Exam 21: The Cardiovascular System: Blood Vessels and Hemodynamics

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If the roofer overheated,he probably had already lost a significant volume of body fluid through perspiration as his body tried to cool off.That loss would account for the dehydration.Loss of fluid without significant loss of solutes causes the blood colloidal osmotic pressure (BCOP)to increase.The cuts the roofer suffered would cause hemorrhaging and a loss of blood hydrostatic pressure (BHP).If the BHP goes down and the BCOP goes up,the net filtration pressure (NFP)should decrease because NFP = (BHP + IFOP)- BCOP.[IFOP is the interstitial fluid osmotic pressure,which is so much smaller than the BHP or BCOP that it usually doesn't change NFP.]