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What are the compensatory mechanisms that are acting to maintain blood pressure in the face of blood loss?
Wiki User
∙ 15y ago
An increase in cardiac output (heart rate x stroke volume) is the main acute compensatory mechanism. There is also constriction of blood vessels to increase total peripheral resistance and maintain central bp. In the more long term, activation of the renin-angiotensin system helps to maintain fluids by reabsorbing sodium and water, releasing aldosterone and promoting thirst. Organs like the liver and the spleen, which act as blood stores, contract to put more blood into circulation. Blood is also diverted away from all systems not considered vital.
Wiki User
∙ 15y ago
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What is the meaning of pressure in drama?
acting
How can the pressure acting on the surface be increased by the force acting on the surface?
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What is the force per unit area acting on a solid?
pressure
What strain or pressure in a material due to forces acting on it?
Stress
The temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid is a?
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2.5 kpa equals how many kgs force?
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How do you maintain net positive suction head of a pump?
first of all the term NPSH should be clear.It is pressure which should be available at the eye of the pump impeller,so as to avoid vaporisation of liquid. Second which arises ,how this liquid will vaporise?Ans-if a vapour pressure of a liquid falls at constt temperature or temperature of liquid is raised at constt pressure it vaporises.In case of pump it's mostly the first case. Now,how to manitain NPSH. NPSHa> NPSHr (always) where NPSHa= available NPSH NPSHr = Required NPSH NPSH = Hps+Hsl-Hvp-Hfl Hps= pressure acting on the eye due to pressure in the suction drum. Hsl = pressure acting due to height of liquid in the suction line. Hvp= vapour pressure of the liquid Hfl= head loss due to friction losses Thus, to maintain the NPSH, variables in hand are,Hps and Hsl.increase the height of the suction line or increase the pressure of the suction drum.
