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: What are Cardiac Action Potentials?
A: Unlike the action potential in skeletal muscle cells, the cardiac nerve impulse isn't initiated by…
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: How is heart contractiontriggered?
A: The heart is a muscular organ, which pumps blood throughout the body. It is located in the middle…
Q: What is ventricular fibrillation?
A: The heart is a muscular organ that is divided into the left and right sides to prevent the mixing of…
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 is the effect of High Altitude on the Cardiopulmonary System?
A: Airways, railways, highways, and canals are the world's human and commodities transportation…
Q: What is Preload and Afterload in the cardiac output of a human heart?
A: Preload is the initial stretching of the cardiac myocytes (muscle cells) prior to contraction. It is…
Q: Describe the types and significance of intercellular junctions between cardiac muscle cell?
A: Cardiac muscle helps to contract the heart. There are 3 types of intercellular junction between 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: Describe the functional significance of the skeletal muscle pump and illustrate the action ofvenous…
A: Blood is a type of connective tissue that helps in circulating oxygen and nutrient throughout the…
Q: What major movements of ions account for each phase of the action potential of a typical myocardial…
A: Action potential The rapid rise in the voltage of the membrane potential across the cellular…
Q: Action potentials are spread rapidly between cardiac muscle cells by a. sarcomeres. b. intercalated…
A: An action potential is a way by which a neuron transports electrical signals.
Q: The pacemaker cardiac muscle cells rely on for their action potentials.
A: Cardiac muscles are found in the heart. They are auto excitable. Cardiac muscles are striated,…
Q: What is the ejection fraction of the heart, and which amount of ejection friction is considered…
A: Heart is vital circulatory organ found in vertebrates and some of invertebrates. This essential…
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: What are the Effects of sympathetic nerves and plasma epinephrine on the arterioles in skeletal…
A: Central nervous system (CNS), and the peripheral nervous system (PNS) are two main parts of the…
Q: How does excitation–contraction coupling in cardiac muscle resemble that of skeletal muscle? How is…
A: The calcium ions channels present in the plasma film are momentarily opened because of the…
Q: What is the role of Ca2+ in the shape and duration of an action potential. (Cardiac muscle cell)
A: The duration of an action potential for cardiac muscle cell is between 200-250 milliseconds. There…
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: Define joint diastole. What are the constituents of the conducting system of human heart?
A: Cardiac cycle is defined as the period between the beginnings of one heartbeat to the beginning of…
Q: define Cardiac muscle,
A: Muscle is a soft tissue which is found in most animals. The tissues comprise muscle fibre called…
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: 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: How does the depolarization of pacemaker cells differfrom the depolarization of other cardiac cells?…
A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…
Q: How do blood volume and venous tone affect cardiacoutput?
A: The heart pumps the blood, and the amount of blood that is pumped by it within one minute through…
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: Which organs have an increased proportion of cardiac output during exercise? Which receive a…
A: Cardiac output is also called heart output. It describes the blood volume being pumped by the heart…
Q: Why is Sinus bradycardia often normal in athletes?
A: The average heart beat of a human at rest is about 60-100 beats per minute(bpm). Bradycardia is a…
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: How are preload, afterload, and contractility managed therapeutically in the patient with heart…
A: Heart failure is characterized by the heart’s inability to pump an adequate supply of blood to the…
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: What is cardiovascular mechanics and why is it relevant ?
A: Circulatory system plays the very important role of delivering nutrients and oxygen to the cell and…
Q: Which of the following characteristics is NOT a property of cardiac muscles? Group of answer choices…
A: Our body consists of three types of muscles Smooth muscles, skeletal muscles, and Cardiac muscles.…
Q: What is stroke volume? What is its relation will cardiac output ?
A: The value obtained from the subtraction of end-diastolic volume and end-systolic volume refers to…
Q: How much of the total cardiac output may increase during the performance of heavy exercise?
A: The word "cardiac output" refers to the amount of blood pumped by the heart every minute. The…
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…
Q: How do heart rate, preload, afterload, and contractility affect cardiac output and cardiac workload?
A: The cardiovascular framework circulates blood all through the body in order to supply oxygen and…
Q: How is Cardiac Index?
A: Cardiac index (CI) is the amount of blood pumped from the left ventricle per minute per unit body…
What are the two functional importances of the intercalated discs of cardiac muscle?
The intercalated discs are a specific feature of cardiac muscle fiber where it supports synchronized contraction of cardiac tissue. It is made up of three types of cell junctions and is found at the Z-line of the sarcomere.
Step by step
Solved in 2 steps
- By what mechanism does the autonomic nervous system impact the contractions of cardiac muscle?What is the name of the blood vessel that supply cardiac muscle with oxygenated blood?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?