During the period of isovolumic contraction: A. the AV-valves are open and the aortic & pulmonary arterial valves are closed. B. all valves are open. C. all valves are closed. D. the AV-valves are closed and the aortic & pulmonary arterial valves are open. E. None of the above is correct.

Q: During diastole: A. the AV-valves are open and the aortic & pulmonary arterial valves are closed. B.…

A: Systole and diastole are part of cardiac cycle. Systole means contraction of heart and diastole…

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: In a blood pressure reading of 120/80, the 120 represents and the 80 represents . (a) diastolic…

A: Introduction: Blood pressure is the pressure exerted by the blood on the walls of the arteries.…

Q: Match the following:   ? Prevents backflow into the left ventricle   ?  Prevents backflow into the…

A: Valves are flap like structures which are present in heart and helps in movement of blood in one…

Q: In the following graph, curve (line) N represents a vascular function curve (venous return curve) in…

A: Introduction :- Venous return is the flow of blood from the periphery back to the right atrium, and…

Q: The vessels that carry oxygen to the myocardium are called __________.   A pulmonary arteries   B…

A: Blood is the body fluid that flows in tube-like structures known as vessels and functions in the…

Q: The trabeculae carneae are located in the __________.   A epicardium   B ventricles   C atrium…

A: Step 1 The trabeculae carneae or columnae carneae are either rounded or irregular muscular columns…

Q: The valves which allow blood to flow from the ventricles into the arteries and not in the opposite…

A: The valves are the muscular flap like structures that are present between the two chambers of the…

Q: The pulse pressure is a measure of a. the number of heartbeats per minute. b. the sum of the…

A: Blood pressure records two measurements: systolic pressure and diastolic pressure wherein systolic…

Q: In a healthy young adult, what happens to cardiacoutput when heart rate increases above 160 bpm?a.…

A: Cardiac output is also known as heart output. It describes the amount of blood being pumped by the…

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: An area of dead myocardial tissue is called: A) an infarct B) stenosis C) an induration D)…

A: Answer is A.) an infarct.

Q: nodal delay a. maintains cardiac output by allowing enough ventricular filling. b. prevents…

A: The AV node is a highly specialized conducting tissue that slows the impulse conduction considerably…

Q: Blood pressure can be significantly affected by (a) cardiac output (b) peripheral resistance (c)…

A: The wall of the arteries experiences a force that is exerted by the blood, this force is called…

Q: The atrioventricular valves open because ______.   A relaxation of the ventricles causes the…

A: Atrioventricular valves These are the valves which connect the atrium to the ventricles. There are…

Q: Cardiac output can decrease by .. a. Increasing pressure in veins. b. Drugs with positive inotropic…

A: Introduction:- Cardiac output is defined as the blood ejected from the heart per minute. Cardiac…

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: If the pressure in the ventricles is higher than the pressure in the atria, but lower than the…

A: Heart valves open and close in response to pressure changes inside the heart chambers. the fluid…

Q: Which point on the PV loop corresponds to the opening and closing, respectively of the aortic valve?…

A: Introduction :  PV loop derived from pressure and volume data found from cardiac cycle. If left…

Q: Arteries of the pulmonary circuit differ from those of the systemic circuit in that they carry, (a)…

A: The heart is the pumping organ that is responsible for circulating the blood to different parts of…

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: A) Name the blood vessel and B) Identify the valve A B A) Aorta; B) Aortic Semilunar valve A)…

A: Heart situated in the left thoracic cavity in the cardiac notch.

Q: ne symptom of right ventricular failure would be _____.   A difficulty breathing when lying in the…

A: The right ventricle moves deoxygenated blood from the heart back to the lungs to be resupplied with…

Q: High pressured blood in the ventricles: O forces the AV valves open. O forces the semilunar valves…

A: The heart is the blood pumping organ of animals. It is composed of 4 chambers. The 2 upper chambers…

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: he inferior vena cava brings blood from the lower regions of the body and empties into the…

A: the inferior vena cava is the largest vein and it carries deoxygenated blood from the lower body…

Q: During isovolumetric relaxation, the atrioventricular and semilunar valves are: a. open and…

A: Cardiac cycle explains the flow of blood in the heart during a single heartbeat. This helps to…

Q: A. begins with closure of the AV-valves and ends with opening of the valves B. begins with opening…

A: There are two types of atrioventricular valves. The mitral and the tricuspid valves, also known as…

Q: It is generally accepted that a relatively low diastolic vascular pressure is more important than a…

A: The term blood pressure is used to describe the pressure exerted by the blood on the blood vessel in…

Q: All of the following are correct about the isovolumetric contraction, except  ____________.…

A: Isovolumetric contraction is that phase of cardiac contraction in which there is no appreciable…

Q: The coronary arteries arise from the __________.   A right atrium   B inferior vena cava   C…

A: The coronary system comprises of arteries, arterioles, capillaries, venules and veins. These…

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: Which of the following changes happen at birth or a couple hours afterward? A) The connection…

A: After birth, several changes take place in the circulation of blood via the heart. After…

Q: Stroke volume is equal to the ______.   A amount of blood pumped in a single beat by both…

A: The cardiac cycle can be described as a cycle during which blood flows in and out of the heart's…

Q: When reading blood pressure, the top number refers to the __________    a. Diastolic pressure   b.…

A: Blood Pressure  The lateral pressure exerted by the flowing blood on the arterial wall. The blood…

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: Which statement about atrial contraction is true.   A the end diastolic volume is the volume of…

A: Atrium is the upper chamber through which entry of blood occurs in ventricles of heart.There are two…

Q: The "pump" or "pressure-head" for the pulmonary circulation is the: A. right atrium B. right…

A:

Q: In the cardiovascular dynamics experiment (part 2), if the left flow tube represents the pulmonary…

A: The blood circulatory framework is an arrangement of organs that incorporates the heart, veins, and…

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: At what point is the pressure in the ventricles increasing most rapidly?   A when both sets of…

A: The measurement of the blood pressure in the ventricles of the heart is known as ventricular…

Q: Give answer from image shown.

A: The cardiac physiology is defined as the study of the function of the heart that is healthy and…

Q: Which of the events below does not occur when the semilunar valves are open?   A Ventricles are in…

A: The heart valves regulate the blood flow into and out of the heart. The normal human heart contains…