Digestia intestinala Flashcards

1
Q

Rolurile miscarilor segmentare:

A
  • amesteca continutul intest cu secretiile intest

- faciliteaza absorbtia

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2
Q

La baza motilitatii intestinale interdigestive sta:

A

complexul motor migrator

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3
Q

Caracteristicile complexului motor migrator:

A
  • nu se suprapun
  • rol de inlaturare a resturilor nedigerate
  • nu se repeta pana la o noua ingestie
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4
Q

Fosfolipaza (enzima pancreatica) are rolul de a:

A

scinda legaturile esterice ale fosfogliceridelor

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5
Q

Prin cresterea conc gastrinei, creste si:

A

aciditatea chimului gastric

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6
Q

Secretia pancreatica, in faza intestinala, este reglata umoral cu:

A
  • secretina: stim celulele ductului pancreatic sa secr suc pancreatic bogat in bicarbonat
  • colecistokinina: stimuleaza eliberarea unei cant mari de enzime pancreatice
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7
Q

Epiteliul vezicii biliare este permeabil pentru:

A

electrolitii anorganici din bila

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8
Q

Rolurile bilei:

A
  1. absorbtia grasimilor - favorizeaza emulsionarea lor si absorbtia acizilor grasi
  2. absorbtia vit liposolubile
  3. cale de excretie a unor subst (Zn, Mg, colest)
  4. efecte laxative prin stimularea motricitatii intestinale
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9
Q

Umoral, reglarea secretiei biliare se realizeaza cu:

A

secretina (o stimuleaza)

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10
Q

Sucul intestinal este secretat de:

A

celulele glandelor Lieberkuhn

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11
Q

Umoral, reglarea secretiei intestinale se realizeaza cu:

A
  • secretina (stimuleaza)

- enterocrinina (se elib la niv mucoasei duodenale in cursul digestiei, stim secretia)

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12
Q

Continenta - def:

A

capacitatea sigmoidului + rectului de a stoca temporar un continut de 500 ml

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13
Q

Defecatia implica:

A

relaxarea sfincterului ext, coborarea planseului pelvin si cresterea unghiului recto-anal

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