Describe the action potential of an autorhythmic cell in the heart. a) Indicate how the opening and closing of each ion channel affects the membrane potential of the cell. b) Provide one similarity between the action potential of an autorhythmic cell and the action potential of a neuron. c) Provide one difference between the action potential of an autorhythmic cell and the action potential of a neuron.

Q: Why do we need to prevent the decompensated state in patients with heart failure?

A: Decompensation is any functional decline of a system or structure which was operating earlier with…

Q: 106 Depolarization (phase 0) of cardiac pacemaker cells is slower than that of ventricular myocytes…

A: Electrochemical potential gradient across the cellular membrane enables the cardiac cells to…

Q: Contractile force generated by cardiac myocytes is regulated by input from the autonomic nervous…

A: Heart is a conical muscular organ that contracts and pumps blood into the circulation. To function…

Q: 8) Which is correct with an increase in cardiac output? A) decrease in stroke volume B) increase in…

A: In cardiac physiology, Cardiac output refers to the amount of blood pumped out of each ventricle per…

Q: 17. a) Define a premature ventricular contraction (PVC). b) What are the distinguishing…

A: Arrhythmia or irregular heartbeat refers to the disorder in which the rate or rhythm of the heart is…

Q: 117. A 45-year-old man with severe tricuspid valve prolapse undergoes a valve replacement operation.…

A:

Q: Answer the following showing your work: a) If the attenuation coefficient of the heart muscle anm…

A: The attenuation coefficient is a measurement of how easily an incident energy beam can permeate a…

Q: Subject: Neurophysiology  Many people thought that the inwardly rectifying K+ channel allows K to…

A: Movement of ions through specific ion channels in the membranes of specialized cells like the…

Q: which of the following is the pacemaker of the heart?

A: Heart  Heart is the pumping organ of animals it is made up of cardiac muscles. The heart of human…

Q: Excess extracellular potassium functions to: (A) decrease the resting membrane potential of the…

A: The heart is part of the cardiovascular system that helps in transportation of blood. Deoxygenated…

Q: If blood pressure was to drop, how is the signal transmitted to the central nervous system?   a)…

A: Introduction Blood pressure is the pressure of blood pushing against the walls of our arteries. Our…

Q: 70. Which of the following phases of the ventricular action potential most closely coincides with…

A: The electrocardiogram is a graphic representation of the electrical activity of the heart recorded…

Q: Medical evidence shows that a small change in the radius of an artery can indicate a large change in…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: if a drug blocked the receptor of epinephrine/nonrepinepherine on the heart, which would occur?

A: There is a lot of overlap between epinephrine and norepinephrine. Catecholamines are a tiny but…

Q: In your study of neuron physiology, you learned that depolarization is dependent on the sodium entry…

A: Heart can initiate contractions on its own by SA node (Sinoatrial node). It doesn't need external…

Q: 6. Which of the following statements concerning the differences between action potentials in…

A: From the given options, (B) is the correct answer.

Q: In the negative feedback loop of blood pressure regulation, which of the following would be the…

A: Negative feedback is referred to as one of the systems utilized by the body in order to maintain…

Q: Explain two reasons why the heart is referred to as a double pump.

A: The circulatory system consists of the heart, the blood vessels and the blood. The heart is the…

Q: 59. A 20-year-old woman is participating in a study of skeletal muscle blood flow during dynamic…

A: The answe will be  D) immediately after S2

Q: Which of the following statements regarding heart valves is NOT true? a) They are flaplike…

A: The circulatory system's main organ is the heart. Actually, it serves as two distinct pumps. Blood…

Q: Briefly define 1) Starling’s Law of the heart, 2) the basic cellular mechanism thought to mediate…

A: Introduction: When at rest, the heart pumps between 4 and 6 liters of blood every minute. During…

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: Briefly explain the following: 1) Effect of Potassium ions on heart Function. 2) Effect of Calcium…

A: Introduction: The cardiovascular system comprises the heart and the blood vessels (arteries and…

Q: Which of the following ions are involved in cardiac conduction?  1) Calcium  2) Magnesium…

A: The ions involved in cardiac conduction are  Sodium, Calcium and Potassium. Cardiac conduction can…

Q: Throughout the development of prosthetic heart valves, how might application of nanotechnology be…

A: Nano-technologists have gotten engaged with regenerative medicine through making of bio-materials…

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: 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: 6. The diagram shows stroke volume as a function of right atrial pressure. The solid curve shows…

A:

Q: If an individual has a heart rate of 80 bpm; end diastolic volume of 140 ml and end systolic volume…

A: The functions of heart can be assessed by measuring and calculating certain parameters and comparing…

Q: 16) In what situation would a beta blocker be INDICATED? A) Hypertension B) Hypotension C)…

A: Beta blockers are the class of drug that are used in the case of arrhythmia, chest pain, heart…

Q: list in sequence the components of the elctrical conducting system of the human heart

A: A pump of muscle tissue consists of a heart and a supply of energy and oxygen is required for the…

Q: This is the sound a heart makes when beating: A) lub-dubB) swish-fashC) ding-dong

A: The heart is a muscular organ which pumps blood through the blood vessels of the circulatory system.…

Q: Pick all the correct answers for the normal physiological compensatory responses in untreated…

A: Congestive heart failure may occur when the heart is unable to pump the blood, the way it should.…

Q: Based on Starling’s Law, how would increased blood flow to the heart during diastole (remember, this…

A: The cardiovascular system is one of the 11 major body organ systems that is concerned with the…

Q: During isovolumetric ventricular contraction: a) all valves are open and pressure within the…

A: The term isovolumetric contraction includes the prefix word ‘iso’ which means ‘equal’. So, the word…

Q: Electrophoretic flow and electroosmotic flow (EOF) plays an important role in capillary…

A: Since there are multiple questions in this particular question, I will answer the first one for you.…

Q: What does the circled structure do?

A: Heart Mesodermally derived organ, is situated in the thoracic cavity between the lungs, slightly…

Q: What does the circled structure do? A) signal SA node contraction B) serve as the hearts pacemaker…

A: Human heart is myogenic that means it can generates it's own impulse for the contraction. The…

Q: Roberto is a 78-year-old male who has recently been diagnosed with Class III Congestive Heart…

A: Congestive heart failure refers to the loss of pumping efficiency of the heart.  Due to the low…

Q: xamine one of the consequences of branching with a simple model shown in the figure. Assume that…

A: Assume that the resistance is R    So the resistance in the parallel 1Ro=1R+1R…

Q: While downhill skiing, Jerry lost control and appeared to hit into a tree, chest first. The ski…

A: CYANOSIS- It is a blue colouration of skin and mucous due to insuffecient oxygen and more carbon di…

Q: If all plasma membrane Ca21 channels in contractile cardiac muscle cells were blocked with a drug,…

A: A heart muscle cell is similar to a large house with several doors and rooms. Ion channels are…