Short Term Control of Blood Pressure Flashcards
1
Q
What measures blood pressure in the body?
A
Baroreceptors
2
Q
What are baroreceptors?
A
Stretch receptors
3
Q
What happens when mean arterial pressure is too low?
A
Fainting (syncope)
4
Q
What happens when mean arterial pressure is too high?
A
Hypertension
5
Q
What are the inputs to the medullary cardiovascular centres?
A
Cardiopulmonary baroreceptors Central chemoreceptors Chemoreceptors in muscles Joint receptors Higher centres Carotid sinus baroreceptors Aortic arch baroreceptors
6
Q
What effect does sympathetic innervation of the heart have?
A
Increases heart rate, inotropy and conduction velocity
7
Q
What effect does parasympathetic innervation of the heart have?
A
Decreasing heart rate, isotropy and conduction velocity
8
Q
What is the Valsalva manoeuvre?
A
Forced expiration against a closed glottis
9
Q
How is the Valsalva manoeuvre’s effect and postures effect on blood pressure corrected?
A
By the baroreflex
