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Exam II Q's

Blood Hemodynamics & Lymph

QuestionAnswer
define Blood presssure force blood exerts on vessel walls
define blood flow amount of blood flowing thru vessels per unit of time (ml per min.)
define resistance produced as blood encounters friction and turbulence against the vessel and heart walls
how does R affect blood flow? increased R decreased BF
what vessels produce the greatest R to BF? arterioles
what does PR (peripheral resistance) mean? greatest R is in arterioles (P=away ffrom heart)
formula for BP BP= Flow X Resistance
explain BP formula 1.increased F causes increased BP, decreased F causes decreased BP 2.increased R causes increased BP, decreased R causes decreased BP
how does a change in pressure affect flow if R does not change? MABP rises
two main factors in BF CO, BV
define CO amount of blood ejected by left ventricle in one minute
define BV total amount of blood in body
what causes blood to flow? difference in pressure
how do changes in CO affect BF? harder heart working greater flow+ pressure/ arterioles dialate
3 factors in R diameter vessel, viscosity blood, length vessel
define MABP single measure (average) of arteriole BP
formula for PP systolic BP -diastolic BP
formula for MABP DP + PP/3
define PP difference in systolic & diastolic pressures
3 factors in resistance size of lumen, viscosity of blood, total vessel length
how do changes in vessel diameter affect flow smaller diameter increases R
Created by: ShellyA&P
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