Discuss the events in an action potential that are generated in cardiac contractile cells.

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: Trace the biochemical electrical pathways that result in cardiac conduction

A: The collection of specialized cardiac myocytes located in the heart walls that send electrical…

Q: Should epinephrine or acetylcholine alter the rate of contraction of separated pieces of cardiac…

A: Neuotransmitters include epinephrine and acetylcholine. They work on beta and muscaric receptors,…

Q: Given the following cardiac performance data, Cardiac output (CO) 5 5400 mL/min Heart rate (HR) 5 75…

A: Introduction: Ejection fraction is a method for quantifying cardiac contractility. It has a value…

Q: Explain how the heart is a double pump and why this is significant

A: Human heart is situated in the space of thoracic cavity present between two lungs.

Q: Why is it necessary for cells of the cardiac atria and ventricles to contract in a coordinated…

A: Introduction :- Blood from the veins enters the two atria, which have thin walls. The heart's two…

Q: Compare action potential of pacemaker and non-pacemaker (working) myocardial cells?

A: Cell can be defined as the basic membrane-bound unit which contains the fundamental molecules of…

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: What initiates action potentials in cardiac muscle?

A: Generation of action potential activates the neuron during the generation of stimuli. It is studied…

Q: Briefly describe the events of excitation-contraction coupling in cardiac muscle cells.

A: Cardiac muscles are also called myocardium, which is a type of muscle in the body that is…

Q: Discuss Mechanical Events of the Cardiac Cycle?

A: The human heart contracts 72 times per minute at rest. During each heart beat, the heart chambers…

Q: Predict the consequences for the heart’s pumping effectiveness ifnumerous ectopic foci in the…

A: Ectopic foci are abnormal pacemaker sites outside the sinoatrial node.

Q: Which three skull sutures can be seen from a superior view ofthe skull? Which bones articulate at…

A: Sutures can be defined as a rigid joint present in the body's cranium bone and responsible for…

Q: Cells in the body have the ability to undergo a transiet depolarization and repolarization. A. Plot…

A: The heart contracts and relaxes to pump blood throughout the body. The contraction is controlled by…

Q: Another disease slows the rate of production of cAMP in both contractile and pacemaker cardiac…

A: There are three different kinds of muscle tissues in vertebrates: skeletal muscle, smooth muscle,…

Q: Describe the main theories for the termination of calcium sparks in the cardiac muscle excitation…

A: The answer is well explained above

Q: 29. 30. State the significance of the longer action potential in a cardiac CONTRACTILE cell. State…

A: The myocardial contractile cells comprise the mass amount of the cells in the atria and ventricles.…

Q: The following figure models a part of blood vessel network in two different points. If blood vessel…

A: Introduction:- Blood is the body's fluid in the circulatory system of humans and other vertebrates…

Q: Draw a ventricular muscle cell action potential.

A: The heart is a four chambered structure that is responsible for pumping the blood into the arteries…

Q: If a heart lacked gap junctions, an organ-level contraction would occur.True/False

A: Cardiac muscles are the striated, involuntary, and branch muscles with a characteristic feature of…

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: What is fibrillation and why can it be life-threatening?

A: Normally the heart muscle contractions occur in a synchronized manner. This synchronization is…

Q: Describe the changes in the left ventricular volume during the phases of the cardiac cycle.

A: Introduction: The cardiovascular system of the individual comprises blood vessels and the heart. A…

Q: Select the TRUE statement/s: Calcium channel blocker will affect which phase/s of the cardiac muscle…

A: The resting membrane potential of any cell is developed because of the presence of leaky channels…

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: Fibrillation is an asynchronous contraction of cardiac muscle fibers. Is atrial fibrillation or…

A: The heart is a muscular organ the size of a fist found just above and just to the left of the…

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: he strength of a peripheral pulse is

A: Pulse is the rhythmic dilation of an artery caused by the heart's pounding. The arteries of the…

Q: In the initial stages of ventricular fibrillation (during which the heart produces no functional…

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

Q: Describe the sequence of the cardiac conduction system.

A: The cardiac conduction system is th group of nodes and specialized conduction cells that starts and…

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: How does a positive inotropic agent increase the strength of cardiac muscle contraction?

A: A positive inotropic agent is any drug or medication that can change the force of contraction with…

Q: Define ECG?  What are the differences between P-mitral and P-pulmonale? Please briefly explain at…

A: A pumping organ of the body that pumps blood to different parts of the body is the Heart. Blood is…

Q: What mechanisms would be responsible for shortening of the ST segment TP interval T wave TP interval…

A: Introduction :- Electro-cardiogram (ECG) is a medical test that measures the electrical activity of…

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: Discuss the mechanism underlying AP generation by cardiac autorhythmic cells

A: Simply put, a cardiac arrhythmia is an abnormal heart rate and/or rhythm that is not biologically…

Q: What is the cardiac output of a person with a resting stroke volume of 60 mL and a heartbeat of 80…

A: Cardiac output is the volume of blood the heart pumps per minute. Cardiac output= stroke volume×…

Q: a) Electrocardiogram signal is shown In Figure 2. U

A: An ECG is a painless test that examines the electrical activity of your heart. An ECG…

Q: Calculate changes in length of cardiac cycle with exercise and discuss their significance

A: The cardiovascular or the circulatory system transports gases, nutrients, hormones and metabolic…

Q: Describe the interactions of actin, myosin, and the troponin-tropomyosin complex in controlling…

A: Heart muscles are also referred to as myocardium. It is one of the three major muscle types in the…

Q: What action potential of specialized heart cells know the function of each channel and the process?

A: The myocardium tissue contracts and relaxes without tiring.   The cardiac resting membrane potential…