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89 Cards in this Set

  • Front
  • Back
SYM neurons have a ___ postganglionic neuron, whereas PARA neurons have a ___ one.
long NEergic (except sweat)
short cholinergic
Sweat glands are exceptional in that they are innervated by ___, but have ___ic synapse.
SYM
muscarinic
ANS effect on SA node
SYM: tachycardia
PARA: bradycardia
ANS effect on atria
SYM: + inotropic
PARA: - inotropic
ANS effect on AV node
SYM: increased conduction
PARA: decreased conduction
ANS effect on ventricles
SYM: + inotropy
PARA: none
ANS effect on arterioles
SYM: vasoconstriction
PARA: none, but muscarinic AChR present
ANS effect on venules
SYM: venoconstriction
PARA: none
ANS effect on bronchiolar smooth muscle
SYM: bronchodilation
PARA: bronchoconstriction
ANS effect on bronchiolar secretion
SYM: inhibited
PARA: stimulated
ANS effect on intestinal muscle
SYM: relaxation
PARA: contraction
ANS effect on GIT sphincters
SYM: contraction
PARA: relaxation
ANS effect on GIT glands
SYM: none
PARA: secretion
ANS effect on detrusor
SYM: relaxation
PARA: contraction
ANS effect on bladder sphincter
SYM: contraction
PARA: relaxation
ANS effect on vas deferens
SYM: contraction, ejaculation
PARA: none
ANS effect on penis
SYM: flaccidity
PARA: erection
ANS effect on pupillary sphincter
SYM: mydriasis
PARA: miosis
ANS effect on ciliary muscle
SYM: relaxation
PARA: contraction->accomodation
ANS effect on skin
SYM: vasoconstriction, sweating
PARA: none
Skeletal nicotinic receptors are agonized by ___ and antagonized by ___.
nicotine
curare
GIT smooth muscle has ___ic, ___ic, and ___ic synapses.
muscarinic
adrenergic (NE)
serotonergic
GIT mucosa has __ic and __ic synapses
muscarinic
adrenergic (NE)
Parasympathetic nicotinic receptors are agonized by ___ and antagonized by ___.
nicotine
hexamethonium
Parasympathetic muscarinic receptors are agonized by ___ and antagonized by ___.
muscarine
atropine
Sympathetic nicotinic receptors are agonized by ___ and antagonized by ___.
nicotine
hexamethonium
T/F: Hexamethonium is not a good antihypertensive.
True (acts on both SYM & PARA)
neuropeptide Y action
vasoconstriction
vasoactive intestinal peptide (VIP) action
vasodilation
P1 receptor action
vasodilation
P1R is agonized by ___ and antagonized by ___
adenosine
methylxanthines (caffeine)
P2R is agonized by ___
ATP, ADP
Y is converted to ___ by ___.
DOPA
Y hydroxylase
DOPA is converted to ___ by ___.
DA
DOPA decarboxylase (AAADC)
DA is imported to vesicles by ___.
VMAT (vesicular monoamine transporter)
DA is converted to ___ by ___.
NE
DBH (DA beta hydroxylase)
In ___, NE is converted to ___ by ___, in the ___.
adrenal medulla
E
PNMT (phenylethanolamine N-methyl transferase)
cytoplasm
VMAT is blocked by ___.
reserpine
MAO action
replaes alpha amino group with hydroxy or carboxy
COMT action
replaces 3-hydroxy with methoxy
After MAO-COMT in either order, DA becomes ___
HVA (homovanillic acid)
After MAO-COMT in either order, E becomes ___ and NE becomes ___
both become MHPG
After COMT, E becomes ___ and NE becomes ___.
metanephrine
normetanephrine
adrenal pheochromocytomas make more ___ than ___, but other ones do the opposite
E
NE
markers for pheochromocytoma
urinary free catecholamines
VMA
metanephrines
MAO-A is inhibited by ___
clorgyline
phenelzine
tranylcypromine
MAO-B is inhibited by ___
deprenyl
rasagiline
phenelzine
tranylcypromine
MAO-A substrates are (4)
NE
serotonin
DA
tyramine
MAO-B substrates are
phenylethylamine
benzylamine
___ has mostly alpha effects at therapeutic doses, but ___ has ___ effects at low doses and ___ effects at high doses.
NE
E
beta
alpha
Isoproteronol has much greater affinity for ___ than ___. Therefore it causes ___.
beta
alpha
+ inotropism, + chronotropism, vasodilation
isoproteronol action
beta1, 2 agonist
prazosin action
alpha 1 antagonist
phentolamine action
alpha 1, 2 antagonist
E after phentolamine demonstrates ___
E reversal: only beta effect
beta receptor is agonized nonselectively by ___ and antagonized nonselectively by ___
isoproteronol
propranolol
phenylephrine action
selective alpha 1 agonist
clonidine action
selective alpha 2 agonist
beta 1 has greater affinity for ___, whereas beta 2 has greater affinity for ___. ___ agonizes both equally
NE
albuterol
E
in addition to cardiac effects, beta 1 agonists cause release of ___
renin
yohimbine action
alpha 2 antagonist
alpha 1 acts via
Gq -> PLC, PLA, Ca channels
alpha 2 acts via
Gi -> adenylate cyclase
Go -> calcium channels
beta acts via
Gs -> adenylate cyclase
E is used for
cardiac arrest
anaphylaxis
hemostasis
NE is used for
little (some patients with shock + vasodilation)
dobutamine action
selective beta 1 agonist
dobutamine is used for
heart failure
DA is used for
shock
albuterol action
selective beta 2 agonist
albuterol is used for (2)
bronchodilation for asthma
delaying premature delivery
clonidine is used for
antihypertension
naphthazoline, oxymetazoline action
alpha 1, 2 agonists
naphthazoline, oxymetazoline used for
nasal decongestion
nonselective beta agonists (2)
E
isoproteronol
nonselective beta antagonist
propranolol
beta1 agonists (2)
dobutamine
NE
beta1 antagonist
atenolol
beta2 agonist
albuterol
beta3 agonists (2)
BRL-37344
NE
nonselective alpha agonists (2)
E
NE
nonselective alpha antagonists (3)
phentolamine
phenoxybenzamine
ergot alkaloids
alpha1 agonist
phenylephrine
alpha1 antagonist
prazosin
alpha2 agonist
clonidine
alpha2 antagonist
yohimbine
use E for (3)
anaphylactic shock
cardiac arrest
hemostasis
use DA for
cardiovascular shock
use dobutamine for
acute HF