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प्रश्न
Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?
उत्तर
As the electrical impulse reaches the axon terminal in the region of axon-dendrite synapse, it stimulates the exocytosis of vesicles containing neurotransmitter (e.g. acetylcholine). Neurotransmitter attaches to the chemoreceptor sites of the membrane covering the dendrite end of synapse. It creates a new impulse that travels through cell body and axon of the second neuron. At synapse, the axon end does not contain any chemoreceptor sites so that reverse flow of electrochemical impulses is not possible.
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संबंधित प्रश्न
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Neuron
Receptor, Spinal cord, Effector, Motor neuron, Sensory neuron.
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Mention the exact location of Malleus
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Axon of one neuron communicates with other nerve cell through synapse.
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Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
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As compare to medullated nerves, the conduction of impulse by non-medullated nerve fibres is ______ times faster.
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In a synapse, chemical signal is transmitted from
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Identify the parts of a neuron which help the nerve impulse to travel away from the cell body.
Name the following:
Three types of neurons
Define the following term:
Nerve
