12 Questions
What is the main factor that determines cardiac output under normal unstressed conditions?
Peripheral factors that determine venous return
What is the relationship between cardiac output and total peripheral resistance when arterial pressure is unchanged?
Cardiac output decreases as total peripheral resistance increases
What is the primary mechanism that regulates local blood flow in most tissues?
Tissue metabolism
What is the consequence of the returning blood exceeding the heart's pumping ability?
The heart becomes the limiting factor that determines cardiac output
What is the sum of all the local blood flow regulations in the peripheral circulation?
Cardiac output
What is the reflex initiated by the stretched right atrium that increases the heart rate?
The Bainbridge reflex
What is the primary controller of cardiac output in normal conditions?
Peripheral factors affecting venous return
What happens to the cardiac muscle when the heart chambers are stretched due to increased blood flow?
It contracts with increased force
What is the direct effect of stretching the sinus node in the right atrium?
Increased heart rate
What is the result of the Frank-Starling mechanism when increased quantities of blood flow into the heart?
The heart pumps the amount of blood that flows into it
What determines the amount of blood pumped by the heart?
Venous return
What is the name of the mechanism that allows the heart to pump automatically the amount of blood that flows into it?
Frank-Starling law of the heart
Explore the crucial role of peripheral circulation factors in controlling cardiac output, particularly the Frank-Starling mechanism. Learn how venous return affects heart function and overall blood flow. Discover the importance of this mechanism in maintaining cardiovascular health.
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