The marks a spot of dead myocardial cells. How does this change the depolarization and muscle contraction patterns in specific locations of the heart?

Q: A patient has tachycardia. Would you recommend a drug that prolongsor shortens the plateau of…

A: Tachycardia is a condition that makes our heart beat more than 100 times per minute. There are three…

Q: A patient is suffering from cardiac arrhythmias. They have atrial fibrillation. Describethe normal…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Recoil of muscular arteries maintains blood flow during ventricular diastole. True or False

A: The circulation of blood throughout the body is governed by several blood vessels. Muscular arteries…

Q: The conductance of which ion results in phase 2 characteristics in a ventricular myocyte action…

A: The non-pacemaker cardiac action potentials include the atrial and ventricular myocytes and Purkinje…

Q: . ECG depicts the depolarization and repolarization processes of a cardiac cycle. In the ECG of a…

A: The electrocardiogram (ECG) is the total amount of the action potentials of millions of…

Q: In the figure below on the left, label the P, QRS and T waves. Describe what is happening in the…

A: The question consist of two parts but according to the rules of Bartleby.com only the first question…

Q: А In the image above, the dotted line represents a normal pacemaker potential. Describe the steps…

A: The heart is a major muscular organ of the cardiovascular system that is responsible for pumping the…

Q: Explains the significance of long refactory period in cardiac muscle and the importance of…

A: Cardiac muscles are one of the three important muscle tissues present in the body. These muscles are…

Q: In dilated cardiomyopathy of the left ventricle, the ventricle can become enormously enlarged.…

A: The human heart is four-chambered, with two atria and two ventricles. The atria have thin walls…

Q: Describe and compare action potentials in cardiac pacemaker and contractile cells.

A: Action potential: It is the series of electrical changes which occur in the membrane potential when…

Q: a patients blood test showed high levels of myocardium-specific troponin, and her ECG showed ST…

A: ST elevation means that ST segment in ECG is abnormally high above the baseline. ST segment…

Q: Compare and contrast the molecular events of the action potential in the pacemaker cells of the SA…

A: The action potential is a crucial physiological process that occurs in both pacemaker cells of the…

Q: An elephant has an aorta that is approximately 8 cm in diameter and a restingheart beat of 35…

A: The circulatory system is one of the major systems among mammals. The circulatory system consists of…

Q: Contractile cardiac myocytes use calcium influx across the plasma membrane for all of the following…

A: "Since you have posted multiple question we will answer the first question for you. If you want…

Q: Describe the electrical event in the heart that occurs during each of the following: (a) the QRS…

A: Heart is a muscular organ which is responsible for pumping the fluid connective tissue called blood…

Q: Explain differences between action potentials of cardiac muscle cells and those in nodal cells of…

A: On the surface of the heart, muscle fibers are arranged to form a fused interconnected mass termed a…

Q: list in sequence the components of the elctrical conducting system of the human heart

A: A pump of muscle tissue consists of a heart and a supply of energy and oxygen is required for the…

Q: how two different heart muscle diseases (dilated cardiomyopathy and hypertrophic cardiomyopathy) can…

A:

Q: Cardiac output is determined by what two variables ? preload and afterload end - diastolic volume…

A: Cardiac output, otherwise called heart output, is a term utilized in heart physiology that portrays…

Q: All of the followings are correct about the myogenic pacemaker except, --------------------- They…

A: The cardiovascular system is a principal organ system of the human body concerned with the transport…

Q: Describe the anatomy of movement of the wave of cell depolarization throughout the heart during the…

A: The cardiac cycle:It is comprised of a whole relaxation and contraction of both the atrium and…

Q: Explain why Purkinje fibers conduct action potentials morerapidly than other cardiac muscle cells

A: Purkinje fibers are components of the heart's advanced conduction system, which guarantees that an…

Q: Why do the coronary arteries carry a greater blood flow during ventricular relaxation than they do…

A: The cardiovascular system is one of the organ systems of the body and its function is to circulate…

Q: raw a ventricular muscle cell action potential in the figure below. Briefly describe the changes in…

A: Similar to skeletal muscle, the resting membrane potential of ventricular cells, is around -90…

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: Why is the cardiac action potential propagated more slowly in an AV node cell then in an atrial or…

A: Cardiac action potential  It refers to the short alteration in the voltage i.e. membrane potential…

Q: The cardiac cycle includes all the events associated with the flow of blood through the heart during…

A: An electrocardiogram (ECG) is a recording of the electrical changes that occur in myocardium during…

Q: People with paroxysmal atrial tachycardia (commonly called "palpitations") are sometimes given drugs…

A: Voltage gated calcium  channels allow the entry calcium into plasma membrane. Inside the calcium…

Q: Show a photo of an intact,undissected heart with attached blood vessels and label fully all…

A: Human heart: The heart is a crucial organ that carries out the pumping of blood through the body.…

Q: Unlike skeletal muscle, cardiac muscle doesn’t undergo tetany. Explain how this is achieved and why…

A: Cardiac muscle or myocardium is the muscle that forms the heart tissue. These are striated and…

Q: Cardiovascular: How does the PSNS alter a pacemaker action potential? Give the mechanism.

A: The cells of the heart have a specialized function of initiating and conducting impulses for the…

Q: Myocardial contraction is named _____            Relaxation of heart named ______  What is the unit…

A: The heart is a specialized organ of our circulatory system composed of cardiac muscle tissue. It…

Q: In a cardiac contractile cell what is the mechanism involved in the change in membrane potential?…

A: The cardiac contractile cell undergoes various changes in order to perform several activities and…

Q: Cardiovascular: How does the SNS alter a pacemaker action potential? Give the mechanism.

A: The sympathetic nervous system (SNS) influences cardiovascular outcomes such as heart rate…

Q: Ectopic beats can be caused by myocardial irritability. As A/Os we may be able to reduce myocardial…

A: Ectopic beats Cardiac dysrhythmia is associated with abnormal electrical impulse conduction…

Q: Heart pathophysiology - How does the vasomotor center control peripheral resistance?

A: The medulla oblongata is formed from the myelencephalon and consists of several autonomic neurons…

Q: Explain why the SA node normally paces the heart.

A: In human heart, small groups of specialised neuromuscular cells are present within the myocardium.…

Q: Number of double circulations completed by the human heart per minute under resting conditions is

A: Components of closed circulatory system It consists of heart to pump the blood, blood vessels like’s…

Q: A heart beats 72 times per minute with a total of 10mL of blood pumped with each contraction. What…

A: Cardiac output is the amount of blood pumped each minute by the heart. It is calculated by…