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Worksheetsphysiology
Total questions: 15
Worksheet time: 8mins
about Na /K ATPase pump all of the following are correct EXCEPT
Require high energy
Contribute for the creation of resting membrane potential
Keep intracellular sodium low
Is explained by facilitated diffusion
The opening of axon membrane voltage – gated potassium channels is responsible for which part of the action potential ?
Repolarization of the membrane
Contraction of the post synaptic muscle fibers
Exocytosis of the neurotransmitter from nerve terminal
Depolarization of the membrane
During depolarization
Sodium channels are closed
Calcium channels open
Sodium channels open
sodium efflux
which of the following ions needed for release neurotransmitters
sodium
potassium
calcium
all of the above
according to sympathetic which of the following is True ?
preganglionic sympathetic is long
postganglionic sympathetic release mainly acetylcholine
postganglionic sympathetic is short
preganglionic sympathetic release acetylcholine
all of the following sentences are true EXCEPT :
there is no ganglia in somatic nervous system
all preganglionic release acetylcholine
parasympathetic preganglionic neurons are much longer than the postganglionic neurons
Choline is acetylated by acetyl-CoA with the aid of esterase enzyme
according to actions of acetylcholine which of the following is False
Decrease force of contraction by acting on M2 receptors
Increase tone and motility of small and large intestines (M3)
Increase the secretion of all exocrine secretions
stimulate endothelium nitric oxide synthase (ENOS) increase the release of NO which increase cAMP
for treatment Glaucoma we need drugs that act on
M 1
M2
M3
Ni
Nitric oxide cause
decrease in heart properties
increase HCL
vasodilation
vasoconstriction
Dr/Ali Elmeafy 27 years old , from Elmahalla Elkubra , Ali suffers from hyperacidity and peptic ulcer , which of the folllowing drug is needed
drug activate M1
drug block M1
drug activate M2
drug block M2
A patients who suffers from Bronchial asthma need a drug acting on
blocking M1
blocking M2
blocking M3
blocking N1
whic of the following is correct
postgnaglionic sympathetic release NE
postganglionic parasympathetic release A.ch
somatic considered single
all of the above
according to NE synthesis all of the following are correct EXCEPT
Tyrosine is converted by hydroxylation into DOPA
Decarboxylation reaction of DOPA will give dopamine
dopamine is metabolized into nor epinephrine through β-hydroxylation reaction
NE is converted in to E through oxidation reaction
Norepinephrine acting mainly on B receptors
true
false
...
....
1. Resting membrane potential of a nerve fiber :
Is mainly due to sodium influx
Is mainly due to potassium influx
Is mainly due to chloride influx
Is due to the presence of negative charges on the inner surface in relation to its outer surface .
