What best describes the Frank-Starling law?
What best describes the Frank-Starling law? The Frank-Starling law states that the more the ventricular muscle cells are stretched, the more forcefully they contract. Sometimes health care providers will elect not to treat conditions such as atrial fibrillation in which there is no functional atrial contraction.
What does the Frank-Starling mechanism help explain?
Cardiac System The Frank-Starling mechanism defines the normal relationship between the length and tension of the myocardium. The greater the stretch on the myocardium before systole (preload), the stronger the ventricular contraction.
Why is the Frank-Starling curve is important?
The functional importance of the Frank-Starling mechanism lies mainly in adapting left to right ventricular output. During upright physical exercise an increase in end-diastolic volume due to the action of the peripheral muscle pump and increased venous tone can assist in enhancing stroke volume.
Which of the following is the correct definition of Frank-Starling law of the heart?
The Frank-Starling law of the heart (also known as Starling’s law or the Frank-Starling mechanism) states that the more the ventricle is filled with blood during diastole (end-diastolic volume), the greater the volume of ejected blood will be during the resulting systolic contraction (stroke volume).
What is described by the Frank-Starling law of the heart quizlet?
The Frank-Starling law of the heart (also known as Starling’s law or the Frank-Starling mechanism or Maestrini heart’s law) states that the stroke volume of the heart increases in response to an increase in the volume of blood filling the heart (the end diastolic volume) when all other factors remain constant.
What is the meaning of Starling law?
Definition of Starling’s law : a statement in physiology: a muscle that is stretched within normal limits at the time of stimulation contracts more strongly than one that is completely relaxed.
What does Starling’s law state?
The Frank-Starling Law states that the stroke volume of the left ventricle will increase as the left ventricular volume increases due to the myocyte stretch causing a more forceful systolic contraction. This assumes that other factors remain constant.
How the Starling’s law of the heart is involved in the maintenance of the blood pressure?
Starling’s Law states that the heart will eject a greater stroke volume if it is filled to a greater volume at the end of diastole. The volume of the heart at end diastole is related to the filling pressure of the heart (preload) which is determined by the left atrial pressure (LAP).
What variable’s can the cardiovascular system alter to maintain blood pressure?
The variables affecting blood flow and blood pressure in the systemic circulation are cardiac output, compliance, blood volume, blood viscosity, and the length and diameter of the blood vessels.
What is Starling’s Law of the heart What effect does an increase or a decrease in venous return have on cardiac output?
Increased venous return increases the ventricular filling (end-diastolic volume) and therefore preload, which is the initial stretching of the cardiac myocytes prior to contraction.