An ectopic pacemaker refers to the condition in which _____.   A the rate at which the SA node cells undergo spontaneous depolarization is abnormal   B "all of the heart cells function independently of one another such that the heart vibrates, but fails to pump blood"   C action potentials in the heart are initiated by a region other than the sinoatrial node   D the endothelial cells

Q: called the ______ and at least one thicker-muscled chamber that squeezes blood out of the heart:…

A: Circulatory system Heart is made up of chambers which function to pump blood and act as temporary…

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: Within the T-P interval of the EKG... a. The 2nd heart sound is heard b. the semilunar valves are…

A: a. The 2nd heart sound is heard

Q: The major baroreceptor(s) used to regulate blood pressure is/are located in… Group of answer…

A: Baroreceptors sense the change in blood pressure and transmit information to the brain so that…

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: For questions #10-20, match each term to its definition. _____ . Vein…

A: Heart is defined as the hollow muscular organ which is composed of several layers of cardiac muscles…

Q: A Myocardial Infarction is defined as: a. Chest pain that usually starts with physical exertion and…

A: Human Heart is a four-chambered, fibro-muscular organ. There are two atria through which the heart…

Q: The human heart is A) Neurogenic heart B) Myogenic heart O C) Pulsating heart D) Ampullary heart

A: Introduction:- The human heart is an organ that pumps blood through the circulatory system's veins,…

Q: e to heart transplantation is: art

A: Heart transplantation heart transplant, or a cardiac transplant, is a surgical transplant procedure…

Q: The human heart is: A) Neurogenic heart B) Myogenic heart C) Pulsating heart D) Ampullary…

A: Heart is a muscular organ in circulatory system. It plays an important function of circulating…

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: 1. The source of the electrical currents that you measured on the skin throughout a normal…

A: Note: According to the given guidelines, we are supposed to answer only one question (1st question).…

Q: Which of these conditions occurs in the repolarization phase of an action potential in pacemaker…

A: When the change in the membrane potential occurs due to voltage decrease, then it is called…

Q: At the time point indicated on the ECG ____.   A blood would be flowing from the ventricles into…

A: An electrocardiogram can be defined as the type of test in which the heart's electrical activity is…

Q: P is the pressure exerted AV is the change in the volume During each heartbeat in the resting…

A: Given information The work done by the heart = work done by left ventricle + work done by right…

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

A: Semilunar valves are valves of the heart and the shape of valves prevents the blood to flow back…

Q: نقطة واحدة Veins .1 a.Carry blood away from the heart. O b.Connect the smallest arteries to the…

A: * veins are the blood vessels which carry blood toward heart. *They carry deoxygenated blood to…

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: Action potentials in the ventricular cardiomyocytes differ from those in the SA node in that action…

A: Heart is the organ that pumps blood to all regions of the body. Muscles of the heart (cardiac…

Q: Match The Descriptions A Vessels that carry blood away from the heart. B Vessels that carry blood…

A: There are three types of blood vessels-  arteries, veins and capillaries. Arteries mainly carries…

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: Stable angina is defined as: a. Chest pain that usually starts with physical exertion and is…

A: Cardiac physiology plays a critical role in the appropriate perfusion of organs in our body with…

Q: Righ atrium Left verie Right verticle ventcular A ovolumetrie Ventricular contraction contraction…

A: A heart valve helps in the movement of blood in only one direction by heart.Four valves are.Four…

Q: 1- The left ventricular wall of the heart is thicker than the right wall in order to…

A: Introduction :- Near the heart base, the ventricular wall is thickest, and it thins out to 1-2 mm at…

Q: Hyperkalemia or high blood potassium is associated with a.Heart arrhythmia b.Cardiac arrest c.Not…

A: The causes of hyperkalemia may be a kidney disease, excess intake of potassium rich diet or certain…

Q: A heart murmur would be detected in the pathological situation in which blood was flowing from the…

A: Heart murmurs are defined as the blowing or whooshing sound which is heard during a heartbeat caused…

Q: The most common disorder affecting the heart and blood vessels is ? A. arrhythmia B. Hypertension…

A: There are different types of abnormalities found in the function of heart and in the circulation of…

Q: e pacemaker of the mammalian heart is the breviation acceptable) (2 words,

A: The mammalian heart is a muscular organ.

Q: In ventricular fibrillation, there is no pattern visible in the EKG. What does this mean in terms of…

A: Venticular fibrillation produces irregular electrical signals in the muscles of the ventricles .

Q: Heart failure occurs when   a. the cardiac output is 15 liters per minute when you are watching…

A: A heart failure means that the heart muscle doesn't actually  pump as much blood as per  body…

Q: In a normal heartbeat the atria contract ______.   A at exactly the same time as the ventricles   B…

A: Rhythmic pulsation of the heart as a result of an action potential is known as the heartbeat. The…

Q: Even though it is trivial that Beta Blockers might have negative inotropic effect on the heart, but…

A: Beta-blockers act on the Beta 1 receptors which are located in the heart and it slows down the…

Q: An electrocardiogram (ECG) measures the ____.   A difference in electrical potential between two…

A: An electrocardiogram or ECG is a simple non-invasive test conducted on the patient to check his /…

Q: Which of these conditions results the unstable resting membrane potential seen in pacemaker cells?

A: The membrane potential is also termed transmembrane potential or membrane voltage. It is the…

Q: One difference between the semilunar valves and the atrioventricular valves is that only the…

A: The valves that are found between the atria and ventricles are termed as atrioventricular valves,…

Q: Choose ALL that apply to the above image. Ais the Purkinje fiber. O Bis the L Bundle Branch. A helps…

A: The heart is a muscular organ that acts as a pumping machine in higher animals. The human heart…

Q: The type(s) of vessels which could develop an aneurysm is (are) ___.     arteries only     veins…

A: The types of vessels which could develop an aneurysm is arteries only.

Q: The left ventricular wall of the heart is thicker than the right wall in order to ________.   A…

A: Heart is muscle which pumps blood to all parts of your body to provide it with the oxygen and…

Q: Which of these events occurs during (ventricular) systole? A)Only the left ventricle contracts.…

A: Diastole and systole are two phases of the cardiac cycle. Systole occurs when the heart contracts to…

Q: In a healthy heart, which of the following statements is TRUE? A) Depolarization of the…

A: Answer- Option C. It's description has been mentioned in next step that is as follows-:

Q: f the sinoatrial node stopped generating action potentials the heart would _____.   A stop beating…

A: The heartbeat starts with an impulse generated by the sinoatrial node (SA node) also known as the…

Q: 22. Ventricular Contractility increases in response to circulating Epinephrine. What factor is…

A: As you have posted  multiple questions, only the first  3 questions i.e questions 23, 24, 25 will be…