Which point on the PV loop corresponds to the opening and closing, respectively of the aortic valve? 200- 180 160 140 120 D 100 80 60 40 20 B 20 40 60 80 100 120 140 160 180 200 Left ventricular Volume (mL) A. A and B, respectively B. A and C, respectively C. C and B, respectively D. D and B, respectively E. C and E, respectively Left Ventricular Pressure (mm Hg)

Q: The second heart sound ("dub") results from vibrations generated by the A. closing of the AV valves…

A: A normal heartbeat consists of two sounds- LUB and DUB. These sounds often occur as pairs in a…

Q: In a blood pressure measurement of 110/70, the number70 is the ________.a. systolic pressureb.…

A: Answer is b.)  diastolic pressure.

Q: When is the blood pressure in the left ventricle greater than the blood pressure in the aorta?   A…

A: Cardiac cycle is a cycle through which atrial contraction ends with  ventricular relaxation. When…

Q: Complete the following table. Valve Aortic valve Bicuspid valve Pulmonary valve Tricuspid valve…

A: The heart is a muscular organ that pumps blood throughout the body. It has four chambers: two atria…

Q: Which of the following would you expect to increase systolic blood pressure? Group of answer…

A: Systolic Blood Pressure is the top number which measures the force that heart exerts on the walls of…

Q: In the Sino-Atrial Node which is not true? O A. Shows spontaneous (oscillatory) electrical behavior.…

A: The SA node, which is commonly known as the pacemaker is a half moon like cluster of  myocytes…

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

A:

Q: Choose the best answer Blood moving from the left atrium to the left ventricle passesthrough which…

A: Heart is the main organ pumping blood. Heart is myogenic meaning it is capable of auto excitation.…

Q: The isovolumetric contraction in ventricles appears:

A: Isovolumetric contraction in general means that although contraction takes place in the ventricles,…

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: A. What could be the implicatiosn for the atrial and ventricular contraction-relaxation? B. Draw…

A: If the pacemaker activity in the atrioventricular (AV) node overtakes the sinus node (SA node)…

Q: 1. The source of the electrical currents that you measured on the skin throughout a normal…

A: Note: According to the given guidelines, we are supposed to answer only one question (1st question).…

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: Which of the following channels are involved in the action potential in contractile cells of the…

A: An action potential is a sudden, fast, transitory, and propagating shift in the resting membrane…

Q: Which combination of vessels has the most resistance to blood flow: O A. A single 2 Cm long artery…

A: Blood vessels are of 3 types namely1.Arteries2.Veins3.Capillaries Each blood vessel has a unique…

Q: By increasing diameter of vessel: a. The resistance will decrease while the blood flow will…

A: Blood flow  refers to the development of blood through a vessel, tissue, or organ, and is ordinarily…

Q: Acclimatization at high altitude would include a.increased in contractility of heart and increased…

A: Acclimatization, also known as acclimation or acclimatisation, is the process by which an individual…

Q: During diastole the blood pressure in the left ventricle is _______.   A lower than the pressure in…

A: The heart is a highly muscularized, involuntary organ of the body. It has four chambers consisting…

Q: A person with a systolic blood pressureof 130 mm Hg and a diastolic pressureof 85 mm Hg would have a…

A: Mean arterial pressure is the average blood pressure in the arteries of a person during one cardiac…

Q: If the S-A node discharges at 0.00 seconds, when will the action potential arrive at ventricular…

A: The objective of this question is to determine the time it takes for an action potential to travel…

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: The pausing of electrical conduction at the AV node is critical to heart function because O ATP…

A: AV mode, also known as atrioventricular mode, refers to the electrical conduction pathway that…

Q: 200 Curve 1 175 Curve 2 150 125 Curve 3 100 75 50 25 50 100 150 200 250 300 350 400 LV End Diastolic…

A: The cardiac cycle is the series of events that occurs in the blood-pumping organ, the heart. A…

Q: Choose the option correct asap

A: We know that Blood flow is illustrated as the movement of blood via an organ, vessel, or tissue.…

Q: Cardiac arrhythmias are characterized by all of the following except A. Changes in the heart rate…

A: cardiac arrhythmias cause the heart to beat irregularly, too slowly, or too fast. Arrhythmia is…

Q: Robert was tasked to present his findings after a day's field work assigned forest plots. He could…

A: The given situation is " Robert was tasked to present his findings after a day's field work assigned…

Q: ne symptom of right ventricular failure would be _____.   A difficulty breathing when lying in the…

A: The right ventricle moves deoxygenated blood from the heart back to the lungs to be resupplied with…

Q: Choose the pathology, where is observed shortening of PQ interval in ECG, increasing of cardiac…

A: ECG is the electrocardiogram . It is used to check the heart rhythm and electrical activity. It is a…

Q: The greater the compliance the Select one: a. greater the resistance generated in the vessel. b.…

A: The question is asking about the relationship between the compliance of a blood vessel and various…

Q: Both atria are in contraction and both ventricles are still in diastole during: O a. T-P segment. O…

A: The period when the contraction of the atria starts that ultimately leads to ventricular relaxation…

Q: In a patient with _______ some of the oxygenated blood returning to the left atrium would be pumped…

A: The blood enters the heart's right atrium from the body, where it moves to the right ventricle and…

Q: The sinoatrial node sets the pace for the heart as a whole because sinoatrial node cells _____.   A…

A: The human heart is located in the mediastinum (It is the central place in the chest or thoracic…

Q: Which is not true of Re-entrant Arrhythmias OA. Occurs when there is a "loop" of self excitation. B.…

A: An electrical impulse in the heart that follows a circular course, or re-entrant circuit as opposed…

Q: The maximum heart rate of a 45-year-old person is A. 155 beats/min B. 165 beats/min C. 175…

A: The heart rate refers to the rate at which the heartbeats. The heart rate in the normal resting…

Q: Which portion of the ECG corresponds torepolarization of the atria?a. P waveb. QRS complexc. T…

A: The cardiac action potential refers to a brief variation in the membrane potential through the cell…

Q: When measuring the blood pressure in the cutoff method, diastolic pressure of (for example 80 mmHg)…

A: Blood pressure can be defined as the pressure that is exerted by the flowing liquid (blood) on the…

Q: Which of these pt with elevation observed in the ST segments of a 12 lead monitor would benefit the…

A: The 12-lead ECG's ST segment elevation may signal a myocardial infarction (heart attack) or other…

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.