Which portion of the ECG corresponds torepolarization of the atria?a. P waveb. QRS complexc. T waved. none of the above: atrial repolarization is maskedby ventricular depolarization

Q: A patient is suffering from cardiac arrhythmias. They have atrial fibrillation. Describethe normal…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: When ventricular walls relax: a. Mitral valve opens & tricuspid valve closes b. Tricuspid valve…

A: Mitral valve is also called the bicuspid valve  and it connect left Atrium to the left ventricle.…

Q: Foreign proteins in the blood stimulate an immune response. Which of the following is true? Select…

A: Foreign proteins in the blood stimulate an immune response . Which of the following is true? Note:-…

Q: On an electrocardiogram (EKG), the electrical resetting of the ventricles is a. shown by the P wave…

A: An electrocardiogram (ECG or EKG) is a diagnostic test that measures the electrical activity of the…

Q: In hypothyroidism the cardiac system presents as follows:A. Decrease of ECG voltageB. Increase of…

A: Thyroid is an endocrine gland that releases the thyroid hormones, which is important for different…

Q: On an ECG, which of the following is generally produced from myocardial ischemia? Group of answer…

A: ECG is a diagnostic test known as Electrocardiogram which is used to check the heart's rhythm and…

Q: Which one of the following is a matching pair?  A Pulsation of the radial artery - values in…

A: Heart is the muscular organ in most animals that is involved in pumping blood through blood vessels.…

Q: Drugs that increase the heart rate have __________a effect.a. myogenicb. negative inotropicc.…

A: Answer is e.) positive chronotropic.

Q: a hypothetical disorder where a patient did not have an arterioventricular- bundle. As a result, the…

A: AV bundle also known as bundle of His. This is the only site where action potential can move from…

Q: an increase of which of the following will increase mean artrial pressure a. venous return b.…

A: The heart's role in any organism is to keep "blood" flowing continuously throughout the body. Blood…

Q: Explain in as much detail as you can:

A: Electrocardiogram is one of the most common &  usable instruments in biological studies. This…

Q: A person with a heart rate of 40 has no P waves but normal QRS complexes on the ECG. What is the…

A: Electrocardiogram(ECG) is the record or monitor of the electrical signals of the heart. Electrodes…

Q: In the normal EKG the QRS wave correlates with electricity present in which structure?…

A: To check for various cardiac diseases, an electrocardiogram (ECG or EKG) measures the electrical…

Q: Describe what is happening physiologically in each of the parts of the EKG listed:…

A: Hi! Thanks for your question. As you have posted multiple sub-parts we are answering only the first…

Q: During an electrocardiogram, the T-wave represents atrial depolarization. QRS complex represents…

A: Electrocardiogram (ECG) is a test that helps to assess the electrical activity of the heart. It…

Q: Diastole is associated with which of the following? a. The P wave of the ECG o b. Isovolumetric…

A: Heart is the part of circulatory sytem. It is responsible for pumping the blood to different parts…

Q: Left ventricular output is generally the same as right ventricular output. If right ventricular…

A: On an average, 70 ml of blood is pumped every beat (stroke volume) and about 5000 ml every minute…

Q: Cardiac contractility is enhanced by: A. Vagal stimulation. OB. Stimulation of Muscarinic receptors.…

A: Cardiac contractility is the heart's ability to pump blood around the body with force during systole…

Q: During the course of a physiology laboratory, a student finds that her PR interval is 0.24 second.…

A: An electrocardiogram is nothing, but a picture of the normal electrical heart conduction, and by…

Q: If damage to the AV node slowed down conduction through the heart, what would be observed on an ECG?…

A: An electrocardiogram or ECG is a graphical presentation of the electrical activity of the heart. It…

Q: The period during which a heart chamber is contracting is called _______ . The period during which…

A: Heart helps in the circulation of blood in the human body. It works like a pump. It is situated…

Q: An increase in TPR will lead to: A decreased afterload decreased stroke volume C decreased EDV D…

A: Total Peripheral Resistance (TPR) is the total resistance offered by the systemic circulation. It is…

Q: Ventricular relaxation immediately follows ________.a. atrial depolarizationb. ventricular…

A: The cardiac cycle is the duration of time that starts with atrial contraction and ends with…

Q: Referencing the ECG trace below, when would you expect the AV node to start depolarizing? P R T RR…

A: The atrioventricular (AV) node is a specialized structure in the heart that plays a vital role in…

Q: Which of the following terms best describes end diastolic volume? Answers A - D A The volume of…

A: The circulatory system of the human body consists of the heart the blood and the blood vessels that…

Q: The patient's ECG indicates that _____.   A action potentials are passing from his atria into his…

A: Electrocardiography -- The process by which electrocardiogram is done defined as electrocardiography…

Q: signal along nerves to the This node is located in the right atrium. An electrical signal is sent…

A: Introduction ECG, the electrocardiogram is medical equipment or device that measures the electrical…

Q: The sinoatrial node is also called the A. PacemakerB. Action potentialC. Resting membrane potent

A: Heart is an important organ that pumps blood. Heart is myogenic in nature meaning it is capable of…

Q: Give a term to describe the statement. All valves are closed and the volume of blood remains…

A: Cardiac cycle is the process of contraction and relaxation of cardiac muscle to pump the blood in…

Q: During the cardiac cycle shown in the graph above the ventricles eject _______ of the blood they…

A: The cardiovascular system consists of the heart and the blood vessels. The heart is the pumping…

Q: Prominent effect of the cardiovascular system in patient with hypercortisolism is:A. HypertensionB.…

A: Hypercortisolism is a rare endocrine disorder caused due to chronic exposure of body tissues to high…

Q: Why doesn’t blood volume change during isovolumetric ventricular systole?

A: Isovolumetric ventricular systole is the phase when the left ventricular phase rises above the…

Q: Arterial blood pressure is independent of A. Blood Volume B. Heart Rate C. Blood Viscosity D.…

A: Arterial blood pressure is the pressure found to be exerted by the blood flowing in our body against…

Q: Which of the following is not true about the resting Cardiac membrane potential? OA. The membrane…

A: Action potentials are the means of signal transmission generated and conducted by neurons in an…

Q: Which properties of the electrocardiogram are not true? O A. The P-Wave corresponds to excitation of…

A: Circulatory system is a type of body system which involves circulation of body fluids,…

Q: The maximum intraventricular pressure generated in the right ventricle is the same as the maximum…

A: The pressure inside the heart's ventricles is referred to as intraventricular pressure. The heart…

Q: When the SA node doesn’t function properly, the AV node takes over pacing the heart and produces…

A: In the ecg of the individuals with junctional rhythm , P waves is not seen . This is because the…

Q: Which of the following statements are TRUE? Increasing ventricular pressure increases ventricular…

A: Blood vessels are the way that bring blood during your body. They shape a closed loop, like a…

Q: Which of the following statements is correct: A rapid ejection occurs during early- ventricular…

A: A. A rapid ejection occurs during early-ventricular systole: This statement is incorrect. The rapid…

Q: In which phase of the ventricular muscle action potential is the potassium permeability the highest?…

A: The phase of the ventricular muscle action potential in which the potassium permeability is the…

Q: Let's review the electrical events that occur during a heartbeat. Match each phase of the ECG in the…

A: A. The atria depolarize ( P wave)B. The ventricles repolarize (T wave)C. (Diastolic interval; the…

Q: which of the following statements about the reentry phenomenon is correct? a. It can occur due to…

A: Re-entry phenomenon or re-entry ventricular arrhythmia is a type of paroxysmal tachycardia that…

Q: Considering the left ventricle, why does the ventricular volume have to decrease during ventricular…

A: Protruding of the mitral valve into the left atrium during isovolumetric contraction results in a…

Q: Action potentials in the ventricular cardiomyocytes differ from those in the SA node in that action…

A: Heart is the organ that pumps blood to all regions of the body. Muscles of the heart (cardiac…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.