Cardiovascularity Flashcards
1
Q
- Why does acetylcholine decrease blood pressure?
A
(Sets free Nitric Acid and inhibits cardiac activity)
2
Q
- What is the effect of compressing both left and right vagus nerve?
A
(respiration stops, then deeper and less frequent, heart rate increase)
3
Q
- Which vasomotor centre shows spontaneous activity?
A
(Pressor area)
4
Q
- What is the role of apneustic center?
A
(Inspiration)
5
Q
- Where can you find the respiratory center/neorons?
A
(Brain stem, pons close to vasomotor center in reticular formation)
6
Q
- Which part do you have to stimulate of depressor
A
nerve to cause vasoconstriction?
craniolateral pressor area
7
Q
- Which part do you have to stimulate of depressor nerve to cause vasodilatation?
A
(caudomedial depressor area)
8
Q
- What nerve has the afferent fibers from baroreceptor in the carotid sinus?
A
(Hering’s nerve)
9
Q
- Where are chemoreceptors located in the CNS?
A
(bottom of 4th chamber)
10
Q
- Which nerve is efferent for the heart?
A
(n. vagus)
11
Q
- Where are volume receptors found?
A
(in the lungs and in the capacitance system of circulation eg. Right atrial wall)
12
Q
- What effect does Acetylcholine have on blood pressure?
A
(decrease blood pressure, because it sets free Nitric Acid and inhibits cardiac activity)
13
Q
- Which nerve transmits signals from depressor area to heart?
A
(vagus nerve)
14
Q
- Where are baroreceptors found?
A
(aortic arch and carotic sinus)
15
Q
- Afferent nerve of Hering-Breuer reflex?
A
(vagus nerve)