardiac muscles. It is the main…

Q: The ascending aorta and pulmonary trunk develop from the embryonic:- a. bulbus cordis only. b.…

A: Ascending aorta refers to the part of the aorta that begins at the upper region of the left…

Q: Name the vessels which recieve blood from the heart and state the chambers which pumps into those…

A: Vessels are the component of circulatory system of the body. Their function is transportation of…

Q: What happens when the pressure in the ventricles becomes lower than the pressure in the atria?…

A: Answer  a) the atrioventricular valves open

Q: Venous blood from the heart wall enters the right atriumthrough thea. superior vena cava.b. coronary…

A: The type of blood that is in deoxygenated condition and moves from the peripheral blood to reach the…

Q: Why do you think it is important for heart valves to ensure that blood flows in only one direction…

A: Human heart is the Center for regulating blood across the body. It is made up of cardiac Muscles…

Q: Blood flow in the coronary circulationa. increases during systole.b.increases during…

A: Coronary circulation is the circulation of blood in the blood vessels which supply blood to the…

Q: What valve is located between the left atrium and left ventricle? a-Tricuspid valve b-Bicuspid valve…

A: Heart is a muscular organ. Heart pumps blood, it has four chambers having two atrium and two…

Q: Which vessel would blood in the right coronary artery pass through next?   A anterior…

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

Q: What does the circled structure do?

A: Heart Mesodermally derived organ, is situated in the thoracic cavity between the lungs, slightly…

Q: The function of structure X is to Select one: a. act as the pacemaker of the heart. b. initiate the…

A: Heart is located in the chest cavity and derived from mesodermal tissue. Heart is surrounded and…

Q: The two tubes that eventually fuse to form the heart arereferred to as the ________. a. primitive…

A: Gastrulation refers to the procedure by which cells of the blastula get recognized to produce the…

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: Blood flows directly from the left atrium to_____ . a. the aorta c. the right atrium b. the left…

A: The heart has four chambers in human beings. They are the two upper atria and two lower ventricles.…

Q: After passing through the inferior vena cava blood passes through the A coronary sinus B posterior…

A: The cardiovascular system, also known as the circulatory system, is made up of a blood pumping…

Q: Which is the phase of cardiac cycle in which the auricles contract?

A: The cardiac cycle is the process of contraction and relaxation of the heart. The primary function of…

Q: Select the correct one, Which of the following would not increase Cardiac Output? A. increase blood…

A: We know that, The amount of blood pumped by the ventricles in 1 minute is measured in terms of…

Q: Blood leaves the right ventricle through the ______.   A pulmonary trunk   B right atrium   C…

A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…

Q: Which of the following cardiac tissues has the most rapid conduction velocity? A)The AV node. B)…

A: Purkinje fibre situated in both ventricle myocardium

Q: Predict the pressure changes that occur in the aorta, the left ventricle,and the left atrium after…

A: The heart is a smooth muscle organ that plays a major role in the circulation of blood. Human heart…

Q: Nursing When comparing Ist, 2nd and 3rd degree heart block: a. Which has the same contraction rate…

A: In heart blocks, the main problem arises because the contraction from the SA node reaches either…

Q: Which statement is true? A. All arteries carry oxygen-rich blood. B. All veins carry oxygen-rich…

A: The heart pumps blood and circulates it throughout all the body parts for their functioning. The…

Q: What are the four chambers of the heart called?

A: KEY WORDS:- Heart - The heart is a organ by which pumps blood to the circulatory system. Pumped…

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: What do the vessels that are carrying oxygen-poor blood back to the heart have that stops blood from…

A: The circulatory system of the body is the transport system of the body. The main function of this…

Q: An increase in mean blood pressure may be due to? a) an increase in heart rate b) an increase in…

A: During blood flow, blood exerts a force on the blood-carrying vessels. We know the pressure is the…

Q: During the cardiac cycle, when would you expect to hear the second heart sound? O a) After ejection…

A: The timeframe that starts with compression of the atria and closures with ventricular unwinding is…

Q: What is the function of the conduction system of the heart?

A: The heart is a muscular organ responsible for pumping blood and distributing oxygen as well as…

Q: a) Referring to the Figure , which part of the heart's electrical conduction is known as the…

A: A pacemaker is a little gadget that is put under the skin in your chest to help control your pulse.…

Q: What factors increase the chance of surviving a cardiac arrest?…

A: Cardiac arrest is a sudden loss of blood circulation failing the heart to pump efficiently. The…

Q: The diagram shows a human heart and some of its major blood vessels. Blockage of which labelled part…

A: Coronary heart disease or atherosclerosis happens when the major arteries of the heart get damaged.…

Q: Why might the increase in heart rate associated with a vigorous exercise program be the cause of his…

A: Cardiac muscles are the muscles that are present in the heart and are principally accountable for…

Q: What would happen to the heart rate if some stimulus causes the blood pressure to decrease?

A: Answer given in below step...

Q: Which of the following would not increase Cardiac Output? A. increase blood epinephrine…

A: The amount of blood pumped by the ventricles in 1 minute is measured in terms of cardiac output…

Q: Write a note on “Regulation of cardiac activity”?

A: The human heart is myogenic as it generates its own electrochemical impulse through the activity of…

Q: In a study of heart valve functions, it is necessary to inject a dye intothe right atrium of the…

A: Heart has valves Tricuspid valve: located between right atrium and right ventricle. Pulmonary valve…

Q: Double-loop circulatory systems are found in adult amphibians, reptiles, birds, and mammals.…

A: The double-circulatory system passes the blood twice through the heart, per circuit. The…

Q: In which of the heart chambers would deoxygenated blood be found? A)left atrium and left ventricle…

A: Blood Circulation in Circulatory System: Through two large veins (inferior and superior vena cava)…

Q: When you have a blockage of blood flow to the heart, it will likely result in what...?

A: Heart block is an abnormal heart rhythm where the heart beats too slowly,which results in the…