New answers tagged cardiology
Ions are not hormones. Ions are not metabolites either. Technically, anything that is not directly absorbed from environment but is synthesized/modified in the body is a metabolite. Even if you don't consider polypeptides as metabolites (which for some reason are not classified as metabolites in scientific parlance), all the molecules that you mention are ...
Rate is controlled outside the heart by the Vagus Nerve having parasympathetic activity on the sinoatrial nerve. Stroke volume (taking contractility and Starling's law as one) are factors from the cardiac tissue itself - "intracardiac".
The vessel diameter is the most principal determinant to control resistance. Compared to other smaller vessels in the body, the artery has a much bigger diameter (4 mm), therefore the resistance is low. In addition, flow rate (Q) is also the product of the cross-sectional area of the vessel and the average velocity (Q=AV). Flow rate is directly proportional ...
Capillary fluid shift mechanisms If the pressure of the blood is high, there is high hydrostatic pressure. Simply put, this means fluid exits the capillaries at the arterial side due to this pressure, and less fluid returns at the venous side. With less fluid in the circulation, blood pressure falls. Stress-relaxation of the vasculature Imagine the ...
The ESV is the residual volume of blood remaining in the ventricle after ejection. It is the minimum volume of blood in the ventricles (residual volume). Note that you can also have residual volume of air in the lungs after exhalation.
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