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Neural Control And Coordination

460 Questions Start Allen Test
All Exams Allen Errorless
Q251 Allen NERVE IMPULSE CONDUCTION MCQ
When a nerve fibers is stimulated the inside of the membrane becomes :-
A.
Filled with acetyl choline
B.
Negatively charged
C.
Positively charged
D.
Neutral
Q252 Allen NERVE IMPULSE CONDUCTION MCQ
"Jumping of the action potential" at the nodes of ranvier is known as :-
A.
Saltatory conduction
B.
Neuro transmission
C.
Recovery phase
D.
Active phase
Q253 Allen NERVE IMPULSE CONDUCTION MCQ
Nerve impulses are generated by nerve fibers only when the membrane shall become more permeable to :-
A.
Adrenaline
B.
Phosphorus
C.
Sodium ions
D.
Potassium ions
Q254 Allen NERVE IMPULSE CONDUCTION MCQ
Speed of impulse on nerves in mammals is :-
A.
1 meter/sec.
B.
100 meter/sec.
C.
1000 meter/sec.
D.
None of these
Q255 Allen NERVE IMPULSE CONDUCTION MCQ
The functional connection between two neurons is called :-
A.
Synapse
B.
Synapsis
C.
Chiasma
D.
Chiasmata
Q256 Allen NERVE IMPULSE CONDUCTION MCQ
Conduction of nerve impulse is :-
A.
Faster in non-myelinated fibres
B.
Faster in myelinated fibres
C.
No difference in the rate of conduction in myelinated & non-myelinated fibres
D.
None of the above
Q257 Allen NERVE IMPULSE CONDUCTION MCQ
A short period during which a nerve is unable to conduct nerve impulse is called :-
A.
Synaptic delay
B.
Refractory period
C.
Resting potential
D.
Critical period
Q258 Allen NERVE IMPULSE CONDUCTION MCQ
When the axons membrane is positively charged outside and negatively charged inside, then the condition is known as :-
A.
Action potential
B.
Resting potential
C.
Active potential
D.
Differential potential
Q259 Allen NERVE IMPULSE CONDUCTION MCQ
The main function of acetylcholine is to :-
A.
Increase heart beat
B.
Help in synaptic transmission of nerve impulse
C.
Help in conduction of nerve impulse through axon
D.
Control reflex action
Q260 Allen NERVE IMPULSE CONDUCTION MCQ
Depolarization of axolemma during nerve conduction takes place because of-
A.
Equal amount of Na⁺& K⁺ move out across axolemma
B.
Na⁺ move inside
C.
More Na⁺ outside
D.
None
Q261 Allen NERVE IMPULSE CONDUCTION MCQ
In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive :-
A.
K⁺ and Na⁺ out of the cell
B.
Na⁺ into the cell
C.
Na⁺ out of the cell
D.
K⁺ into the cell
Q262 Allen NERVE IMPULSE CONDUCTION MCQ
Unidirectional transmission of a nerve impulse through synapse fibre is due to :–
A.
Nerve fibre is insulated by a medullary sheath.
B.
Sodium pump starts operating only at the cyton and then continues into the nerve fibre.
C.
Neurotransmitters are released by dendrites and not by axon endings.
D.
Neurotransmitters are released by the axon endings and not by dendrites.
Q263 Allen NERVE IMPULSE CONDUCTION MCQ
Repolarisation of Neuron is occured due to:-
A.
Influx of Na⁺
B.
Influx of K⁺
C.
Efflux of Na⁺
D.
Efflux of K⁺
Q264 Allen NERVE IMPULSE CONDUCTION MCQ
If GABA is released at synapse area then what will happens :-
A.
Depolarization of neuron
B.
Repolarization of neuron
C.
Hyperpolarization of neuron
D.
No effect
Q265 Allen NERVE IMPULSE CONDUCTION MCQ
Nerve impulse travel through synapse with the help of
A.
Acetylcholine and sympathetin
B.
Choline and acetylcholine
C.
Adrenaline and noradrenaline
D.
None of the above
Q266 Allen NERVE IMPULSE CONDUCTION MCQ
A typical value of resting membrane potential is:
A.
–40 mv
B.
–60 mv
C.
–70 mv
D.
–80 mv
Q267 Allen NERVE IMPULSE CONDUCTION MCQ
Pre synaptic membrane is part of :
A.
Dendron
B.
Axon hillock
C.
Telodendria
D.
Soma
Q268 Allen NERVE IMPULSE CONDUCTION MCQ
Acetylcholinesterase enzyme splits acetylcholine into :
A.
Acetone and choline
B.
Acetic acid and choline
C.
Amino acid and choline
D.
Aspartic acid and acetylcholine
Q269 Allen NERVE IMPULSE CONDUCTION MCQ
During nerve impulse conduction permeability of a membrane is greater for :
A.
Na⁺
B.
K⁺
C.
Equal for both (1) and (2)
D.
Ca⁺²
Q270 Allen NERVE IMPULSE CONDUCTION MCQ
Acetylcholinesterase help in breaking :
A.
Synapse
B.
Acetylcholine
C.
Dendrites
D.
Axon
Q271 Allen NERVE IMPULSE CONDUCTION MCQ
Action potential of a nerve cell is generated by :
A.
Na⁺
B.
K⁺
C.
Ca⁺⁺
D.
Cl⁻
Q272 Allen NERVE IMPULSE CONDUCTION MCQ
Connection between axon and dendrite is :
A.
Synapse
B.
Synapsis
C.
Desmosome
D.
Tight junction
Q273 Allen NERVE IMPULSE CONDUCTION MCQ
During repolarisation of nerve :
A.
K⁺ gates closes and Na⁺ gates opens
B.
Na⁺ channels are closed and K⁺ channels are open
C.
Both gates remain open
D.
Both K⁺ and Na⁺ gates are closed
Q274 Allen NERVE IMPULSE CONDUCTION MCQ
Which of the following diagram illustrates the distribution of Na⁺ and K⁺ ions in a section of non-myelinated axon which is at resting potential?
A.
image.png
B.
image.png
C.
image.png
D.
image.png
Q275 Allen NERVE IMPULSE CONDUCTION MCQ
The one way or unidirectional transmission of nerve cells is due to :
A.
Synapses
B.
Myelin sheath
C.
Membrane polarity
D.
Interneurons