How Is Blood Pressure Controlled Flashcards
Body has three ways of regulating _
Blood pressure
Can alter cardiac output by changing _ of heart contraction (2)
Force
Rate
It can alter _ of blood vessels (2)
Diameter
Elasticity
It can change _ of blood
Circulating volume
Two mechanisms that control blood pressure in short-term (2)
Nervous control
Chemical control
Blood pressure sensors in arteries send info to _
Medulla
Medulla calculates whether _
Blood pressure needs to be corrected
If blood pressure needs to be corrected, medulla sends signals to heart to modify (2)
Rate
Beat strength
Medulla sends info to blood vessels to _
Modify their diameter
Large number of _ can either constrict or dilate blood vessels
Blood-borne chemicals
(Chemically)
Long-term, blood volume controlled by chemicals that act in _
Kidneys
If blood pressure falls, kidneys conserve water by producing _
More concentrated forms of urine
Kidneys conserving water increases _
Blood volume
Excess stress can cause high blood pressure by causing _ to malfunction
Medulla
Pressure sensors are in _
Aortic arch
Pressure sensors also in _
Carotid sinus
_ control secretion of hormones involved in blood pressure regulation (2)
Hypothalamus
Pituitary gland
