20 Questions
What is the primary cause of an abnormal S4 heart sound?
Weak left ventricle
What principle dictates that fluid must move from an area of high pressure to an area of low pressure?
Pascal's Principle
What factor affects Stroke Volume through its inotropic effects?
Epinephrine
Which reflex involves baroreceptors in the carotid arteries and the aorta sensing changes in blood pressure?
Carotid Sinus Reflex
What term refers to the amount of blood flowing from the atria to the ventricles during diastole?
Preload
What does the Medullary Ischemic Reflex control when cerebral blood flow drops?
Blood pressure
Which factor will result in a decrease in Stroke Volume due to an increase in aortic pressure?
Decreased ventricular contractility
What is the term for the rate at which the heart beats per minute?
Chronotropy
Which feature of cardiac function does Starling's Law of the Heart primarily relate to?
Contractile strength
What mechanism stimulates sympathetic impulses to constrict blood vessels when blood distribution or pressure changes?
Vasomotor Pressoreflexes
During which phase of the cardiac cycle do the atria relax and begin refilling?
Passive Ventricular Filling
Which heart sound is caused by the closure of the semilunar valves?
S2
What is the primary function of the purkinje fibers in the heart's conduction system?
To rapidly conduct impulses through the ventricles
Which valve separates the right atrium and right ventricle?
Tricuspid Valve
What happens during Isovolumetric Ventricular Relaxation phase of the cardiac cycle?
AV valves close
Which phase of the cardiac cycle involves both atria contracting to complete emptying?
Atrial Systole
What defines the beginning of Isovolumetric Ventricular Contraction in the cardiac cycle?
Ventricular depolarization
Which heart valve separates the left atrium and left ventricle?
Mitral Valve
What action characterizes Ejection phase in the cardiac cycle?
Rapid increase in aortic blood flow
What is a characteristic of the Purkinje fibers in the heart's conduction system?
To connect the AV node to the ventricles
Explore an overview of the cardiovascular system, including information on the heart, blood vessels, and circulation. Learn about the anatomy and functions of the heart, as well as its location within the human body.
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