Cursul 2 Flashcards

1
Q

Ce contine secretia acinara?

A
  • Enzime depozitate in granule de zimogen(aflate la pol apical)
  • H2O + Electroliti
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2
Q

De cine e stimulat HCO3-?

A

De SECRETINA, crescand activitatea schimbatorului HCO3-/CL-

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3
Q

Fibroza chistica

A

Defect al canalelor de CL-(AMPc dependente) si rezulta in precipitarea enzimelor

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4
Q

Volumul secretiei pancreatice

A

1500 ml/zi

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5
Q

Care sunt ENZ proteolitice?

A

Tripsinogen, Chimotripsinogen, Procarboxipeptidaza, Proelastaza, Pronucleaze

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6
Q

Care sunt ENZ lipolitice?

A

Lipaza, Colesterol-ester-hidrolaza, Fosfolipaza

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7
Q

Tripsinogen->Tripsina, sub actiunea cui si unde?

A

Sub actiunea enterokinazei,in intestin(polul apical al enterocitelor)

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8
Q

TRPS,CHMTRPS,CRBXPPTDZ ce scindeaza?

A

Scindaza polipeptidele-> oligopeptide, di,tripeptide si AA

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9
Q

Elastaza ce scindeaza?

A

Elastina-> AA

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10
Q

Nucleazele ce scindeaza?

A

Ac nucleici-> nucleotide

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11
Q

De catre cine este activata si inhibata secretia acinara?

A

Activata de CCK + gastrina, GRP

Inhibata de SOMATOSTATINA

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12
Q

Ce determina scaderea ph<4.5(acid)?

A

Eliberarea de secretina, care creste secretia ductala(bogata in HCO3-)

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13
Q

Ce este bila ductala?

A

O solutie apoasa de NaHCO3

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14
Q

Care sunt factiunile etapei hepatice?

A

Fractiunea colalo-dependenta(exclusiv in ficat)

Fractiunea colalo-independenta(sintetizata de caile biliare)

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15
Q

Volum bila hepatica si ductala

A

600-1000ml/zi

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16
Q

pH bila hepatica si ductala

A

7.8-8.6

17
Q

Volum bila veziculara

A

20-60 ml/zi

18
Q

pH bila veziculara

A

7-7.4

19
Q

Care este cauza litiazei biliare?

A

Cresterea exagerata a Ca2+ + colesterol

20
Q

De cate ori se repeta circuitul entero-hepatic si cate g de SB/ciclu implica?

A

Se repeta de 4-12x/zi si implica 3-3.5 g SB/ciclu

21
Q

Ce se intampla cu cele 95% din SB? dar cu cele 5%?

A

Cele 95% se reabsorb prin vena porta,captate de hepatocit si reexcretate, iar cele 5% se pierd prin fecale.e sau eliminate prin urina in cantitati mici

22
Q

Care sunt acizii biliari primari si unde se formeaza?

A

Sunt acidul colic si acidul chenodeoxicolic, in hepatocit din colesterol

23
Q

Care sunt acizii biliari secundari si unde se formeaza?

A

Sunt acidul deoxicolic si litocolic,in intestin, sub actiunea florei microbiene

24
Q

Cum apare Bilirubina D?

A

In hepatocit, BI este conjugata cu acid glucuronic, sub actiunea glucoronil-transferazei

25
Q

Traseul Ubg-ului

A

BD, oxidat in Urobilinogen, sub actiunea florei bacteriene,o parte mergand pe calea venei porte,apoi reexcretat prin bila, o parte trece in sange si apoi eliminata prin urina, iar ultima parte este eliminata in stercobilinogen, prin materii fecale, sub forma stercobilinei

26
Q

Volumul secretiei int. subtire

A

1500 ml/zi(izotona)

27
Q

pH-ul secretiei int. subtire

A

7.5-8

28
Q

Volumul secretiei int. gros

A

200ml/zi(izoton, intens alcalin, fara enzime)

29
Q

Ce face flora de fermentatie(85%)?

A

degradarea glucidelor in CO2 si acizi organici

30
Q

Ce face flora de putrefactie?(15%)?

A

degradarea proteinelor in AA toxici( inodol,scatol)

31
Q

Cantitatea materiilor fecale

A

50-100g/zi

32
Q

pH- materiilor fecale

A

7.5