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The electrical impulse causes chemicals called neurotransmitters to be released from the axon terminals of the pre-synaptic neuron which diffuseacross the synaptic cleft and fit into receptors on the post-synaptic neuron.

In an excitatory synapse, the presence of the neurotransmitters in the receptors of ligand-gated ion pores cause those pores to open and allow sodium ions into the post-synaptic neuron, which results in an electrotonic signal being conducted down the dendrite and soma to the axon hillock, which may initiate an action potential in the axon if enough signals are summed up at the axon hillock to reach a trigger value.

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12y ago

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

synapse is that junction through which impulse can be transmitted from one neuron to another.


What happens when an impulse reaches the end of an axon?

It reaches the synapse and sends neurotransmitters to start a new impulse to the next neuron


How does the impulse jump the synapse?

Chemical diffusion


A small space across which an impulse travels to move from one neuron to another?

It is most definitely a synapse.


What happens to the body when the receptors that remove catecholamines from a synapse have very low activity?

No impulse is transmitted. Hence the all or nothing principal.


What carries an impulse across a synapse to a muscle?

neurons?


What happens at the synapse between two neuron?

At the synapse, the electrical impulse between the two neutrons at synapse set of chain chemical reactions which create a chemical impulse at the synapse.


Where does an impulse move from on neuron to the other?

The impulse has to cross over a synapse to another neuron or an effector.


What structures cross the synapse to generate the next impulse?

Neurotransmitters.


The junction where one neuron can transfer an impulse to another is called what?

synapse


Is a nerve message also called a synapse?

Nerve messages are called an impulse. Synapses are the space between two axons.


On which direction does an impulse go across a synapse?

An impulse travels in one direction across a synapse, from the presynaptic neuron to the postsynaptic neuron. This ensures that the signal transmission in the nervous system is unidirectional.