scoliendo
scoliendo OP t1_ituatr8 wrote
Reply to comment by auraseer in How does vasoconstriction reduce blood pressure in haemostasis? by scoliendo
That's what I thought, but apparently when a blood vessel is injured, the vessel constricts in order to reduce blood pressure, which is the opposite of my understanding. Hence the question.
scoliendo OP t1_itpu5x5 wrote
Reply to comment by penicilling in How does vasoconstriction reduce blood pressure in haemostasis? by scoliendo
So as I theorised, the vasoconstriction is occurring proximal to the injury, rather than at the site of the injury? This makes the most sense to me, which is why I theorised it, I just wish my course materials had explained this!
From what I understand based on this... blood is flowing at standard pressure until it reaches an area of vasoconstriction. Beyond this area is a damaged blood vessel. The constricted vessels allow less blood through per second, thus reducing the blood pressure in areas distal to this vasoconstriction, along the same artery/arteriole network, reducing the pressure on the damaged area. Is this accurate?
scoliendo OP t1_itpgzsr wrote
Reply to comment by CardiOMG in How does vasoconstriction reduce blood pressure in haemostasis? by scoliendo
So are all capillary beds fed by more than one artery/arteriole network? Or are some capillary beds only fed by one? And if the latter is the case, what happens to that capillary bed when the blood flow is reduced?
scoliendo OP t1_ituc714 wrote
Reply to comment by auraseer in How does vasoconstriction reduce blood pressure in haemostasis? by scoliendo
So as I hypothesised, the vasoconstriction is occurring proximally to the injury in order to reduce blood flow and hence blood pressure at the site of the injury. Thank you! I just wish my texts had made this more clear - they all state it as though the vasoconstriction is happening AT THE INJURY SITE.