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Types of Synapse

Neurotransmit...

Question

Neurotransmitters are stored in

A

Synaptic knob

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B

Synaptic vesicles

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C

Post-synaptic neuron

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D

All of the above

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Solution

The correct option is B Synaptic vesicles
A neuron has 3 parts - cell body, axon and dendrites. At a chemical synapse, the membranes of the presynaptic neurons and postsynaptic neurons are separated by a fluid-filled space called synaptic cleft.
The prefixes "pre-" and "post-" reflect the direction of synaptic transmission: presynaptic is the transmitting side (synaptic knob) and postsynaptic is the receiving side (dendrite, soma, or effector). Synaptic knobs contain many membrane-bounded synaptic vesicles.

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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?

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Types of Synapse

Standard XII Biology

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