Histologia - Túbulo contorcido proximal Flashcards

1
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2
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3
Q

Qual o tecido do TCP?

A

Epitélio simples cuboide

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4
Q

Como são as células do TCP?

A

Células largas - em cada corte transversal de um TCP aparecem apenas tres a quatro núcleos esféricos.

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5
Q

Como é o citoplasma do TCP?

A
  • Citoplasma basal fortemente acidófilo (numerosas mitocôndrias alongadas)
  • Citoplasma apical apresenta microvilos, que formam a orla em escova.
    • Lembrando que as microvilosidades são revestidas por glicocálice que contém ATPases, peptidases e dissacaridases.
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6
Q

O que o TCP apresenta como característica?

A
  • Apresenta AQP-1: pequena proteina que funciona como canal de agua, localizado na membrana das células.
  • Apresenta lúmens amplos.
  • São células circundadas por muitos capilares sanguíneos.
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16
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17
Q

Cite 4 substancias reabsorvidas nesse tecido?

A

Células do túbulo contorcido proximal

Reabsorve cerca de 70% da água, Na+, Cl-, K+ e outros solutos filtrados

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