Within the T-P interval of the EKG... a. The 2nd heart sound is heard b. the semilunar valves are open c. Ventricular pressure is higher than atrial pressure d. Ventricular cardiomyocytes are relaxed e. L-type calcium current is dominant in the ventricular cardiomyocytes

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: 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: 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: Match the following:   ? Prevents backflow into the left ventricle   ?  Prevents backflow into the…

A: Valves are flap like structures which are present in heart and helps in movement of blood in one…

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: 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: What event(s) occur during the QRS complex of an electrocardiogram? Select one: a. Repolarization…

A: The objective of the question is to identify the correct events that occur during the QRS complex of…

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: When the ventricular walls contract A.  the mitral valve opens, and the tricuspid valve closes. B.…

A: Introduction  Ventricles are the two lower chambers of the heart, located below the atria. The heart…

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: 1. Which phase of Ventricular Filling increases the volume of blood in the ventricles the most?…

A: The heart is a pump that transports blood through a network of arteries. Its function is to send…

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: Standing for a prolonged period of time can cause ... a. Decline in venous return  b. A drop in…

A: Venous return is the flow of blood from peripheral regions to back to right atrium . Factors which…

Q: a. Explain the difference in size and wall thickness of the ventricles. . b. Describe the function…

A: * The ventricles of the heart will have thicker walls than atria because blood is pumped out of…

Q: Which of the following is/are involved in regulating blood pressure? a. heart b. baroreceptors c.…

A: Blood Pressure can be defined as the pressure exerted by the blood flowing in the blood vessels on…

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: 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: cardiac output will increase by a. decreased blood volume and decrease of heart contractility b.…

A: When both ventricles ( left as well as right ) pump some amount of blood in a given time , it is…

Q: 17, The P-wave of the ECG is generated by the repolarization of the SA-Node.   A. trueB. false

A: The main function of the SA node is to act as the normal pacemaker of the heart. It initiates an…

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: It is generally accepted that a relatively low diastolic vascular pressure is more important than a…

A: Introduction The pressure of circulating blood against the walls of blood arteries is known as blood…

Q: Korotkoff sounds indicate:   A. Regurgitation from the ventricle into the atrium through a faulty…

A: The gold standard for non-invasive blood pressure measurement involves the utilization of the…

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

A:

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.