The pacemaker cardiac muscle cells rely on for their action potentials.

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: 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: 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: Describe the structural and functional characteristics of cardiac muscle tissue and the cardiac…

A: the structural and functional characteristics of cardiac muscle tissue:

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: The capillaries of skeletal muscles are of the structural type called _____

A: Muscles are required in breathing, talking, running, walking, and anybody movement. Actin and…

Q: During the depolarization phase of the pacemaker potential O a. Ca+2 permeability increases O b. Na+…

A:

Q: During the systolic phase of the cardiac cycle, the heart is ________. a. contracting b. relaxing c.…

A: The heart is a pumping organ that provisions or supplies all tissues and organs of the body with…

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: Complete the sentence: ions initiate depolarization of cardiac muscle cells and ions are responsible…

A: Excitability is defined as the ability of the living tissue to give response to a stimulus. In all…

Q: Using the new cardiovascular drug Entresto, relate how the Cardiac action potential arriving at the…

A: Entresto is a brand-name prescription drug for treating specific forms of heart failure. Heart…

Q: This diagram shows a _______ and the green things being released into the space are _____. A.…

A: The branch of biology associated with studying the functions of living organisms’ body can be…

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: . Erythropoietin is available as a drug. Why would athletesabuse it?

A: Hormones are chemical messengers, that are mainly released by several glands. The hormones travel in…

Q: Why do the cardiac muscles cells demonstrateautorhythmicity?

A: Autorhythmicity is a property of specialized cardiac cells called pace maker cells that directly…

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: Conductivity of cardiac muscle cells: all channels involved in releasing ions into and out of the…

A: The conductivity of cardiac muscle cells:  The cardiac action potential is a brief change in voltage…

Q: Muscle is striated and not under voluntary control Cardiac Smooth Skeletal

A: Just like skeletal muscle, Cardiac muscle is also striated or striped. They are located in the…

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: 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: _____________________ is a peptide hormone released fromheart atrial cells in response to increased…

A: A hormone is a signalling molecule produced by glands that are secreted into the blood stream and…

Q: importance of smooth muscle cells present in all arteries

A: Introduction: There are three types of muscles: skeletal, smooth, and cardiac muscles. The skeletal…

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: Compare and contrast the action potential of a myocardial conductive cell and the action potential…

A: Myocardial conductive cell: [action potential] The conductive cells within the heart establish the…

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: Draw and label channel of events of the myocardial action potential with correct axis and units.…

A: The cardiac action potential is a slight change in membrane potential experienced by the cells of…

Q: arteries when your heart * contracts (beats)

A: Top number or Systolic pressure is the pressure inside the arteries when the heart contracts and…

Q: The role of calcium currents in cardiac contractile cells is to .  The role of calcium currents in…

A: A neuromuscular junction is a biochemical synapse between muscle fiber and a motor neuron. It…

Q: importance of smooth muscle cells present in the aorta

A: Introduction :- Smooth muscle cells (SMCs) are non-striated, involuntary muscle cells that line the…

Q: The contracting cells of the heart are a type of striated muscle that is said to work as a…

A: Functional syncytium is a group of cells that acts or works as a single unit while keeping the…

Q: The marks a spot of dead myocardial cells. How does this change the depolarization and muscle…

A: Myocardial cells myocardial cells are located in the heart forming a branched network in the heart,…

Q: Cardiac myocytes are mechanically connected via O Gap junctions O Autorhythmic cells O Purkinje…

A: Cardiomyocytes:               The cells responsible for generating contractile force in the intact…

Q: Closer to the heart, arteries would be expected to have ahigher percentage of ________. a.…

A: Vascular system can be divided into two segments, pulmonary vascular system, and systemic vascular…

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: Cardiac muscles differ from skeletal muscles in that they ________.

A: Cardiac muscles are different from skeletal muscles in different aspects, cardiac muscles are…

Q: sub endothelium collagen play .32 role in thrombus formation TO

A: A condition that includes lodging of blood clots that results in the blockage of veins or arteries…

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

A:

Q: Cardiac muscles differ from skeletal muscles in that they

A: We know that cardiac muscles are involuntary muscles whereas skeletal is voluntary which requires…

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: Role cardioregulatory centers play in regulating heart rate

A: Cardio regulatory center is a part of brain that found in the medulla oblongata. It is responsible…

Q: Coordinated contractions of cardiac muscle are controlled by pacemaker cells, allow for your heart…

A: The pacemaker cells or SA node generate slow positive increase in voltage across the cells membrane…

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: _____________ is a peptide hormone released by heart atrial cells in response to increased blood…

A: Peptide hormone is the type of hormone which consists of a longer amino acid chain or proteins.…