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

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Solution

The axon terminals contain vesicles filled with these neurotransmitters. When an impulse (action potential) arrives at the axon terminal, it stimulates the movement of the synaptic vesicles towards the membrane where they fuse with the plasma membrane and released their neurotransmitters in the synaptic cleft. The released neurotransmitters bind to their specific receptors, present on the post-synaptic membrane. This binding opens ion channels allowing the entry of ions which can generate a new potential in the post-synaptic neuron.

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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?

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

Q. Assertion: Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
Reason: Transmission across a synapse usually requires neurotransmitters because there is small space i.e. synaptic cleft, that separates one neuron from another.

Q. The synaptic vesicles in the neuron contain:

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