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    What are the main steps in chemical neurotransmission?

    An action potential travels along an axon until it depolarizes the membrane at an axon terminal. Depolarization of the membrane causes voltage-gated Ca 2+ channels to open and Ca 2+ to enter the cell. The intracellular calcium influx causes synaptic vesicles containing neurotransmitter to fuse with the presynaptic membrane. The neurotransmitter diffuses across the synaptic cleft and binds to receptors on the postsynaptic membrane. Depending on the specific neurotransmitter and postsynaptic receptor, this action can cause positive (excitatory postsynaptic potential) or negative (inhibitory postsynaptic potential) ions to enter the cell.

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Questions & Answers

what are products of the light reactions of photosynthesis that are utilised in the Calvin cycle?
Nellie Reply
light stage reaction of photosynthesis is represented in the chemical equation ; 4H+ >>>>>> ²H20 + O2 (Hydroxyl). (water) (oxygen)
Emmanuel
a man with blood group A married a woman with blood group B,their child has blood group O,what are the genotype of the parents
Adesewa Reply
your question is not clear
Emmanuel
Ai woman Bi man
INGIPHILE
Is this a science student asking question
Sando
how are living organisms grouped?
Jimmy Reply
what are the basic concepts of biology
Dolapo Reply
what features differentiate metaphase and anaphase stage
Paul Reply
please I need full biology textbook
Ugwuanyi Reply
what are the vital component of biochemistry
Isaiah Reply
what are the vital components of biochemistry
Isaiah
what is the importance of cells
Samuel Reply
epiphytes grow on branches of large trees and competing for light in the canopy by climbing up those large trees while using them for support at same time. what type of ecological interaction is seen here?
Kenneth Reply
how can we practically eliminate or reduce climate change?
Thomas Reply
Fine question
Sando
According to science hepatitis is a disease cause by hepatitis virus which I know, and also do not have a fixed definition or treatment, can the discover better explain
Sando
hello
eunice
Welcome
Sando
by modernizing man's activity
Jimmy
what will the under secretion of somatotropin result
Jovita Reply
The under secretion of Somatotropin growth hormone results in DWARFISM, a condition of retarded growth....
Emmanuel
what are nutrients needed by plants
Mabeni Reply
calcium, phosphorus, potassium, nitrogen ,magnesium
Shukurat
why is the cell made up of celullose wall
Mungudit Reply
what are prokaryotic and eukàryotic
Desire Reply
what is ribose
Quadri Reply

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Source:  OpenStax, Biology. OpenStax CNX. Feb 29, 2016 Download for free at http://cnx.org/content/col11448/1.10
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