Autonomic Nervous System Drugs Flashcards
(55 cards)
What are parts of the central NS?
Brain and Spinal cord
What are parts of the peripheral NS?
Autonomic and somatic NS
What are parts of the autonomic NS?
Sympathetic and Parasympathetic NS
What system requires only one neuron to influence the target organ?
Somatic NS
What is the role of the autonomic NS?
To maintain homeostasis
What two neurons are needed to reach a target organ is most instances?
Preganglionic and postganglionic neurons
What does catabolic mean?
Burning energy
Which system is catabolic?
Sympathetic NS
What system is fight or flight?
sympathetic NS
What system is anabolic?
Parasympathetic NS
What does anabolic mean?
Conserving energy
What does the adrenal medulla release?
80% epinephrine (adrenaline) and 20% norepinephrine (noradrenaline)
What neurons MOSTLY release norepinephrine?
sympathetic postganglionic fibers
All parasympathetic postganglionic fibers release what?
Acetylcholine
What is the role of acetylcholinesterase?
Breaks down acetylcholine
What are the catecholamines?
dopamine, epinephrine, and norepinephrine
What is COMT
The enzyme that metabolizes endogenous and exogenous norepinephrine and epinephrine
What is MAOI?
enzyme that degrades epinephrine and NE
What is the monamine synthesis?
Tyrosine – dopa – dopamine – norepinephrine – epinephrine
What are the receptors for acetylcholine?
Muscarinic and nicotinic receptors
Where are muscarinic receptors?
GI tract, myocardium, blood vessels, exocrine glands, cerebral vasculature
Where are nicotinic receptors?
Skeletal muscle and adrenal medulla
What are the receptors for norepinephrine
alpha and beta receptors
Where are the alpha 1 receptors?
smooth muscle