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The point at which two neurones meet is called the synapse. At this point there are 2 situations:

1: there is no gap, the neurones are physically connected by gap-junctions. This is a rarer situation but does occur. In this case the nerve impulse continues down the second neurone (known as the post-synaptic nerve)

2: there is a small gap (a few micrometers) between the cells. In this case the first nerve, carrying the impulse, (pre-synaptic) causes a release of a chemical known as a neurotransmitter. There are various types of neurotransmitters and each are involved in different situations. When the neurotransmitter reaches the 2nd nerve it binds to the membrane (in most situations) which either causes the cell to depolarize and continue the impulse, or causes hypo-polarization which prevents any other nerve stimulating it.

Short and Simple Answer:

Nerve impulse is transmitted by:

- nerve impulse triggers transmitter substance

- which diffuses across synapse

- the transmitter substance binds with receptor molecule in membrane of next molecule

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What is the name of the region where two neurons are in done contact is known as?

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Is it correct that synaptic clefts prevents an impulse from being transmitted directly from one neuron to another?

Yes, that is correct. The synaptic cleft is a small gap between neurons, and it prevents direct transmission of impulses. When an impulse reaches the end of a neuron, it triggers the release of chemical messengers called neurotransmitters into the synaptic cleft. These neurotransmitters then bind to receptors on the adjacent neuron, allowing the impulse to be transmitted indirectly.


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