Which is more?- The sum of excitatory post synaptic potentials or the sum of inhibitory post synaptic potentials?

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Solution

sum of excitatory post synaptic potentials is more

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Q. Do you know how the pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to the post-synaptic neuron?

Q. A list of events occurring in the transmission of nerve impulse across the synapse is given below in a random order.
(i) Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron.
(ii) Neurotransmitter binds to the receptor on post synaptic membrane.
(iii) Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter release into synaptic cleft.
(iv) Depolarisation of pre-synaptic membrane.
(v) Arrival of action potential at axon terminal.
Which of the following options represents these events in a correct order?

Q. ln electrical synapse, impulse from pre-synaptic membrane reaches post-synaptic membrane through:

Complete the statement by chossing appropriate match among the following.

$\begin{matrix} C o l u m n I & C o l u m n I I A . R e s t i n g p o t e n t i a l & 1. C h e m i c a l s i n v o l v e d i n t h e t r a n s m i s s i o n o f i m p u l s e s a t s y n a p s e s . B . S y n a p t i c c l e f t & 2. G a p b e t w e e n t h e p r e s y n a p t i c a n d p o s t s y n a p t i c n e u r o n s . C . S y n a p t i c c l e f t & 3. E l e c t r i c a l p o t e n t i a l d i f f e r e n c e a c r o s s t h e r e s t i n g n e u r a l m e m b r a n e . D . N e u r o t r a n s m i t t e r s & 4. A n e l e c t r i c a l w a v e l i k e r e s p o n s e o f a n e u r o n t o a s t i m u l a t i o n . \end{matrix}$

Q. Which of these is wrong statement/s ?
(i) Neurotransmitter jumps from one junction to another.
(ii) After signal transmittance post-synaptic membrane is destroyed.
(iii) Neurotransmitter is permanently destroyed after the transmission of nerve impulse has taken place.

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