Which of the following will cause an increase in EDV? A increased venous return В stronger atrial contraction C increased ventricular contractility D all of the above E A and B

Q: QUESTION 4 In the presence of ventricular septal defects, a left-to-right cardiac shunt indicates…

A: During fetal stages, the heart develops from a large tube which then divides into different…

Q: Absent "P" waves in a junctional arrhythmia indicate: O A. Retrograde atrial deplorization occurs at…

A: In a normal sinus rhythm the electrical impulse startsin the sinoatrial node. which formulates P…

Q: In the following graph, curve (line) N represents a vascular function curve (venous return curve) in…

A: Introduction :- Venous return is the flow of blood from the periphery back to the right atrium, 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: 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: 45. Which of the following is/are true concerning the opening and closing of thecardiac valves?   A.…

A: The valves of the heart maintain undirectional flow of the blood and prevent its regurgitation in…

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: Which of the following conditions might result in the back flow of blood through a weakened mitral…

A: a. High pressure in the left ventricle, low pressure in the left atrium

Q: A patient is admitted to the ER complaining of chest pains and difficulty breathing. He states that…

A: Myocardial infarction This is called heart attack occurs when one or more regions of the heart…

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: 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: 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 atrioventricular valves open because ______.   A relaxation of the ventricles causes the…

A: Atrioventricular valves These are the valves which connect the atrium to the ventricles. There are…

Q: The force the ventricles must work against to pump blood is called A. Myocardial contractility B.…

A: The heart has four chambers, the above two chambers are known as the atrium, and the below two…

Q: Which of the following is true about the pacemaker potential in the heart? a. Decreased K+ efflux…

A: The pacemaker potential, also known as the prepotential, is the slow, positive increase in voltage…

Q: In discussing the cardiac cycle; all are correct except A. Diastole is also known as relaxation B.…

A: The heart is a muscular organ that pumps blood throughout the body. The heart has mainly four…

Q: 6. During which part of the EKG does each event occur? (Be as specific as possible.) Use this…

A: Electrical currents that may be measured at the skin's surface are created by action potentials that…

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: Which point on the PV loop corresponds to the opening and closing, respectively of the aortic valve?…

A: Introduction :  PV loop derived from pressure and volume data found from cardiac cycle. If left…

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…

Q: 24 25 26 27 28 29 30 31 32 33 Figure 10.2. Heart, Internal 34 35 Figure 10.2 36 A. Aortic valve B.…

A: Heart is chief organ of circulatory system which consists of 4 chamber . These chambers are :-  A )…

Q: All of the following are true of the anatomy of the heart except A. The epicardium has a serous…

A: The heart is a muscular organ that pumps oxygenated blood to the aorta, which conveys it to the…

Q: During atrial fibrillation: O A. The EKG shows no discernable P wave. O B. There is a noticeable…

A: Human heart consists of four chambers: two atria and two ventricles. The left atria receive…

Q: which of the following mechanisms contributes most to the deterioration of myocardial perfusion in…

A: The mechanism that contributes most to the deterioration of myocardial perfusion in patients with a…

Q: Which of the following is true regarding the conduction of electrical activity in the heart? Choose…

A: The objective of the question is to identify the correct statement about the conduction of…

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: How much blood passes from the left ventricle into the aorta during diastole?   A none; during…

A: Each cardiac cycle has a diastolic phase where the heart chamber is in a state of relaxation and…

Q: What is the cardiac output of a heart when the heartbeat rate is 60 beat.min-1, the diastolic…

A: Cardiac output: Amount of blood pumped by the heart per minute  Strove volume :  amount of blood…

Q: During the period of isovolumic contraction: A. the AV-valves are open and the aortic & pulmonary…

A:

Q: The Frank-Starling Law says that stroke volume a. is constant b. increases with deceased blood…

A: Stroke volume refers to the amount of blood ejected by the left ventricle of the heart in a single…

Q: In ventricular fibrillation, there is no pattern visible in the EKG. What does this mean in terms of…

A: Venticular fibrillation produces irregular electrical signals in the muscles of the ventricles .

Q: A patient has been in a serious car accident and is hemorrhaging. Which of the following changes…

A: The heart is a muscular, mesodermally derived organ. It pumps the blood and circulates it in the…

Q: Heart failure occurs when   a. the cardiac output is 15 liters per minute when you are watching…

A: A heart failure means that the heart muscle doesn't actually  pump as much blood as per  body…

Q: Which of the following is true of the EKG?   A. Depolarization of the atria cannot be seen on the…

A: Electrocardiograms represent the graphical activity of the heart. It shows the graphical…

Q: The period between the filling of the ventricles and the opening of the semilunar valves in the…

A: The cardiac cycle is a period from the beginning of one heartbeat to the beginning of the next…

Q: Which of the following is/are true concerning the opening and closing of the cardiac valves? A.…

A: Backward blood flow is prevented by the valves. On each end of the two ventricles are flaps that act…

Q: A PR interval of less than 0.12 seconds indicates that the pacemaker site of the P wave is in the:…

A: The objective of the question is to identify the location of the pacemaker site of the P wave in the…

Q: Which of the following statements about resting heartrate is true?   A it is highest in elderly…

A: Resting heart rate is defined as the heart pumping the lowest amount of blood a body needs when the…

Q: Blood flow through capillaries in the walls of the left ventricle is ______.   A unnecessary…

A: The blood circulating through the circulatory system is responsible for the transport of oxygen and…

Q: Cutaneous vasoconstriction is caused by an increase in which of the following? A. Anaerobic…

A: Introduction:-  Cutaneous vasoconstriction is the narrowing of the blood vessels in the skin, which…

Q: The pericardial cavity contains _____.   A blood vessels supplying the heart muscle and adipose…

A: Anatomically, pericardial cavity is the physical space between visceral and parietal layers of…

Q: In a healthy resting person, the left side of the heart most likely resembles the right side of the…

A: Introduction: The right side of the heart has to pump the blood into the lungs to get it originated…