An individual presents with cardiac tamponade.  Their heart would be the most efficient in pumping out blood during which of the following?

Q: Rank the movements of blood through the heart described below at left according to the magnitude…

A: The electrical impulses from the sinoatrial (SA) and atrioventricular (AV) nodes, which make up the…

Q: A patient has tachycardia. Would you recommend a drug that prolongsor shortens the plateau of…

A: Tachycardia is a condition that makes our heart beat more than 100 times per minute. There are three…

Q: stroke volume, end systolic volume, end diastolic volume, resistance, venous return, mean arterial…

A: Cardiac output is the volume of blood being pumped by the heart, by the left and right ventricle,…

Q: The goal of management of the person with an acute myocardial infarction is t0 preserve the…

A: The myocardium is the muscular middle layer of the heart's wall, situated between the outer…

Q: Which ion movement causes depolarization in the contractile cells of the heart? Ca++ leaving the…

A: The human heart is a muscular blood pumping organ made up of electrically excitable cardiac muscle…

Q: Consider the equation cardiac output (CO) = stroke volume (SV) X heart rate Which of the following…

A: Afterload is the pressure the heart must work against to eject blood during systole. When…

Q: Atrial fibrillation (AF) is a rapid and unorganized beating of the upper chambers of the heart.  It…

A: If the hazard ratio is 0.60, the likelihood of surviving one day with this diagnosis is 99.4%, the…

Q: cardiac cycle includes all the events associated with the flow of blood thre heart during a single…

A: Heart consists of four chambers, two upper chambers called atrium. and two lower ventricles. All…

Q: Slow conduction in the atrioventricular node is associated with which of the following? Group of…

A: An atrioventricular nodal conduction delay can occur in a few disorders and may result in a delay in…

Q: Identify and describe the size, shape, and location of the heart and the path of blood through the…

A: The cardiovascular system is one of the 11 major body organ systems that is concerned with the…

Q: Explain the electrical and mechanical events in the cardiac cycle, including their relationship to…

A: The sequence of events performed by the heart from one heartbeat to the commencement of next is…

Q: Leaky Na+ channels in the cells of the SA Node do which of the following?   a-allow a slow…

A: d-allow a slow depolarization that eventually reaches the threshold for voltage-gated Ca2+ channels.

Q: Based on the concentration gradient of sodium, potassium, and calcium in cardiac myocytes, which of…

A: In a cell, the plasma membrane separates the internal environment (cytoplasm) from the external…

Q: Autorhythmic cells in the SA node intrinsically fire at a rate of 90 action potentials per minute.…

A: The heart is a major muscular organ of the cardiovascular system that is responsible for pumping the…

Q: Automaticity of the heart is the result of: Group of answer choices K+ leaking into the cell. Na+…

A: Automaticity of the heart is the result of:The answer is: more than one of the above.The Heart's…

Q: ich of the following is an accurate descriptione d the subsequent (second) P wave (second cardi

A: Measuring rate and regularity of heartbeat, size, and shape by electrocardiograph, detect tiny…

Q: Blood flow in the heart from right atrium to right ventricle to pulmonary arteries to the lung in…

A: The heart, blood vessels like arteries, veins and capillaries are part of the circulatory system of…

Q: You are testing a compound as cardioactive drug. You know the compound is an agonist of…

A: The sinoatrial (SA) node is known as the natural pacemaker of the heart, responsible for generating…

Q: Discuss why heart rate equals pulse rate at rest and after exercise.

A: Heart rate and pulse rates are functions of the cardiovascular system. It consists of the heart and…

Q: The cardiac cycle includes all the events associated with the flow of blood through the heart during…

A: Human heart is four chambered. The left half of the heart act as the pump for systemic circulation…

Q: This will result in:

A: This will result in an increase in preload.Preload is the amount of force that stretches the…

Q: cardiac output drops, then A and B • A and C Blood flow must decrease Blood flow must increase  The…

A: The objective of the question is to understand the physiological changes that occur when cardiac…

Q: An increase in heart rate leads to a increase in arterial pressure leads to a in end diastolic…

A: The heart is the central organ of the cardiovascular system of the body. It is a myogenic organ that…

Q: Describe the electrical event in the heart that occurs during each of the following: (a) the QRS…

A: Heart is a muscular organ which is responsible for pumping the fluid connective tissue called blood…

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: What does the body do to bring Cardiac Output back up if it drops too low? Give examples of…

A: Cardiac output refers to the volume of blood pumped out per minute from the ventricle. Cardiac…

Q: or ie decregsed (cuch ge in co ntraction

A: A network of blood vessels are involved in circulating blood to all the parts of the body. The heart…

Q: Describe the anatomical abnormalities that would be present in someone living with dilated…

A: anatomical abnormalities that would be present in someone living with dilated cardiomyopathy…

Q: The greater the pulse pressure, the lower the pressure gradient driving blood from the aorta through…

A: Pulse pressure is a measure of the difference between diastolic pressure and systolic pressure. As…

Q: All of the followings are correct about the myogenic pacemaker except, --------------------- They…

A: The cardiovascular system is a principal organ system of the human body concerned with the transport…

Q: Describe the anatomy of movement of the wave of cell depolarization throughout the heart during the…

A: The cardiac cycle:It is comprised of a whole relaxation and contraction of both the atrium and…

Q: During the isovolumetric periods there is no change in volume.

A: Isometric contraction or isovolumetric  period is an event that occurs in the early stages of…

Q: When seated in a normal upright position, what would you expect the systolic blood pressure to be…

A: Option D: Lower than when measured from the arm in its relaxed resting position by your side.

Q: A normal patient has an ECG monitor attached to him/her as he/she Slar S exercises at the gym. The…

A: Blood flow through the heart Blood comes into the right atrium from the body through superior and…

Q: The heart’s pacemaker is called the (complete term)_________. The pacemaker is composed of…

A: The cardiovascular system consists of the heart, the blood vessels, and most importantly, the blood.…

Q: An increase in end-diastolic volume always causes an increase in stroke volume in a normal heart…

A: Stroke volume It is the amount of blood that is forced out from the ventricle per cardiac cycle. It…

Q: Describe the function of the SA and AV nodes as they control contraction of the heart.

A: The heart is a major player of the circulatory system and is a pump made up of muscle tissue. The…

Q: Explain how the pressure differences within the heart chambers are responsible for blood flow during…

A: Introduction: Cardiac valves: (A) ATRIO-VENTRICULAR VALVE (A-V VALVE) A fibrous A-V ring connects…

Q: The cardiac cycle includes all the events associated with the flow of blood through the heart during…

A: An electrocardiogram (ECG) is a recording of the electrical changes that occur in myocardium during…

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.