CNS MCQs 2
1- Regarding cerebellum which statement is FULSE:
a- it lies within the posterior cranial fossa
b- it is connected to the pons by middle cerebellar peduncles
c- it has outer thick layer of white matter (cerebrallar cortex)
d- it is for control voluntary movement, muscle tone & equilibrium
e- it consists of 2 hemispheres connected by a median portion, the Vermis
2- the brain stem involve:
a- Medulla oblongata, pons & cerebellum
b- Medulla oblongata, pons & midbrain
c- Medulla oblongata, pons & diencephalons
d- Medulla oblongata, pons & cerebrum
e- Forbrain, midbrain & hindbrain
3- regarding Excitatory post synaptic potential (EPSP) all statements are true EXCEPT:
a- it is not action potential
b- it is graded or local response
c- cannot be summated
d- it is due to increase influx of Na+ at postsynaptic membrane
e- if it large enough to reach firing level it can produce AP
4- synaptic delay depend on:
a- number of receptor
b- increase number of receptor
c- less convergence of neurons
d- number of synapses
e- maximum time for transmission across presynaptic neuron
5- regarding DIRECT inhibition:
a- called pre-synaptic inhibition
b- GABA is an example of it
c- glycine is the neurotransmitter
d- the inhibition is produced due to Cl efflux
e- inhibition of antagonist
6- GABA is:
a- the major excitatory neurotransmitter
b- decreased by valium
c- secreted by nerve terminal in retina
d- the neurotransmitter for direct inhibition
e- excitatory in CNS & inhibitory in heart
7- the main function of Dopamine is:
a- increase muscle tone
b- decrease muscle tone
c- control mood, sleep & food
d- control memory & learning
e- cause direct inhibition
8- Alzheimer disease caused by:
a- increase Ach
b- decrease Ach
c- increase norepinephrin
d- decrease dopamine
e- non of above
9- regarding Wirnick's:
a- it play important role in speech & language
b- it is for equilibrium
c- it control respiration & PH
d- control ADH release
e- control muscle tone
10- which one is NOT correctly paired:
a- Glutamate & AMPA receptor
b- Lateral inhibition & discrimination
c- One way conduction & number of vesicles
d- +ve inside cell & inhibition
e- Repetitive impulse & AP
answer
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