unit 4 Flashcards
The CNS refers to
the brain and
spinal cord; Master control of the
body
The peripheral nervous system
links
the body to the outside world.
The somatic nervous system
carries
sensory info to the brain and relays
motor signals to muscles
Cholinergic agonist
sludge” or liquid type action
Anticholinergic
Think “dry” (less saliva and digestive juices)
Adrenergic agonist
adrenergic agonist kicks in for “fight or flight
Adrenergic antagonis
the adrenergic antagonist or blocker
stops the “fight or flight” reaction
Nerve impulse
Axon
◦ Synaptic cleft
◦ Dendrite
Neurotransmitter
Neurotransmitter
Receptors
Muscarinic
Nicotinic
Receptors
Alpha (α) adrenergic receptors
◦ Beta (β) adrenergic receptors
Cholinergic Agonist
Drugs act like acetylcholine
Cholinergic Antagonist
Drugs block acetylcholine
Anticholinesterase
Block the enzyme that breaks
down acetylcholin
Mechanism of Action
binds predominantly to muscarinic receptors
Cholinergic Agonist
Contracts the ciliary muscle
MIOTICS Green
Anticholinergic
blocks muscarinic receptors and
inhibits binding of acetylcholine.
Mydriasis Cycloplegia
(pupil becomes larger, dilates)
(accommodation is paralyzeze) red
Cholinesterase inhibitors
inhibiting the activity of
an enzyme known as acetylcholinesterase. Dark Green (Miotics)
Alpha Agonist
Beta Agonist
Agonists bind to the alpha or beta receptor to mimic
epinephrine or norepinephrine.
Alpha Blocker
Beta Blocker
Antagonists bind to the alpha or beta receptors to
block
Mydfrin (Phenylephrine)
red
Alphagan
Reduces aqueous production * Increases aqueous outflow purple
Beta Agonist
binds to beta receptors (result is
like epinephrine binding to the receptor); causes mydriasis Purple
Alpha Blocker
Blocks the alpha receptors on the
dilator muscle of the iris
Beta Blocker
Binds to the beta receptors
Beta Blocker
Yellow : Light Blue
