Lecture 24 : Cardiovascular Integration Flashcards
1
Q
What is the equation for mean arterial blood pressure?
A
MABP = CO x TPR
2
Q
What value is the resting arterial blood pressure?
A
~90 mmHG
3
Q
What is the function of of arterial blood pressure?
A
Provides sufficient pressure to overcome resistance of the vessel while flowing at the desired rate
- Needed to maintain adequate perfusion (fainting)
4
Q
What are 4 reflex mechanisms maintaining normal arterial pressure?
A
- Arterial Baroreceptors
- Carotid and aortic chemoreceptors
- Cardiopulmonary Baroreceptors - “low pressure receptors”
- Central chemoreceptors - in medulla
5
Q
What are the sensors of arterial baroreceptor reflex?
A
Aortic and carotid sinus baroreceptors
6
Q
Where are the afferent fibres of the arterial baroreceptor sensors?
A
Travel in vagus and glossopharyngeal nerves to CVS centres in brainstem - nucleus tractus solitarius in the medulla
7
Q
A
