Circulation Ch 21 Flashcards
(23 cards)
How do changes in radius affect bloodflow?
smaller radius means higher surface area
F=deltaP/R
Ischemic Heart Disease
A restriction of blood flow to tissues resulting in a shortage of oxygen and glucose to keep cells alive
how to help someone with this disease
vasodilators, blood thinners
Vasodilators
Nitroglycerine
Bloodthinners
Aspirin, Elloquis, Coumadin(warfarin)
danger of bloodthinners
danger of vasodilators
stops pressure, your flow goes slower long term
arterial blood pressure
MAP
Systolic pressure subtracted by Diastolic pressure
Capillaries are small fast blood vessels while arteries and veins are slow larger vessels
False. Capillaries exchange nutrients, etc and are so so slow and vise versa
Aorta
takes the brunt of blood flow from heart, very low resistance
over 4000/5000 beats an hour
low constant pressure
Vena Cava/veins has little to no pressure
Elastin
a protein that stretches
high blood pressure is a killer
TPR
Capillary hydrostatic pressure (PCAP): Fluid pressure inside vessel
hydrostatic pressure (PIF): Fluid pressure outside vessel
Capillary osmotic pressure (πCAP): a result of non-permeable solutes (proteins) inside the capillary
Interstitial osmotic fluid pressure (πIF): result of non-permeable solutes outside the capillary
why is pressure higher in the arteriole than the venule
blood has to flow in one direction
The arteriole end of the capillary loses more than it receives
net filtration pressure
Filtration pressure - absorption
Positive = fluids leaving
negative = fluids coming in
compression socks
increase the interstitial osmotic fluid pressure
your muscles push blood back up toward your heart bc veins innervate muscles
