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The second heart sound results from vibrations generated by the .?
Wiki User
∙ 15y ago
closing of the semilunar valves at the start of diastole
Wiki User
∙ 15y ago
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What is it called when there are no QRS waves following p waves?
The QRS complex and the P wave are features of the electrocardiogram, which graphically displays the electrical activity of the heart. The P wave is generated when the atria, or upper chambers of the heart contract. The QRS complex is generated when the ventricles or lower chambers of the heart contract. If there is a P wave but no QRS, the the heart's main pump is not functioning. This would cause death quickly.
What is the upper flat portion of the heart that is located at the level of the second rib?
the upper flat portion of the heart is called the base
Failure of homeostatic regulation in the body results in?
Failure to maintain homeostasis leads to, diabetes, & heart failure.
What part does the brainstem control?
The heart is a muscle with it's own ability to create electrical impulse via the sinoatrial node (SA node) that lies in the right atrium. The impulses generated by the SA node are very regular and constant. However, the SA node can be sped up or slowed down by autonomic nerve impulses that come from the brainstem. The brainstem is told how to change the heart rate by information from the hypothalamus. Thus, although the heart controls its own heartbeat, it can be modified as necessary under the control of the brainstem and hypothalamus.
How should policymakers determine the amount of money that should be allocated for research curing heart disease?
Whether the last dollar devoted to research on heart disease results in more benefit than the last dollar spend on research for curing other diseases.
What is blood flow generated by?
The flow of blood times the resistance of the blood vessels.
What valve causes the second heart sound?
The closing of the mitral and tricuspid valves results in the first heart sound. The closing of the aortic and pulmonic valves results in the second heart sound.AV valve
Which heart sound results from the AV valves closing?
S2, also called the second heart sound, or "dub" when characterized by the sound lub-dub.
What is the sound of second heart sound?
The second heart sound (S2) is a short burst of auditory vibrations of varying intensity, frequency, quality, and duration. It has two audible components, the aortic closure sound (A2) and the pulmonic closure sound (P2), which are normally split on inspiration and virtually single on expiration. S2 is produced in part by hemodynamic events immediately following closure of the aortic and pulmonic valves. The vibrations of the second heart sound occur at the end of ventricular contraction and identify the onset of ventricular diastole and the end of mechanical systole.
How hydrostatic pressure is generated in the heart?
Hydrostatic pressure is generated by the systole (contraction of the ventricles).
What is a heart beat?
A heart beat is the shockwave generated from your heart rapidly contracting to force blood out, and expanding to draw more in.
What organ in the fish is closely related in the function of a human ear?
lateral lines, they pike up vibrations
How is blood pressure generated that forces blood to circulate throughout the body?
Blood pressure is generated by the heart. When the heart muscles contract, they create pressure to push blood around the circulatory system.
What happens to the heart when an action potential is generated in the SA node?
it contracts
A graphic tracing of the electric current generated by the heart is called?
electrocardiogram
How is a heartbeat generated?
it is valves in the heart opening and closing.
The most important force in venous flow is?
pressure generated by the heart
