The cardiac conduction system includes all of the following except:- a. the SA node. b. the AV node. c. the bundle branches. d. the tendinous cords. e. the Purkinje fibers

Q: Label in the diagram: 1. Sinoatrial node, 2. atrioventricular node, 3. bundle of His, the branches…

A: In this question, we are given a schematic diagram of the conduction system of heart. The labeling…

Q: Action potentials pass from one cardiac muscle cell to anothera. through gap junctions.b. by a…

A: The structures which provide adhesion and communication between cells are called intercellular…

Q: When ventricular walls relax: a. Mitral valve opens & tricuspid valve closes b. Tricuspid valve…

A: Mitral valve is also called the bicuspid valve  and it connect left Atrium to the left ventricle.…

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 side(s) of the heart would affected by high pressure in the pulmonary circuit? Which side(s)…

A: BASIC INFORMATION  PULMONARY CIRCUIT the blood pumped by right ventricles enters into the pulmonary…

Q: Purkinje fibersa. are specialized cardiac muscle cells.b. conduct impulses much more slowly than…

A: A fully developed adult heart maintains the capability of generating its own electrical impulse,…

Q: During which phase of the cardiac cycle are the semilunar valves open? Select one: a. atrial…

A: Human heart is a muscular organ which pumps blood to different parts of the body through the set of…

Q: A force that attracts fluid into the capillary from the tissue spaces is Select one: a. venous…

A: The question is asking about the force that pulls fluid back into the capillaries from the…

Q: The major source of compliance for maintaining blood pressure during the diastolic interval flow…

A: When heart pushes blood around our body during systole pressure on the vessels increases which is…

Q: 45. Which of the following is/are true concerning the opening and closing of thecardiac valves?   A.…

A: The valves of the heart maintain undirectional flow of the blood and prevent its regurgitation in…

Q: Cardiac contractility is enhanced by: A. Vagal stimulation. OB. Stimulation of Muscarinic receptors.…

A: Cardiac contractility is the heart's ability to pump blood around the body with force during systole…

Q: The delivery of blood by the left ventricle into the sorta is intermittent, whereas blood flow in…

A: Peripheral circulation refers to blood flow in smaller blood vessels such as arterioles and…

Q: You are testing a compound as cardioactive drug. You know the compound is an agonist of…

A: The sinoatrial (SA) node is known as the natural pacemaker of the heart, responsible for generating…

Q: Which of the following sequences for the conducting system is correct? Select one: a. AV node, SA…

A: The objective of the question is to identify the correct sequence of the conducting system of the…

Q: The largest cross-sectional area in the total circulation and lowest blood flow velocity is found…

A: Blood vessels are the structures that conduct blood to different parts of the body. The systemic…

Q: The cardiac cycle consists of a distinct relaxation andcontraction phase. Which term is typically…

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

Q: Which of the following channels are involved in the action potential in contractile cells of the…

A: An action potential is a sudden, fast, transitory, and propagating shift in the resting membrane…

Q: Cardiac action potentials have _________ duration than neuronal action potentials. A. a shorter…

A: Introduction Unlike the action potential in skeletal muscle cells, the cardiac nerve impulse isn't…

Q: entricular contraction begins at the Select one: a. AV bundle. b. apex of the heart. c. top of the…

A: The objective of the question is to identify the location where the contraction of the ventricles,…

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: 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 of the following is the correct circulatory sequence forblood to pass through part of the…

A: The heart is a pumping organ that continuously pumps blood to the entire body. It comprises four…

Q: Muscle impulses are spread rapidly between cardiac musclecells bya. sarcomeres.b. intercalated…

A: The heart is a muscular organ , located just behind and slightly left of the sternum. The heart is…

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: Which of the following is/are involved in regulating blood pressure? a. heart b. baroreceptors c.…

A: Blood Pressure can be defined as the pressure exerted by the blood flowing in the blood vessels on…

Q: During atrial fibrillation: O A. The EKG shows no discernable P wave. O B. There is a noticeable…

A: Human heart consists of four chambers: two atria and two ventricles. The left atria receive…

Q: mr. Holmes, a 72-year-old Caucasian male, suffered a heart attack which resulted in damage to a…

A: The cardiovascular system is a vital division of the body's circulatory system that concerns the…

Q: The second heart sound is caused by: a. closure of the aortic and pulmoary valvesb. vibrations in…

A: The objective of this question is to understand what causes the second heart sound in the cardiac…

Q: Which of the following is true regarding the conduction of electrical activity in the heart? Choose…

A: The objective of the question is to identify the correct statement about the conduction of…

Q: Cardiac output measures blood ejected from a. both atria each minute b. each ventricle each minute…

A: Cardiac output refers to the volume of blood that is pumped by the heart per unit of time, usually…

Q: Which of the following characteristics is unique to capillaries and not to other blood vessels?…

A: The blood vascular system has various components that help in the smooth circulation throughout the…

Q: The only area of the heart that receives innervation from the brain is called the: A.…

A: Cranial nerves are the part of the nervous system that assists in a variety of functions. These…

Q: The thickest part of the heart wall is thea. pericardium.b. epicardium.c. myocardium.d. endocardium.

A: The body comprises a total of eleven organ systems, and each of them is specialized to perform a…

Q: Increased parasympathetic stimulation of the hearta. increases the force of ventricular…

A: The parasympathetic neural system is associated with the activities concerned with normal 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: How would the left ventricle of a patient who had had high blood pressure for many years differ from…

A: Answer: Introduction: Left ventricular hypertrophy is expansion and thickening means hypertrophy of…

Q: During emergency situations, even if the nerves to the heart have been severed, the heart rate will:…

A: The Autonomic Nervous System (ANS) generally controls the movements of various parts in the body and…

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: Sketch the heart and draw all the coronary vessels in their correct locations. (Alternatively, you…

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

Q: The period between the filling of the ventricles and the opening of the semilunar valves in the…

A: The cardiac cycle is a period from the beginning of one heartbeat to the beginning of the next…