Discuss how the SA and AV nodes control the contractionsof the heart muscle, as well as how these electrical changes

Q: Which of the following is unique to cardiac musclecells?a. Only cardiac muscle contains a…

A: The cardiac muscles show the characteristics of both smooth and striated muscles. The cells of…

Q: Describe how the pressure in the left ventricle and in the systemic arteries varies during the…

A: The heart is a muscular organ that is divided into the left and right sides to prevent the mixing of…

Q: Explain why an incompetent valve reduces the efficiencyof the heart contraction.

A: The organ of the mesodermal origin-the heart is primarily accountable for blood pumping. Repeated…

Q: Estimate the ejection fraction of the failing heart at a typical normal end-diastolic volume?

A: Ejection fraction estimation - It is the measurement of the amount of blood pump from left ventricle…

Q: Define Ventricular Fibrillation. Describe what is happening electrically during VF.

A: Arrhythmia is a rare condition in which the rate of the heartbeat becomes irregular. The heart…

Q: Which ion movement causes depolarization in the contractile cells of the heart? Ca++ leaving the…

A: The human heart is a muscular blood pumping organ made up of electrically excitable cardiac muscle…

Q: Describe the spread of excitation from the SA node through the restof the heart?

A: In the mammalian heart, the heartbeat originated from the cardiac muscles. The heartbeat originated…

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: Discuss the regulation of cardiac output during exercise.

A: The cells are the primary unit of life. The cells form the tissues which collectively form an organ.…

Q: Explain the structure of cardiac muscle and how it helps produce coordinated contraction in each…

A: Cardiomyocytes or cardiac muscle cells form a highly branched cellular network in the heart. They…

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

A: The heart is one of the vital organs of a human body. It is responsible for pumping blood through…

Q: During the Cardiac Contraction cycCle, EARLY ventricular systole is characterised by

A: ventricular systole- It is a phase of cardiac cycle in this the left and right ventricles contract…

Q: Summarize the effects of the autonomic nervous system on the heart.

A: The functioning of heart is controlled by Autonomic nervous system in many ways

Q: What would be the drawback of cardiac contractions being the same duration as skeletal muscle…

A: Cardiac muscles are specialized in the way that long action potentials are generated in the cardiac…

Q: High pressure in the systemic and pulmonary circuits often results in ventricular enlarges to pump…

A: PULMONARY CIRCUIT The blood pumped by right ventricles enters into the pulmonary artery The left…

Q: Diagram electrical conduction of the heart and discuss each component (SA node, AV node, etc).

A: Dear student, we are authorized to answer one question at a time. since you have not mentioned which…

Q: Describe the pacemaker potential and the myocardial action potential, and explain how the latter…

A: Heart is the major pumping organ in our circulatory system. It has two types of cells namely;…

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: The cardiac conduction system includes all of the following except:- a. the SA node. b. the AV node.…

A: Cardiac conduction system is made up of various muscles which send signals to the cardiac muscles…

Q: Describe the mechanisms that increase the cardiac output during exercise and that increase the rate…

A: When a person is exercising there are various circulatory changes that occur in his/her body. The…

Q: Describe the process of Contraction Coupling in the Cardiac Muscle?

A: Answer: Introduction: Cardiac muscle, comprised of the contractile cells of the heart, contain a…

Q: Describe the properties of the cardiac muscle, including automaticity, excitability, conductivity,…

A: Cardiac muscle or heart muscle is also known as myocardium. It is one of the three kinds of…

Q: What factors increaase the force of contraction of the heart and what factors decrease the force of…

A: Heart is one of the vital organs of a human body. It is responsible for pumping blood through the…

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: The cells of the myocardium behave as a single, coordinated unit called a Select one: О а. cardiac…

A: Cardiovascular system plays a vital role in the transport/supply of nutrients, gases and removal of…

Q: below. What can we learn from this experiment about the rhythmicity of our cardiac muscle? List…

A: Cardiac muscles are the specialised involuntary muscles observed around the heart and are…

Q: Describe the arrangement of cardiac muscle fibers.

A: BASIC INFORMATION MUSCLE It is a type of soft tissue which are found in most of the animals. The…

Q: Although not considered the primary pacemaker of the heart, the atrioventricular node can indeed be…

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

Q: We measured the stroke volume of the left ventricle. What was the average stroke volume of the rig|…

A: The term "cardiac output" (CO) is used to describe the amount of blood pumped up every minute by…

Q: Explain the intercellular structures of cardiac muscle.

A: Heart is a muscular organ that pumps blood throughout the circulatory system. It is situated between…

Q: Describe the structure of intercalated discs in cardiac musclecells, and briefly discuss their…

A: Cardiac muscle tissues are tissues of the heart and help to provide strength and flexibility from…

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: The entry of calcium into a ventricular muscle cell helps to maintain depolarization of the membrane…

A: A well-working conduction system generates a depolarization wave, which causes the atria and…

Q: Below are drawings of three different action potentials. Two of these occur in the heart, and one…

A: An action potential is a term that denotes the change in the resting membrane potential upon stimuli…

Q: During rest, an adult's heart rate averages 60-100 beats per minute. When exercising, an adult's…

A: Heart is the pumping organ of our body which pumps blood to the entire body. At resting condition,…

Q: Describe the conditions at the sarcolemma of cardiac muscle cells at rest.

A: They are connected by intercalated discs. These are striated fibres with a single nuclei. Sarcolemma…

Q: Discuss why the heart is called a double pump and compare the pulmonary and systemic circuits.

A: The human heart lies in the protective thorax, posterior to the sternum and coastal cartilage, and…

Q: Explain why it is more efficient for contraction of the ventricles to beginat the apex of the heart…

A: To answer this question we should have knowledge of Physiology.

Q: Discuss the importance of smooth muscle cells present in the aorta and all arteries.

A: Smooth muscle is employed in vessels to control blood pressure and flow in the cardiovascular…

Q: Calculate heart rate by counting the number of Large ecG Squares

A: The number of times a heart beats in a unit of time is called heart rate. Usually, it is measured as…

Q: Calculate cardiac output, given stroke volume and heart rate. Predict how changes in heart rate (HR)…

A:

Q: O the shutting of the heart valves

A: Option C . The shutting of heart valves

Q: how the two types of pumps used in the cardiopulmonary bypass work

A: Cardiopulmonary bypass contains two main elements such as the pump and the oxygenator that eliminate…

Q: Why must this change occur? (in reference to how does the heart rate differ before and after…

A: The process of circulation or internal transport is carried out by the pumping organ of the body,…

Q: Explain the mechanism of the contractions of the heart and how it is regulated?

A: The heart is a muscular organ that is divided into four chambers: Left auricle (LA), right auricle…

Hematology

Hematology is the branch of biology. Hematology is the medical field that deals with the treatment of blood disorders and cancers, such as hemophilia, leukemia, lymphoma, and sickle-cell anemia. Hematologists and hematopathologists are medical professionals who specialize in illnesses of the blood and its components.