Q: In what ways are autorhythmic fibers similar to and diff erent from contractile fibers?
A: Heart is a four chambered cardiovascular organ pumping blood throughout the body. The auricles and…
Q: What are Cardiac Action Potentials?
A: Unlike the action potential in skeletal muscle cells, the cardiac nerve impulse isn't initiated by…
Q: What happens to the heart rate and cardiac output during exercise?
A: Heart rate and cardiac output are two key indicators of cardiovascular health. Heart rate, or the…
Q: What is the difference between an endocrine and exocrine gland? Differences between cartilage and…
A: Introduction : Muscular tissue is a type of tissue that aids in muscle contraction. By exerting…
Q: Describe the process of Excitation–contraction coupling in cardiac muscle?
A: Excitation contraction is a process through which an action potential (electric stimulus) from the…
Q: As a result of the long refractory period in the contractile cell refractory period, cardiac muscle…
A: Muscles perform various functions as movement, which is the fundamental purpose of muscles is to…
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: 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: What initiates action potentials in cardiac muscle?
A: Generation of action potential activates the neuron during the generation of stimuli. It is studied…
Q: Why does increasing EDV increase contractility?
A: The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the…
Q: what is contraction in cardiac muscle cells in response to
A: Muscle cells are the cells also known as myocytes that help in the formation of muscle tissues. The…
Q: Why should mitochondria be larger and more abundant in cardiac muscle than in skeletal muscle?
A: The Muscle is a soft tissue that contains actin and myosin protein filament that are responsible for…
Q: Describe the histology of cardiac muscle tissue, and differentiate ?it from that of skeletal muscle?
A: BASIC INFORMATION MUSCLE It is a type of soft tissue which are found in most of the animals. The…
Q: What are the uses of cardiac troponins?
A: Troponins are a group of protein molecules that are found in skeletal and cardiac muscles. The…
Q: Discuss how the SA and AV nodes control the contractionsof the heart muscle, as well as how these…
A: A network of specialized muscle cells is present in the walls of the heart. These muscle cells are…
Q: Why do the cardiac muscles cells demonstrateautorhythmicity?
A: Autorhythmicity is a property of specialized cardiac cells called pace maker cells that directly…
Q: State some unique features of cardiac muscles.
A: Muscle is a soft tissue found in most animals. Muscles function to produce force and motion. There…
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: 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: 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: What are the two functional importances of the intercalated discs of cardiac muscle?
A: The intercalated discs are a specific feature of cardiac muscle fiber where it supports synchronized…
Q: Why is the plateau phase so critical to cardiac musclefunction?
A: The heart is a hollow muscular organ. It pumps the blood through the blood vessels of the…
Q: A drug is found to partially inactivate fast sodium channels. Mow would this drug change the action…
A: Given: To find a drug that partially inactivate fast sodium channels. How it change the action…
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: 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…
Q: What is the relationship between cardiac output and venous return in the steady state?
A: Cardiac output is the amount of blood pumped into the aorta by the heart per minute, and it is…
Q: Given the functions of the cardiovascular and respiratory systems, why would heart rate and…
A: Both the system( cardiovascular and respiratory) functions together to match the oxygen demands of…
Q: If an individual had a disease that reduced the strength of cardiac muscle contraction, what aspect…
A: In vertebrates, cardiac muscle, also known as myocardium, is one of three major muscle groups found…
Q: Where are cardiac muscle cells found in the heart? O myocardium O pericardium O endocardium O great…
A: The heart is the main organ of the circulatory system of the body. It is located behind the…
Q: Discuss that Can cardiac muscle exhibits (normally or under experimental conditions) summation or…
A: Cardiac muscles are defined as the group of involuntary muscles present in the heart. These muscles…
Q: how do gap junction and intercalated disks aids contraction of heart?
A: Cardiac muscle tissues are only limited to the heart. The contractions of the cardiac muscles are…
Q: Knowing that a patient with chronic heart failure is using digoxin (digitalis) for more than 1 year,…
A: Digoxin is a medication that is commonly used to treat a variety of different heart conditions, such…
Q: What type of cardiac rhythm is this??
A: Electrocardiogram (ECG): This is a simple test. this test can be used to check: -Heart's rhythm…
Q: What are three anatomic or physiologic differences between skeletal muscle and cardiac muscle?
A: The biological level of the organization is a hierarchy in which the living thing and structures are…
Q: How are action potentials generated and conducted in myocardial and pacemaker cells?
A: The cardiac conduction system includes special muscle fibers.
Q: Does the right ventricular stroke work index (RVSWI) measure the amount of work required by the…
A: Right ventricle is one of the four chambers of the heart which receives deoxygenated blood from the…
Q: During exercise, activation of alpha-adrenergic receptors in skeletal muscle arterioles: A)is…
A: *There are three types of adrenergic receptors are present alpha beta-1 beta-2 *Alpha receptors…
Q: In which direction does Ca2+ move in response to the opening of voltage-gated Ca2+ channels: into or…
A: Voltage-gated ion channels are a type of transmembrane protein that forms ion channels that are…
Q: What is the significance of the extended refractory period in cardiac muscle?
A: Cardiac muscle contraction is a type of electrical event that begins at the sinoatrial node. As a…
How does excitation–contraction coupling in cardiac muscle resemble that of skeletal muscle? How is it different?
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- Knowing that a patient with chronic heart failure is using digoxin (digitalis) for more than 1 year, what effect has this treatment on the distribution of ions across the membrane of cardiac muscle cells? What is effect will be of digitalis on cardiac contractility? What is an inotropic effect? How does digitalis help to treat patients with heart failure?Can cardiac muscle exhibit (normally or under experimental conditions) summation or complete tetanus as does skeletal muscle? Why not? (highlight the main answer)The entry of calcium into a ventricular muscle cell helps to maintain depolarization of the membrane during the plateau phase of the action potential, but this calcium also performs what other function?