how is a nerve impulse ferried across a synapse??

Question

for science final! please help

Answer 1

When the electrical impulse reaches the end of the axon it is transferred to the next nerve cell so the message can continue. At the end of the axon the cell widens out and forms a bulb which comes close to but does not touch the next nerve cell. It is this tiny space between the two cells that is referred to as a synapse. Transmission of the signal across a synapse involves the release of a chemical, called a neurotransmitter, which passes from one cell to the other across the synapse. The neurotransmitter acts on receptor sites on the second cell's membrane, changing its permeability to sodium ions and thus stimulating depolarization. In this manner the nerve impulse is transferred to the second cell.

Answer 2

A synapse is the gap between two neurons. A nerve impulse travels along a nerve through electro-chemical means, but when it comes to the synapse, it transmits chemically. The end of the first neuron releases chemicals called neurotransmitters. The most common one is acetylcholine. The chemical latches on to receptors on the second neuron and activates it, just like a key opens a lock.

Answer 3

Isn't it carried through a special chemical that is in your brain?
I can't recall the name at the moment, but I do know that the nerve and there is a small gap between the two this chemical acts as a conductive substance, and if the there is a chemical imbalance it can cause a serious issue.

Answer 4

Electricity

Answer 5

B. Neurotransmitter as noradrenaline and acetylcholine are responsible for the depolarization of the post synaptic membrane

Answer 6

See this page:

http://faculty.washington.edu/chudler/synapse.html

It is a great site! Don't be put off by its name ("Neuroscience for Kids").

:-)

Answer 7

its an actual electric charge