ch 20 pt 8 Flashcards
What is proper range?
60
Pressure depends on
Cardiac output, resistance, blood volume
Cardiac center influences blood pressure by
Influencing cardiac output
Vasomotor center influences blood pressure by
Influencing vessel diameter
A1 receptors cause
Vessel constriction
B2 receptors cause
Vasodilation
What is baroreceptors?
Increase stretch of vessel wall and fire rate changes pressure
Vessel with the most pressure
Aortic arch
If radius decreases
Resistance and pressure increase
Baroreceptor reflex’s do what?
Initiated by decrease or increase in blood pressure
If blood pressure decreases what is activated?
Cardioacceleratory center, increase CO and vasodilation
If blood pressure increases what is activated?
Cardioinhibitory center, vasomotor center
What increases chemoreceptors and vasomotor?
High carbon dioxide, low pH, low oxygen
Hypothalamus (ANS) can increase
CO and resistance
Limbic system can alter
Blood pressure in response to emotions or memories