short term control of BP Flashcards
1
Q
MAP =
A
CO x TPR
2
Q
arterial baroreflex
A
aortic arch and carotid sinus baroreceptors
stretch chemoreceptors, when stretch fire APs
negative feedback system
3
Q
aortic arch baroreceptors go through which nerve
A
vagus nerve
4
Q
carotid sinus baroreceptors go through which nerve
A
glossopharyngeal
5
Q
what does medullary cardiovascular system use to alter MAP
A
sympathetic and parasympathetic nervous systems
6
Q
other inputs to medullary cardiovascular centres
A
cardiopulmonary baroreceptors central chemoreceptors chemoreceptors in muscle joint receptors higher centres
7
Q
what is valsalva manoeuvre
A
forced expiration against a closed glottis
8
Q
valsalva manouevre - what happens
A
inc thoracic pressure - dec venous return
dec EDV, dec SV, dec CO, dec MAP
low MAP detected by baroreceptors which initiate reflex inc CO and TPR
