Control Of BP&BV Part 1 Flashcards
Neural-hormonal mechanisms are also called _________ control mechanisms because they act on organs from outside
Extrinsic
Neural-hormonal mechanism predominate over control of blood flow to ___-critical organs like kidneys, splanchnic organs, resting skeletal muscles
Non
What mechanism controls the HR and cardiac contractility?
Neural-hormonal
Cardiac muscle is under neural-hormonal control, whereas ________ blood vessels are under local control
Coronary
How does neural-hormonal control affect cardiac metabolic rate?
Increases
The increased metabolic rate acts via local metabolic control to _____ coronary arterioles, which increases coronary blood flow
Dilate
Neural-hormonal is _________ for local metabolic control to work
Required
What nervous system regulates the cardio system through these 2 mechanisms?
1) Release of NTs: Norepinephrine and ACh
2) Stimulate the release of epinephrine and norepinephrine from the adrenal medullar
Autonomic
What produces ACh?
Parasympathetic neurons
What do sympathetic neurons produce?
Norepinephrine
What are the receptors activated by epinephrine and norepinephrine called?
Adrenergic
What are the receptors for ACh?
Cholinergic receptors
What adrenergic receptors do vasoconstriction?
Alpha
Smooth muscle in arterioles- sympathetic NS can __________ some organs and thereby direct more blood flow to other non organs
Vasoconstrict
Smooth muscle in abdominal veins- venoconstriction causes a small increase in resistance to blood flow through an organ because veins offer ____ resistance to blood flow than arterioles
Less
