Segmentele unui analizator Flashcards

1
Q

Ce sunt analizatorii?

A

sisteme morfofunctionale complexe si unitare care au rolul de a receptiona, conduce si transforma in senzatii specifice excitatiile primite din mediul extern sau intern

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2
Q

Din ce segmente sunt alcatuiti analizatorii dpdv anatomic?

A

periferic, intermediar si central

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3
Q

Cum se mai numeste segmentul periferic al analiztorului?

A

receptorul

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4
Q

De ce este reprezentat segmentul periferic?

A

structuri specializate ale organelor de simt

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5
Q

De ce este stimulat segmentul periferic?

A

de variatia unei anumite forme de energie

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6
Q

Ce determina segmentul periferic?

A

formarea potentialului de receptor care se poate forma in potential de actiune

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7
Q

Cum se mai numeste segmentul intermediar al analizatorilor

A

de conducere

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8
Q

Din ce este alcatuit segmentul intermediar?

A

din caile nervoase prin care potentialele de actiune formate la nivelul receptorilor ajung la centrii nervosi superiori

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9
Q

Ce face segmentul intermediar?

A

conduce de la receptori mesaje sub forma de impulsuri nervoase

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10
Q

De ce este reprezentat segmentul central?

A

de aria din scoarta cerebrala la care ajunge calea de conducere

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11
Q

Ce face segmentul central?

A

transforma in senzatii specifice informatiile primite

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12
Q

Cum pot fi clasificati receptorii in functie de topografie?

A

exteroceptori (in piele), proprioceptorii (in sist locomotor), interoceptori (in peretii viscerelor)

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13
Q

Cum pot fi clasificati receptorii dupa natura excitantului?

A

-mecanoreceptori (stimulati de atingere, presiune, lovire, distensie)
-termoreceptori
-algoreceptori (stimulati de orice excitant care produce dureri)
-chemoreceptori (stimulati de modificarea concentratiilor unor substante)
-electromagnetice

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14
Q

Cum pot fi clasificati receptorii dupa distanta de la care actioneaza stimulul?

A

de contact & de distanta

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