Digestia gastrica Flashcards

1
Q

digestia gastrica - def

A

ansamblul proceselor mecanice si chimice de la niv stomacului, prin care alimentele sunt amestecate cu sucul gastric si supuse actiunii enzimatice a lui

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Functiile stomacului

A
  1. acumularea alim care pot fi ingerate la o sg masa
  2. fragmentarea alim in particule mici si amestecarea lor cu sucul gastric, formand chimul gastric
  3. abs apa + subst liposolubile
  4. actiune antibacteriana (lizozimul salivar, aciditatea sucului)
  5. secreta hormoni
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Activitatea majora de amestecare in stomac are loc in:

A

antru

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Viteza de evacuare a solidelor depinde de:

A
  • p intragastrica
  • p intraduodenala
  • rezistenta regiunii pilorice
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Rolurile HCl:

A
  1. digestiv: activeaza pepsinogenul
  2. denatureaza prot
  3. solva colagenul
  4. precipita cazeinogenul din lapte
  5. bactericid
  6. impiedica proc de putrefactie/fermentatie de la niv stomacului
  7. Fe3+ in Fe2+
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

HCl este secretat de:

A

cel oxintice ale glandelor fundice

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Mucina este secretata de:

A

cel epiteliului gastric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Rolurile mucinei:

A
  • protector al mucoasei gastrice de autodigestie

- lubrifiant al particulelor alimentare care trec in duoden

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Factorul intrinsec Castle este secretat de:

A

cel parietale ale stomacului

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Cum actioneaza simpaticul in reglarea secretiei gastrice?

A
  1. direct: asupra cel parietale

2. indirect: asupra cel antrale - stim formarea de gastrina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Mecanisme inhibitorii ale secretiei gastrice:

A
  • enterogastron
  • enteroglucagon
  • acidifierea duodenului
  • secretina
  • peptidul gastro-intestinal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Histamina are actiune:

A

excitanta la nivelul glandelor oxintice

How well did you know this?
1
Not at all
2
3
4
5
Perfectly