Chemical synapse
Introduction
Chemicalsynapsesarepreservedandmainlyexistinthehumanbrainasaresultofnaturalselection.
Advantages
Theadvantagesofchemicalsynapsesareasfollows:
First,chemicalsynapsescanensuretheunidirectionalityofnerveconduction.
Ithinkso.Thehumanbrainhastoreceivealotofinformation,andsomeoftheinformationmayevenbecompletelyopposite.Therefore,ifitisanelectricalsynapse,thenitislikelythattherewillbeasituation,thatis:twoneuronstransmitinformationtoeachotheratthesametimeOnthecontrary,therewillbe"fights."
Chemicalsynapsesaredifferent.Duetotheroleofneurotransmitters,theycanensuretheunidirectionaltransmissionofinformationandbetterhelpthebrainwork.
Second,chemicalsynapsescanensurethatthepostsynapticmembraneselectivelyreceivesinformationfromtheanteriormembrane.
Theconductionmechanismofchemicalsynapsesissuchthatneurotransmittersarereleasedfromthepresynapticmembraneintothesynapticcleft,andthetransmittersenterthepostsynapticmembranethroughreceptorsonthepostsynapticmembranetotransmitinformation.Thisensuresthattheinformationenteringthepostsynapticmembraneisfiltered.
Liketheblood-brainbarrierofthebrain,itcanensurethatthesubstancesenteringthebrainarescreened.Thisisaprotectiveeffectonthehumanbody.
Third,chemicalsynapsesaremoreadaptedtotheactivitiesofthehighernervoussystem.
Becauseofthepresenceoftransmitters,chemicalsynapsesarepronetofatigue(becauseofthedepletionoftransmitters),anditisthisfatiguethatcanensurethenormaloperationofthehigh-levelnervecenter.
Iftheadvancedcenterhasbeenworkingallthetime,acceptingalltheinformationthatentersthehumanbody,thenitisalossforthebody!
Therearealsohabituation,sensitization,long-termenhancement,andlong-termweakeningintheplasticityofsynapses,whichareallduetotheroleofchemicalsynapsesandareretainedintheprocessofnaturalselection.的,;Itisofgreatsignificancetotheadvancedfunctionsofthebrainsuchaslearningandmemory.
Thisissomethingthatelectricalsynapsescannotdo.
Fourth,chemicalsynapsescanactlonger.
.
Latest: CCD camera
Next: Delete Files