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Value of the Sympathetic Nervous Reflexes ... help

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Value of the Sympathetic Nervous Reflexes. In the
absence of the sympathetic reflexes, only 15 to 20 percent
of the blood volume can be removed over a period of 30
minutes before a person dies; in contrast, a person can
sustain a 30 to 40 percent loss of blood volume when the
reflexes are intact. Therefore, the reflexes extend the
amount of blood loss that can occur without causing
death to about twice that which is possible in their


This is what Guyton says about it ... but i have difficulty understanding it ... Does it mean that with the nervous reflexes body can decrease the loss of blood in hemorrhage to 40 % and without it we possibly loss 20% ?

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