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GIT- salivary secretion

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1GIT- salivary secretion Empty GIT- salivary secretion Thu May 12, 2011 7:38 am

ayunishafaf

ayunishafaf
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salam,
dlm salivary duct mmg ad aldosterone ker??
(m/s 17)-"aldosterone increases K+ conc and reduce Na+ conc of saliva in action similar to its action on kidney,

ke aldosterone tuh dye bwk skli dri blood?

2GIT- salivary secretion Empty Re: GIT- salivary secretion Thu May 12, 2011 8:24 am

nisa mohd zaidan


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ayunishafaf wrote:salam,
dlm salivary duct mmg ad aldosterone ker??
(m/s 17)-"aldosterone increases K+ conc and reduce Na+ conc of saliva in action similar to its action on kidney,

ke aldosterone tuh dye bwk skli dri blood?

shapap.hormone (aldosterone) mmg carried by blood en.utk tgk aldosterone action refer pg77endocrine (tp, xde specifically action on salivary Gland).

3GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 12:45 am

afnan fakhrurazi

afnan fakhrurazi
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wah , lajunyer post.. xsempat pun nk revise lecture..

search dlm tenet ckp yg main function aldosterone ni to control body mineral concentration..

so mybe aldosterone ni spread all out of the body untuk regulate tp kebanyakkan dia explain function aldosterone and renin in renal tubules..

tp ada jugk yg dia ckp aldosterone ni ada dlm gland2 , sperti salivary gland yg menggunakan muscarinic receptor ( ach )..

time kasih bukak soklan ni, sebab at least bleh gak blek2 buku balik..

4GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 12:49 am

afnan fakhrurazi

afnan fakhrurazi
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nk tnya soklan ,

kenapa dlm GIT secretion , ( stomach , salivary , pancreatic ) dia akan secrete bicarbonate ion? adakah ni mechanism exchange dgn sodium ? sama mcm dlm kidney ? @ nk maintain acid base balance ?

5GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 2:27 am

ayunishafaf

ayunishafaf
Star Member
Star Member

klau kt salivary tu,
sbb in exchange with chloride

cmni, Na+ actively reabsorped yg tarik chloride skli( passive reabsoprtion of chloride
so in exchange with chloride(sbb nk balance charge kut), bicarbonate gnti

kt stomach, bicarbonate ion di secrete ker?

yg pancreas lak, dr ad kater importance to secrete bicarbonate is to reduce acidity of chyme evacuated from stomach

cm2 lah kut... stkt yg fhm laar.. org len mgkin bleh tlg jelskn lgi kut

6GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 2:30 am

ayunishafaf

ayunishafaf
Star Member
Star Member

dr ade kter bicarbonate pntg tuk reduce acidity of food/content

kt mouth, food is acidic, sbb tu kne ad bicarbonate kut
kt pancreas, sbb acidic chyme from stomach..



7GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 2:48 am

ayunishafaf

ayunishafaf
Star Member
Star Member

nisa mohd zaidan wrote:
ayunishafaf wrote:salam,
dlm salivary duct mmg ad aldosterone ker??
(m/s 17)-"aldosterone increases K+ conc and reduce Na+ conc of saliva in action similar to its action on kidney,

ke aldosterone tuh dye bwk skli dri blood?

shapap.hormone (aldosterone) mmg carried by blood en.utk tgk aldosterone action refer pg77endocrine (tp, xde specifically action on salivary Gland).

kter fhm mksud nisa', hehe, xdi ad tye org lam kelas
mksudnyer, aldosterone lam blood travel smpai kt byk destinasi.. n salah stunyer kt salivary gland
pastu dye act on salivary gland.. similar to its action on kidney..

8GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 5:16 am

afnan fakhrurazi

afnan fakhrurazi
Pro Member
Pro Member

owh, kiranya ada function yg specific la, bukan hnya untuk exchange j..thanks la..nk mintax pandangan je..

9GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 7:28 am

ayunishafaf

ayunishafaf
Star Member
Star Member

sori, bce smule, bru pasan tadi
yg dimksudkn bicarbonate secretion kt stomach tu... together with mucus cell kah?? (m/s 22)?

rsenyer, yg tu kne rujuk mucosal barrier(m/s 26)

nie yg fhm laarr..
mucus tu kn function dye utk protect epithelium of stomach from acidic secretion of stomach
so, care dye by reducing the pH gradually across the mucus layer

dlm gel layer tuh, dye punyer pH mcm berperingkt
imagine satu epithelial cell.. kat atas dye ad gel layer, then gastric lumen,
dalam gel layer, yg pling dekt ngn cell, kt situ pling byk bicarbonate...
yg pling dekt ngn lumen plak.. paling sikit bicarbonate ion

acid secretion(lowpH/ high H+)dlm lumen.. H+ are trapped, msuk lam gel... so, H+ react ngn bicarbonate..tukr jd H2O n C02..
so pH dye jd lower laa sbb H+ makin kurg
bler makin dekt dgn cell, H+ akn jumpe ngn lagik byk bicarbonate ions, akn react > tukr jd water n CO2
smpai last skli, pling dekt ngn cell (contain highest bicarbonate)... pH dye akn bertukr jd 7
so, selmt laa cell tue..

sori klau citer p x bpe fhm.. rsenyer cm 2 laa... ini pndpt sndri leps dgr dr citer, x taw betul ke x


10GIT- salivary secretion Empty Re: GIT- salivary secretion Fri May 13, 2011 8:20 am

afnan fakhrurazi

afnan fakhrurazi
Pro Member
Pro Member

thanks..sudah faham da..
kira betulla, bicarbonate mane2 disecreted untuk acid base balance la..xkira mane2 pun..

11GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 12:54 am

ayunishafaf

ayunishafaf
Star Member
Star Member

leh x tlg citer *long vagovagal reflexes
ngn *local enteric reflexes-esp ayat nie-
postganglionic neurons in local reflex arc are the same ones innervated by descending vagal fibres that mediate cephalic phase of secretion? (pe lak kaitn ngn cephalic phase tetibe? local reflex arc dye ckp pe ek?)

m/s 28

12GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 4:45 am

frenzyfish

frenzyfish
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ayunishafaf wrote:leh x tlg citer *long vagovagal reflexes
ngn *local enteric reflexes-esp ayat nie-
postganglionic neurons in local reflex arc are the same ones innervated by descending vagal fibres that mediate cephalic phase of secretion? (pe lak kaitn ngn cephalic phase tetibe? local reflex arc dye ckp pe ek?)

m/s 28

dgn nama Allah yg Maha Pemurah lagi Maha Mengasihani...

long vagovagal reflexes dah settle kan??...food enter stomach-distention of wall-stimulate mechanical receptors-send signal to medulla(dorsal motor nucleus of vagus) via afferent fibres of vagus-medulla send signal to stomach wall via efferent fibres of vagus-decrease muscular tone of wall-enable filling of stomach with a lot of food..

local enteric reflex plop-mcm bese,copy dlm tenet...

local enteric reflex=enteric nervous system

The enteric nervous system (ENS) is a subdivision of the peripheral nervous system (PNS), that directly controls the gastrointestinal system.

Function

"The ENS is capable of autonomous functions such as the coordination of reflexes, although it receives considerable innervation from the autonomic nervous system and thus is often considered a part of the ANS."

yg sy faham,local enteric reflex sebahagian drpd autonomic nervous system.....sbb ENS BLEY CONTROL REFLEX MCM aper yg long vagovagal reflex wat....


Anatomy
The enteric nervous system is embedded in the lining of the gastrointestinal system.
The neurons of the ENS are collected into two types of ganglia: myenteric (Auerbach's) and submucosal (Meissner's) plexuses.[8]Myenteric plexuses are located between the inner and outer layers of the muscularis externa, while submucosal plexuses are located in the submucosa.


postganglionic neurons in local reflex arc are the same ones innervated by descending vagal fibres that mediate cephalic phase of secretion? (pe lak kaitn ngn cephalic phase tetibe? local reflex arc dye ckp pe ek?)

ni explanation dier KOWT....
"The enteric nervous system has been described as a "second brain". There are several reasons for this. The enteric nervous system can operate autonomously. It normally communicates with the CNS through the parasympathetic (eg, via the vagus nerve) and sympathetic (eg, via the prevertebral ganglia) nervous systems."

cephalic phase(page 27) totally citer tntg cepahalic phase ni sepenuhnye dikawal oleh vagus sahaja.maksud nervous controlled tu, aper2x shj above stomach(cerebral cortex,amygdala,hypothalamus,mknn masuk mulut) bley anto signal ker stomach utk increase secretion melalui vagus nerve...
(preganglionic-postganglionic neuron)

local enteric reflex dlm gastric phase berlaku biler mknn dah smpai dlm perut,stimulate local enteric reflex td,(second brain),x pyh peg brain dah,tp bley anto signal dgn cpt melalui reflex ni.(spinal cord).tp dgn postganglionic neuron yg samer dgn cephalic phase(mcm ayat dlm buku teks)....

"vertebrate studies show that when the vagus nerve is severed, the enteric nervous system continues to function."(enteric reflex cumer share postganglionic neuron jerrr)



NOTES:


In vertebrates the enteric nervous system includes efferent neurons, afferent neurons, and interneurons, all of which make the enteric nervous system capable of carrying reflexes and acting as an integrating center in the absence of CNS input.

The sensory neurons report on mechanical and chemical conditions. Through intestinal muscles, the motor neurons control peristalsis and churning of intestinal contents.

Other neurons control the secretion of enzymes. The enteric nervous system also makes use of more than 30 neurotransmitters, most of which are identical to the ones found in CNS, such as acetylcholine, dopamine, and serotonin. The enteric nervous system has the capacity to alter its response depending on such factors as bulk and nutrient composition.

kalo melalut,sila btolkan yerrr..

affraid affraid affraid affraid

13GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 6:46 am

ayunishafaf

ayunishafaf
Star Member
Star Member

local reflex arc= local enteric reflex kah??

so, local enteric reflex ,maksudnyer mcm nie ker??
stretch+chemical stimuli > receptor> sensory fibers enter submucous plexus> postganglionic parasymp neurons(iaitu postganglionic fibers a.k.a efferent of cephalic stimulatory phase)> parietal cell> inc acid secretion

14GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 6:59 am

frenzyfish

frenzyfish
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ayunishafaf wrote:local reflex arc= local enteric reflex kah??

so, local enteric reflex ,maksudnyer mcm nie ker??
stretch+chemical stimuli > receptor> sensory fibers enter submucous plexus> postganglionic parasymp neurons(iaitu postganglionic fibers a.k.a efferent of cephalic stimulatory phase)> parietal cell> inc acid secretion

sy faham mcm shafaf.....local enteric reflex keje samer2x dgn long vagovagal reflex cumer dier x relay kat otak...local reflex arc tu ialah pathway bg local enteric reflex...mcm withdrawal reflex arc dlm withdrawal reflex(afferent-interneuron -efferent)

wallahua'lam....

15GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:04 am

afnan fakhrurazi

afnan fakhrurazi
Pro Member
Pro Member

wah frenzy fish.. panjang gile explaination, bleh buat buku satu lagi lah..mengalahkan hassan eissa...kah2..

nk join jugk ah, tp xleh explain bnyak2 sngt, xstudy ag.apa yg doc ckp ai tu gini..

1- vagovagal ni = vago ( afferent kpd cns ) vagal ( efferent drpd cns )..
2- stimulus dia dgn presence of food ( sama mcm local enteric gastris ) * using streching receptor , chemoreceptor n dll
3- apabila dia arc, ada pathway yg perlu neurotransmitter, ( ach, stimulatory neurotransmitter ) , so dia activate release of H ion ..
4- decresed muscle tone juga betul..

local enteric reflexes plak, doc ckp dia pasal presence of food..* rasanya same j dgn atas tuh!!

dia ada kaitan dgn cephalic phase tu sebab dia dlm kategori anatomic nervous system ( dia cuma kaitan dr segi effernet innervation j )* rasse2 kot

- nk senang bygkan jela gini, rase2 dia sebenrnya serentak tp dia pisahkan ikut part2..
-kan mknan tu mula2 dia di stimulate oleh bau, tp dlm masa tu dia dah stimulate dah gastric secretion..
- so pasal2 kaitan tu rase gitula..dia function dlm satu mechanism..

* sekadar pandangn untuk diri sendiri j ni..bru baca ni, trima kasih kpd penanya soklan..dapat juga diri ni belek buku walau cikit..

p/s : kpd booklover tuh, cepat2 naik pangkat yer.. jadi star member plak..kah2

16GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:05 am

afnan fakhrurazi

afnan fakhrurazi
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kalau ada silap habaq mai..bru bukak buku ni

17GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:19 am

frenzyfish

frenzyfish
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afnan fakhrurazi wrote:kalau ada silap habaq mai..bru bukak buku ni

hohohoh....yessss.....tak grade lg dah bley jd head department....... Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy

bkn taip pown,google2x,copy paste jer....aper susah...

raser nyer,paham mcm tu dah..... What a Face What a Face What a Face What a Face

18GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:27 am

afnan fakhrurazi

afnan fakhrurazi
Pro Member
Pro Member

patutla ayat cm susah cikit nk faham.. bak mai google..tp bgus la, meluaskan lagi kefahaman..

tp vagovagal rflex xrelay kat otak?? apa ,mksud tu?? komen2 yg sebelum2 tu

19GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:31 am

ayunishafaf

ayunishafaf
Star Member
Star Member

afnan fakhrurazi wrote:patutla ayat cm susah cikit nk faham.. bak mai google..tp bgus la, meluaskan lagi kefahaman..

tp vagovagal rflex xrelay kat otak?? apa ,mksud tu?? komen2 yg sebelum2 tu

yg mas maksudkn x relay tu... local enteric reflex... log vago vagal relay kt otk
kan mas?

20GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:36 am

frenzyfish

frenzyfish
Book Lovers
Book Lovers

ayunishafaf wrote:
afnan fakhrurazi wrote:patutla ayat cm susah cikit nk faham.. bak mai google..tp bgus la, meluaskan lagi kefahaman..

tp vagovagal rflex xrelay kat otak?? apa ,mksud tu?? komen2 yg sebelum2 tu

yg mas maksudkn x relay tu... local enteric reflex... log vago vagal relay kt otk
kan mas?

.local enteric reflex keje samer2x dgn long vagovagal reflex cumer dier x relay kat otak...local reflex arc tu ialah pathway bg local enteric reflex...mcm withdrawal reflex arc dlm withdrawal reflex(afferent-interneuron -efferent)

hohohoh...sori laaa...ayat mcm ular kena palu....."dier " merujuk kpd local enteric reflex....luper nk ltk koma..
ayuni shafaf mmg tere bacer ayat2x kena palu ney...sbb dier kan booklover...wakakakaka Laughing Laughing Laughing Laughing Laughing Laughing Laughing Laughing

21GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:46 am

ayunishafaf

ayunishafaf
Star Member
Star Member

frenzyfish wrote:
ayunishafaf wrote:
afnan fakhrurazi wrote:patutla ayat cm susah cikit nk faham.. bak mai google..tp bgus la, meluaskan lagi kefahaman..

tp vagovagal rflex xrelay kat otak?? apa ,mksud tu?? komen2 yg sebelum2 tu

yg mas maksudkn x relay tu... local enteric reflex... log vago vagal relay kt otk
kan mas?

.local enteric reflex keje samer2x dgn long vagovagal reflex cumer dier x relay kat otak...local reflex arc tu ialah pathway bg local enteric reflex...mcm withdrawal reflex arc dlm withdrawal reflex(afferent-interneuron -efferent)

hohohoh...sori laaa...ayat mcm ular kena palu....."dier " merujuk kpd local enteric reflex....luper nk ltk koma..
ayuni shafaf mmg tere bacer ayat2x kena palu ney...sbb dier kan booklover...wakakakaka Laughing Laughing Laughing Laughing Laughing Laughing Laughing Laughing

apelah sgt booklover kter klau nk bnding ngn booklover mas.... laju jer kutip bintg Like a Star @ heaven Like a Star @ heaven

22GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 7:55 am

frenzyfish

frenzyfish
Book Lovers
Book Lovers

ayunishafaf wrote:
frenzyfish wrote:
ayunishafaf wrote:
afnan fakhrurazi wrote:patutla ayat cm susah cikit nk faham.. bak mai google..tp bgus la, meluaskan lagi kefahaman..

tp vagovagal rflex xrelay kat otak?? apa ,mksud tu?? komen2 yg sebelum2 tu

yg mas maksudkn x relay tu... local enteric reflex... log vago vagal relay kt otk
kan mas?

.local enteric reflex keje samer2x dgn long vagovagal reflex cumer dier x relay kat otak...local reflex arc tu ialah pathway bg local enteric reflex...mcm withdrawal reflex arc dlm withdrawal reflex(afferent-interneuron -efferent)

hohohoh...sori laaa...ayat mcm ular kena palu....."dier " merujuk kpd local enteric reflex....luper nk ltk koma..
ayuni shafaf mmg tere bacer ayat2x kena palu ney...sbb dier kan booklover...wakakakaka Laughing Laughing Laughing Laughing Laughing Laughing Laughing Laughing

apelah sgt booklover kter klau nk bnding ngn booklover mas.... laju jer kutip bintg Like a Star @ heaven Like a Star @ heaven

hohohoh..persaingan sehat.....jom shafaf ,kutip bintang yg ader,,,,,

23GIT- salivary secretion Empty Re: GIT- salivary secretion Sat May 14, 2011 9:41 am

afnan fakhrurazi

afnan fakhrurazi
Pro Member
Pro Member

tuhla yg heran..sebab masih segar ag, doc bgtau lain..lain kali jgn gaduh2, letak koma baik2..kah2..
trime kasih sebab membukak tajuk menyebabkan kena bukak buku..

*lain kali bkak la tajuk lagi ( even rasa mcm da paham )

p/s : wah2, mkin bertambah booklovers...cepat2 kutip bintang yer.. Like a Star @ heaven Like a Star @ heaven Like a Star @ heaven Like a Star @ heaven

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