determinants of blood pressure Flashcards
1
Q
blood volume
A
volume of blood available in the system
2
Q
overall compliance
A
the elastic characteristics of the vessels contribute to the overall pressure
3
Q
sympathetic response on heart
A
noradrenaline is released and B1 receptors activate increasing the permeability of the nodal cell plasma membrane to Na2+ and Ca2+
4
Q
parasympathetic response on heart
A
acetylcholine is released activating M2 receptors increasing the permeability of K+ and decreasing the permeability of Na2+ and Ca2+
5
Q
angiotensin II
A
- causes direct constriction of renal arterioles
- stimulation of aldosterone synthesis, sodium absorption and increase in intravascular blood volume
