L17- central control of BaroR Flashcards
inputs from what types of receptors into the medulla for ANS control of CVS
aortic and cartoid BRs
cardipulm Rs
chemoRs
outputs for ANS control of CVS
PNS - vagal nerve
SNS- post gang from spinal cord to the heart
adrenal gland
how toc alculate ABP
COXTPR
eqn for CO
SV X HR
2 types of arterial BRs
carotid sinus and aortic arch
BR s are stimulated by whar
increases in stretching of the vessel wall
- due to increase in BP
what happends to the AP from the BRs as BP icnrease
increases
what happends to the AP from the BRs as BP decrease
decrease
-called receptor unloading
what affects BR sensitivity
aging becuase the arteries can get stiffer
where is the sensort info from the BRs sent to
NTS in the medulla
outputs from the medulla to decrease BP
decrease SNSN so decreasing contractiltiy, veous return and tpr
increasing PNS
what happens to the blood when lying
blood distrubuted evenly
what happens when standing upright
gravity increases so
decreasing VR, CO and ABP
resposne to standing upright
BR reflex (BRR) as the bp drops
ANS effects due to BRR
increases SNS so HR and contractilty increase > Co increase
increase contriction so tpr increase
so BP increase
endocrine ffects of BRR
SNS so ADR releases and acting on B1 receptors
ABP increase
renal effects of BRR
renin release so contriction happen
-TPR increase and water reabsorption with sodium
what will happen to the BRR when the BP is maintained for few mins
reset and change its set point to a higher pressure to retain resposeiveness of BRR
what are cardiopulm R
stretch receptors in the blood vessels
response of cardopulm R a
detects low vol in the vessels
- contriction and water reabsorption
- icnrease TPR and blood vol
