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Types of Neurons

If synaptic v...

Question

If synaptic vesicles present in axon bulbs are underdeveloped due to genetic mutations, then possible effect would be ___________.

A

Electric impulse transmission will slow down.

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B

Electric impulse transmission will accelerate than normal.

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C

No change in the function of neuron.

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D

Electric impulse will be hampered.

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Solution

The correct option is D
Electric impulse will be hampered.

Synaptic vesicles are tiny sac-like structures containing chemicals called neurotransmitters. These neurotransmitters help in transfer of electric impulses from axon end/axon bulbs to succesive dendrites. Their absense leads to hampering of nerve impulse eventually.

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Similar questions

Q. Question 21
Which of the following statements about transmission of nerve impulse is incorrect?

(a) Nerve impulse travels from dendritic end towards axonal end.
(b) At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
(c) The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
(d) A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.

Q. During synaptic transmission of nerve impulse, a neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q

Q. Synapse is the site for impulse transmission between the of a pre-synaptic neuron and the of the post-synaptic neuron.

Q. 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) Electrical current can flow directly from one neuron into the other across the synapses.
(iii) Transmission of an impulse 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.

Q. Choose the correct pathway for electrical impulse transmission through neurons.

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