Regulation of Arterial Pressure Flashcards
What are the three locations of baroreceptors?
- ) Carotid sinus
- ) Aortic sinus
- ) NTS
What nerves does the carotid sinus associate with?
Glossopharyngeal (CN 9)
Sinus nerve of hering
What nerves does the aortic sinus associate with?
Vagus (CN X)
Aortic nerve
What do baroreceptors respond to?
Changes in arterial pressure on the vessel wall (stretch)
Do baroreceptors increase or decrease firing in response to stretch?
Increase firing rate
Do baroreceptors increase or decrease firing in response to a fall in pressure?
Decrease firing rate
What are baroreceptors most responsive to?
The rate of change, compared to the magnitude of change.
ie.) the quicker the change in pressure
What is the function of Bradykinin?
Vasodilation
What is the formula for MAP?
MAP = 2/3 (DBP) + 1/3 (SBP)
What is MAP also equal to?
= CO x TPR = HR x SV x TPR
Where do the carotid sinus and aortic sinus lead?
To the nucleus tractus solitarius (NTS)
What is the function of the NTS?
To receive and coordinate peripheral signals from the carotid and aortic sinus’.
The dorsal motor nucleus of the vagus and nucleus ambiguus are associated with sympathetic or parasympathetic?
Parasympathetic
The rostral ventrolateral medulla is associated with sympathetic or parasympathetic?
Sympathetic
