The first heart sound (S1) is caused by: O The aortic and pulmonary valves closing as ventricular pressure drops below arterial pressure O The AV valve opening as atrial pressure exceeds ventricular pressure O The aortic and pulmonary valves opening as ventricular pressure exceeds arterial pressure the AV valves closing as ventricular pressure exceeds atrial pressure

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: 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 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: 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: 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: What is the effect of high blood pressure on cardiac output? > View Available Hint(s) High blood…

A: In high blood pressure the arterial blood pressure increases. Hence for pumping out blood, the heart…

Q: The SA node of the heart creates a pace that is faster than does not generate a pace O the same as O…

A: What is the SA node - The SA (sinoatrial) node, also known as the sinus node, represents a…

Q: Which of the following will result in a decrease in resistance in a blood vessel? making the vessel…

A: The blood flows through different parts of the blood vessels to ensure that it reaches the target…

Q: The average pressure in the systemic arteries during an entire cardiac cycle is known as: O…

A: The cardiac cycle is defined as the complete cycle from contraction to relaxation of heart muscles.…

Q: The P wave on an electrocardiogram (ECG) represents the depolarization of cells in the: O…

A: Heart is an organ present in the circulatory system. It is responsible for pumping of blood to 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: he arteries that pass through the heart muscle are necessary for delivering enough oxygenated blood…

A: When the pressure inside the arteries is less than the pressure outside the arteries (due to…

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: Which of the following volumes should be the greatest? end-diastolic volume (EDV) O end-diastolic…

A: The system that pumps blood from the heart to the lungs to get oxygen is called as circulatory…

Q: Which structure is labelled "F"? Aorta Cardiac muscle Inferior vena cava Left atrium Left ventricle…

A: Heart is important organ of body which helps I. Pumping of blood across all the tissues and cells…

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: 23333 The aortic valve opens at which of the following lettered points on the ventricular volume…

A: Aortic valve is present between left ventricle and aorta.  Aortic valve opens during left…

Q: During which of the following periods are the large elastic arteries distributing blood to smaller…

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

Q: An increase in end-diastolic volume always causes an increase in stroke volume in a normal heart…

A: Stroke volume It is the amount of blood that is forced out from the ventricle per cardiac cycle. It…

Q: A premature ventricular contraction (PVC) indicates which of the following

A: This question is based on the physiology of heart.

Q: On an ECG erratic waves indicates. and is associated with O ventricular fibrillation, second-degree…

A: A human heart is a four-chambered muscular organ that is used to pump blood to different parts of…

Q: Concerning ventricular filling, choose the CORRECT statement? O a. Begins during isovolumic…

A: 1)The left ventricle takes blood from the left atrium during diastole, which is then discharged into…

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

A: Cardiac valves present in the heart regulate the flow of blood from one chamber of the heart to the…

Q: Identify the bundle of His O under the left ventricles O between the right and left ventricles of…

A: "The bundle of His" is an important part of the electrical conduction system of the heart. It…

Q: The normal pacemaker of the heart is the ______.   A sinoatrial node   B left atrium   C…

A: Heart is an important organ that pumps blood. Heart is myogenic in nature meaning it is capable of…

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

A: Isovolumetric ventricular contraction - This phase marks the beginning of systole and starts with…

Q: Which portion of the ECG corresponds torepolarization of the atria?a. P waveb. QRS complexc. T…

A: The cardiac action potential refers to a brief variation in the membrane potential through the cell…

Q: At the point labeled E the 120 В Aortic pressure 60 A DE Atrial pressure Ventricular pressure O…

A: The heart is divided into left and right sides separated by a septum. Both the sides are divided…

Q: Which of the following statements is true about the SA (sinoatrial) node? a. The action potential…

A: The sinoatrial node ( SA node ) is a group of cells located in the wall of the right atrium of the…

Q: The degree of stretch experienced by the sarcomeres in the ventricle cells before they contract is…

A: The simplest functional unit of striated muscle is the sarcomere. Across two Z-lines, it is the…

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: stions. Which structure is labelled "E"? Aorta Black arrows indicate direction of blood flow Blue…

A: The human heart is a muscular organ that pumps blood. It is about the sized of a clenched fist. The…

Q: A person has a blood pressure of 145/95. What does the number 145 represent? Select one: O a.…

A: Blood pressure is the force exerted by the circulatory system to circulate blood through the body.…

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 is/are true concerning the opening and closing of the cardiac valves? A.…

A: Backward blood flow is prevented by the valves. On each end of the two ventricles are flaps that act…

Q: blood flow in the left coronary artery is less during systole than diastole

A:

Q: Describe the different Heart sounds and what happens to each valve(s) during these heart sounds.

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

Q: Which valves are closed during isovolumetric contraction & isovolumetric relaxation of the…

A: The Human heart is the Center for regulating blood across the body. It is located within the…

Q: From which chamber of the heart does blood leave to go to the body: O Left atrium O Both left…

A: Please follow step 2 for detailed explanation.

Q: The heart’s internal pacemaker beats by: a. an internal implant that sends an electrical impulse…

A: The heart is a muscular organ in numerous animals, which siphons blood through the veins of the…

Q: What normally serves as the pacemaker of the entire heart? O Purkinje fiber system O…

A: Introduction: The heart has a specialized cardiac musculature known as nodal tissue (distributed in…

Q: What valve prevents the backflow of blood from the right ventricle into the right atrium? right…

A: One of the most essential systems in the human body is the circulatory system. It is made up of the…

Q: A membrane called the _____ covers the heart. A membrane superficial to this membrane is the _____.…

A: The pericardium is the thin sac-like covering of the heart. It lubricates the heart and is required…

Q: time of ventricular repolarization [Choose ] [Choose] time of atrial repolarization A time of…

A: ECG means electrical activity of heart represented in a graphical form. Electrocardiography is a…

Q: When the SA node fails, the AV node establishes a new intrinsic heart rate. This will result in…

A: The rhythm of the heart is normally determined by a pacemaker site known as the sinoatrial (SA) node…

Violence

Violence is defined as a physical act that causes or is intended to cause harm. Violence can cause physical, emotional, or both types of harm. Violence is defined by the World Health Organization as the intended use of physical force and power that causes threat or harm against oneself, another person, or against a community or group, and has the potential to cause damage, death, mental distress, maldevelopment, or poverty.