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What will happen if the post - synaptic...

What will happen if the post - synaptic receptors in a chemical synapse are removed ?
(a) Synaptic transmission will be faster
(b) Synaptic transmission will become slower
(c ) Synaptic transmission will be not occur
(d) Synaptic transmission will be unaffected

Text Solution

Verified by Experts

Chemical synaptic transmission will not occur. This is because if receptors on the post - synaptic membrane will be removed, the neurotransmitters released from the pre - synaptic neuron will not be able to bind anywhere on the post - synaptic membrane. The action potential will not develop in the post - synaptic neuron. Hence, synaptic transmission will not occur across a chemical synapse.
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Knowledge Check

  • 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 ?

    A
    `(v)to(iv)to(iii)to(ii)to(i)`
    B
    `(i)to(ii)to(iii)to(iv)to(v)`
    C
    `(i)to(ii)to(iv)to(iii)to(v)`
    D
    `(v)to(iv)to(iii)to(i)to(ii)`

  • Assertion:Electrical synapses are rare in our system. Reason:Impulse transmission across an electrical synapse is slower than that across a chemical synapse.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Which of the following statements is/are incorrect about the electrical synapse ? (i)At electrical synapses, the membranes of pre and post synaptic neurons are in very close proximity. (ii)Electricity current can flow directly from one neuron into the other across the synapses. (iii)Transmission of an inpulse across electrical synapses is very similar to impulse conduction along single axon. (iv)Electrical synapses pass electrical signal between cells with the use of Ach. (v)Electrical synapses are fast. (vi)Electrical synapses are rare in our system.

    A
    (ii),(iv) and (v)
    B
    (i) and (iii)
    C
    (iv) only
    D
    (i),(v) and (vi)

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