All of the following are correct about the isovolumetric contraction, except  ____________.         A. This phase of the cardiac cycle begins with the appearance of the QRS complex of the ECG, which represents atrial repolarization and ventricular depolarization   B. It represents the time period between the closure of the AV valves and the opening of the aortic and pulmonic valves, ventricular pressure rises rapidly without a change in ventricular volume   C. The rate of pressure increase in the ventricles is determined by the rate of contraction of the muscle fibers, which is determine by mechanisms governing excitation-contraction coupling   D. Ventricular chamber geometry changes considerably as the heart becomes more spheroid in shape; circumference increases and atrial base-to-apex length increases

Q: Parasympathetic stimulation of the sinoatrial node ______.   A is necessary; without it the heart…

A: Parasympathetic system of the body is responsible for the body's rest and digestion response when…

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

A: Answer is e.) positive chronotropic.

Q: The return venous blood is aided by all of the factors except? ________.     A. pressure changes…

A: Venous return is defined as the rate at which blood is returned to heart.At steady state venous…

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

A: Electrocardiogram or ECG is the record or graphical registration of electrical activities of the…

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: Reduction in the lumen diameter of a blood vessel as the smooth muscle contracts is known as

A: The blood vessels are highly regulative structures that relax and contract whenever required to…

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: The cardiac cycle consists of a distinct relaxation andcontraction phase. Which term is typically…

A: The cardiac cycle is the process of contraction and relaxation of the heart. The primary function of…

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: Complete ventricular filling occurs during what phase of the cardiac cycle? a. when the atria are…

A: The heart is the part of circulatory system. It pumps blood to various parts of the body.

Q: At the time point indicated on the ECG ____.   A blood would be flowing from the ventricles into…

A: An electrocardiogram can be defined as the type of test in which the heart's electrical activity is…

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: Most blood enters the ventricle during ________.a. atrial systoleb. atrial diastolec. ventricular…

A: Each cardiac cycle comprises of a time duration starting with the contraction of atria and ending…

Q: he blood pressure in the left ventricle during systole is ______ the blood pressure in the right…

A: The blood pressure is the pressure of the blood within the arteries. It is produced primarily by the…

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: Cardiac action potentials have _________ duration than neuronal action potentials. A. a shorter…

A: Introduction Unlike the action potential in skeletal muscle cells, the cardiac nerve impulse isn't…

Q: Most blood flowing in all of the following arteries except the _____ is destined to circulate…

A: The fluids that are produced in the body and either circulated within the body or secreted out are…

Q: The cardiac plateau is mediated by ________ and it________ ventricular repolarization. Group of…

A: The cardiac plateau is a phase in the cardiac action potential. This phase is characterized by 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: 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: 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: Repolarization of ventricular myocardiocytes is caused by ______ the cells through voltage-gated…

A: Repolarisation is caused by the movement of positively charged k+ ions out of the cell. it initially…

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: The lining of the heart chambers is called the __________.   A endocardium   B myocardium   C…

A: The heart is the muscular organ that pumps blood throughout the body. It is made of cardiac muscle.…

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: The function of the right and left bundle branches is to _____.   A rapidly transmit action…

A: The atrioventricular bundle (bundle of His) is a continuation of the specialized tissue of the AV…

Q: An ectopic pacemaker refers to the condition in which _____.   A the rate at which the SA node…

A: An ectopic pacemaker refers to the condition in which the rate at which the SA node cells undergo…

Q: Cells of the sinoatrial node __________ during the pacemaker potential

A: SAN (sino-atrial node) is a compact mass or node of specialized cardiac muscle and is present in the…