bendra Flashcards

1
Q

nervu sistema -

A

centrine
galvos ir nugaros raumenys

perifine
1. nervai
2. nerviniai mazginiai
3. nerviniai rezginiai

somatine
reguliuoja griauciu raumenis (valingai)

autonomine (vegetacine)
reguliuoja vidaus organus (nevalingai)

simpatine
parasimpatine

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2
Q

simpatine ir parasimpatine

A

jos veikia priesinga viena kitai. jei viena dirgina, kita slopina

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3
Q

neurono sandara

A
  1. Kunas
    a) Branduolys
    b) Mitochondrijos (labai daug)
    c) Kitos organeles
  2. Ataugos
    a) Dendritai - Sakoti, labai daug, trumpi
    b) Aksonas - ilgi (1m - 1,30m), padengti mielino dangalu (baltymai)
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4
Q

Dedritu funkcija -

A

nerviniai impulsai perduodami i neurono kuna.

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5
Q

Aksono funkcija -

A

is neurono kuno nerviniai impulsai perduodami i raumenis arba kitus organus.

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6
Q

Neuronu rusys:

A
  1. Juntamieji – impulsai sklinda is jutimo organu I CNS ( centrine nervu Sistema) (sensoriniai)
  2. Judinamasis – impulsai sklinda is CNS I raumenis ar kitus organus ( motoriniai)
  3. Iterptinis – palaiko rysy tarp juntamuju ir judinamuju neuronu.
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7
Q

Reflekso lanko dalys:

A
  1. Receptorius
  2. Juntamasis neuronas
  3. CNS
  4. Judinamasis neuronas
  5. Vykdomasis organas- raumuo arba organas
    Dirginimus junta tam tikri nerviniai dariniai – receptoriai (juntamuju neuron dendritai)
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8
Q

Odoje esantys receptoriai:

A
  1. Skausmo
  2. Lytejimo
  3. Temperaturos
    a) Karscio
    b) Salcio

Organizmo reakcija I dirginima, kuria atlieka ir kontroliuoja CNS vadinama – refleksu

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9
Q

Refleksai:

A
  1. Nesalyginis ( igimtas):
    a) Paveldeti is tevu
    b) Islieka visa gyvenima
    Pvz. Mirksejimas, kosulys, ciaudulys, vemimas, kvepavimo, virskinimo, sirdies darbo, salinimo.
  2. Salyginiai (igyti):
    a) Individualus
    b) Igyjami pasikartojant tam tikriems dirgikliams
    c) Gali isnykti
    Pvz. Vaiksciojimas, plaukiojimas, skaitymas, rasymas, slidinejimas.
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