Ngā Tauira Pātai e Matapaki ana i te Hanganga me te Mahi a te Pūnaha Io
Ko te pūnaha io tētahi o ngā pūnaha tinana tino uaua, tino nui hoki, e whakahaere ana i ngā mahi nui pēnei i te nekehanga, te kare ā-roto, me te whakaaro. Hei mārama ake ki te hanganga me te mahi a te pūnaha io, me matapaki tātou i ngā tauira e whai ake nei.
Pendahuluan
E rua ngā wāhanga matua o te pūnaha io o te tangata: te pūnaha io matua (CNS), kei roto ko te roro me te taurakira, me te pūnaha io taha, kei roto ko ngā io e hono ana i te CNS ki te toenga o te tinana. Ko te mahi matua o te pūnaha io ko te whiwhi i ngā whakaohooho, te tukatuka i ngā mōhiohio, me te tuku urupare tika ki ētahi atu wāhanga o te tinana.
Pātai 1: Hanganga Taketake o ngā Neuron
Pātai: Whakamāramahia te hanganga o te neuron me āna mahi!
Kōrero:
Ko ngā neuron ngā waeine taketake o te pūnaha io. He maha ngā wāhanga nui o ia neuron:
1. Tinana Pūtau (Soma): Koinei te pokapū whakahaere o te neuron, kei roto ko te karihi pūtau me ētahi atu whekau. Ko tana mahi he tukatuka i ngā mōhiohio e whiwhihia ana mai i ngā dendrite me te whakahaere i ngā mahi pākia o te neuron.
2. Ngā Dendrite: Ngā hanganga peka e toro atu ana i te tinana pūtau. Ko tā rātou mahi he whiwhi tohu mai i ētahi atu neuron me te tuku atu ki te tinana pūtau.
3. Ākona: He hanganga roa e tuku ana i ngā karere mai i te tinana pūtau ki ētahi atu io, ki ngā kaiwhakawhiwhi rānei pērā i ngā uaua, i ngā repe rānei.
4. Te Pūtake o te Ākona (Axon End): Ko te wāhi e hurihia ai ngā nekehanga hiko hei tohu matū hei tuku ki ētahi atu neuron mā roto i ngā synapses.
5. Synapse: He āputa iti i waenganui i te pito o te axon me te dendrite o te neuron e whai ake nei. Koinei te wāhi e tukuna ai ngā nekehanga io mai i tētahi neuron ki tētahi atu.
Pātai 2: Ngā Ara Tuku Iho o te Io
Pātai: Whakamāramahia me pēhea te haere o te nekehanga o te io mā roto i tētahi neuron tae noa ki te taenga atu ki tētahi atu neuron!
Kōrero:
1. Te Tukunga o te Hihiri: Ka tīmata ngā hihiri o te io i roto i ngā dendrite ina whiwhi tohu matū mai i ngā neuron tata, i ngā whakaohooho o waho rānei, ka hurihia hei hihiri hiko.
2. Te Tukunga mā te Tinana Pūtau: Kātahi ka tukuna te hiko ki te tinana pūtau, ka tukatukahia ki reira, ā, ki te kaha, ka tukuna ki te axon.
3. Te Tukunga mā te Axon: Ko te axon te ara e kawe ana i ngā hikohiko mai i te tinana pūtau ki te pito o te axon. E mōhiotia ana tēnei tukanga ko te tuku hikohiko, ko te pūmanawa mahi rānei. Ka tiakina ngā axon e te paparanga myelin, e āhei ai te tuku tere me te whai hua o te hikohiko.
4. Te Tuku ki Ētahi Atu Neuron: I te pito o te axon, ka whakaohohia e te nekehanga hiko te tukunga o ngā neurotransmitters ki roto i te synapse. Ka whiti ngā neurotransmitters i te kapiti synaptic ka herea ki ngā kaiwhakawhiwhi i runga i ngā dendrites o te neuron e whai ake nei, ka tīmata i tētahi nekehanga hou i roto i taua neuron.
Pātai 3: Pūnaha Io Matua me te Pūnaha Io Tahataha
Pātai: Whakatauritea te hanganga me te mahi o te pūnaha io matua me te pūnaha io taha!
Kōrero:
– Pūnaha Io Matua (CNS): Kei roto ko te roro me te taurakira. Ko te roro te kaiwhakahaere o ngā mahi tinana pēnei i te whakaaro, te mahara, me ngā kare ā-roto, ko te taurakira ia te kawenga mō te tuku i ngā kare ā-roto i waenga i te roro me ētahi atu wāhanga o te tinana, me te whakahaere hoki i ngā urupare o te tinana.
– Pūnaha Io o te Taitapa (PNS): He io e hono ana i te CNS ki ngā whekau tautoko. E rua ngā wāhanga o te PNS:
1. Pūnaha Io Tinana: Whakahaere i te nekehanga o ngā uaua me te tuku kōrero mai i ngā kaiwhakawhiwhi rongo ki te CNS.
2. Pūnaha Io Motuhake: E whakahaere ana i ngā mahi ā-tinana kāore i te āta whakaarohia pērā i te tere o te manawa me te nakunaku. Kua wehea anō te pūnaha io motuhake ki te pūnaha io atawhai (e piki ake ana i te wā ahotea) me te pūnaha io parasympathetic (e whakamarie ana).
Pātai 4: Te Mahi me te Tūranga o ngā Pūtau Glial
Pātai: He aha te rerekētanga i waenga i ngā neuron me ngā pūtau glial, ā, he aha te mahi a ngā pūtau glial?
Kōrero:
– Ngā Neuron: Ko rātou te kawenga mō te tuku i ngā nekehanga io. E ai ki te whakamārama, ko ngā neuron he dendrite, he tinana pūtau, he axon, me ngā synapses.
– Ngā Pūtau Glial: Ngā pūtau tautoko i roto i te pūnaha io kāore e whai wāhi ki te tuku i ngā akiaki io engari he mea nui mō te mahi a te neuron. Ko ngā mahi a ngā pūtau glial ko:
1. Te Whakarato Kai me te Tautoko: Te whakarite kia whiwhi ngā neurons i te nui o te hāora me ngā matūkai.
2. Te Whakakore i ngā Para Pūtau: Ka uru ki te whakatika i ngā neuron kua pakaru me te tango i ngā para mai i ngā pūtau io.
3. Āwhina i te Hanganga o te Myelin: Ka tere ake te tuku i ngā nekehanga o te io mā te hanga i tētahi paparanga myelin huri noa i ngā axons.
Te Katinga
He mea nui te mahi a te pūnaha io i roto i te whakakotahitanga me te whakahaere i te tinana, mai i ngā mahi pūoko me ngā mahi ā-tinana. Ko te mārama ki te hanganga me te mahi a te pūnaha io, tae atu ki ngā mahi a ngā neuron me ngā pūtau glial, he mea nui ki te wetewete i ngā mea ngaro o te mahi a ō tātou tinana. Mā te matapaki i ngā tauira pātai i runga ake nei, ko te tumanako ka whakaratohia he māramatanga mārama ake, he mārama ake hoki mō te pūnaha io.
Ko te tumanako ka āwhina tēnei tuhinga ki te whakanui ake i te māramatanga ki ngā ariā taketake o te pūnaha io, me te akiaki i te hiahia ki te tūhura haere i te mara o te koiora io.
