Include. 1  Supplement. 2  LIFEPAC Science Diagnostic Test, Grades 7-12. In Stock. 3  Lifepac Science Grade 10: Science Experiments on DVD. In Stock. 4  LIFEPAC Science Grade 10 Manipulatives Kit. In Stock. 5  Included in Kit. 6  Lifepac Science, Grade 10 (Biology), Teacher's Guide. In Stock. 7  Lifepac Science, Grade 10 (Biology), Workbook Set. In Stock.
I'm not sure what the mechanism is, but the nurse is only partially right. An increase in pCO2 causes vasoconstriction in the pulmonary vasculature and vasodilation EVERYWHERE else. CO2 causes constriction in the pulmonary vasculature because an increase in pC02 sends the message there is damage/shunting here, sending blood here will not effectively oxygenate it so blood is preferentially sent to a different part of the lung where it will receive better oxygenation.
Generalized vasoconstriction usually results in an increase in systemic blood pressure, but it may also occur in specific tissues, causing a localized reduction in blood flow.The extent of vasoconstriction may be slight or severe depending on the substance or circumstance.or example, vasoconstriction is a hypothermic preventative in which the blood vessels constrict and blood must move at a higher pressure to actively prevent a hypoxic reaction. ATP is used as a form of energy to increase this pressure to heat the body.