Blood Pressure Regulation Flashcards
What are the 4 ways blood pressure is regulated
baroreceptors, RAAS system, ADH, and natriuresis
Do baroreceptors raise or lower bp
raise
What type of regulation are baroreceptors
neural regulation
Where are baroreceptors located
carotid arteries and the aortic arch
What do baroreceptors do
sense changes in BP and correct short term imbalances caused by position changes/exercise
How do baroreceptors work
stimulate the SNS to increase heart rate, bp, and contractility
When do baroreceptors lose sensitivity
with age
Does the RAAS system raise or lower bp
raise
When does RAAS raise bp
in response to diminished circulation to the kidneys
Steps of the RAAS system
renin is released by the kidneys –> renin stimulates the liver to release angiotensinogen –> angiotensinogen is converted to angiotensin 1 in the lungs –> ACE converts angiotensin 1 into angiotensin 2 –> angiotensin 2 vasoconstricts and stimulates the adrenal gland to secrete aldosterone –> aldosterone works at the nephron to increase sodium and water reabsorption –> increase blood volume and blood pressure
Does ADH raise or lower bp
raise
What is another name for ADH
vasopressin
How does ADH sense bp changes
the posterior pituitary secretes ADH when it sense a drop in BP or increased blood osmolarity
How does ADH work
acts at the nephron to increase water reabsorption, raising blood volume and pressure
Does natriuresis raise or lower bp
lower
