What does the pancreas do? - Emma Bryce

Kaj počne trebušna sinavka? - Emma Bryce

1,025,203 views

2015-02-19 ・ TED-Ed


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What does the pancreas do? - Emma Bryce

Kaj počne trebušna sinavka? - Emma Bryce

1,025,203 views ・ 2015-02-19

TED-Ed


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Translator: Nika Kotnik Reviewer: Jonathan Rebetz
00:06
Beneath your ribs, you'll find, among other things, the pancreas,
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Pod svojimi rebri lahko med drugim najdemo tudi trebušno slinavko,
00:11
an organ that works a lot like a personal health coach.
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organ, ki deluje podobno kot osebni zdravstveni pomočnik.
00:15
This organ controls your sugar levels and produces a special juice
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Ta organ nadzoruje našo raven sladkorja in proizvaja poseben sok,
00:20
that releases the nutrients from your food
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ki sprošča hranila iz hrane
00:22
to help keep you in the best possible shape.
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in nam s tem pomaga ostati v najboljši formi.
00:26
The pancreas sits just behind your stomach,
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Trebušna slinavka se nahaja tik za želodcem -
00:28
an appropriate home, as one of its jobs is to break down the food you eat.
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na primernem mestu, saj je ena od njenih nalog razgradnja hrane, ki jo pojemo.
00:33
It aids digestion by producing a special tonic made of water,
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Prebavi pomaga z izdelovanjem posebnega tonika, narejenega iz vode,
00:38
sodium bicarbonate,
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sode bikarbone,
00:39
and digestive enzymes.
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in prebavnih encimov.
00:42
Sodium bicarbonate neutralizes the stomach's natural acidity,
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Soda bikarbona nevtralizira naravno kislost želodca,
00:46
so these digestive enzymes can perform their jobs.
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da lahko prebavni encimi opravljajo svoje naloge.
00:50
Lipase breaks down fatty substances,
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Lipaza razgradi maščobe,
00:53
protease splits up proteins,
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proteaza razgradi beljakovine,
00:56
and amylase divides carbohydrates to create energy-rich sugars.
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amilaza pa razcepi ogljikove hidrate, da dobimo energijsko bogate sladkorje.
01:00
Most of those nutrients then get absorbed into the blood stream,
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Večina teh hranil se nato vsrka v kri
01:03
and go on to enrich the body.
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in potuje naprej, da bi obogatila telo.
01:06
While all this is happening, the pancreas works on another critical task,
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Medtem ko se vse to dogaja, trebušna slinavka opravlja še eno pomembno nalogo,
01:11
controlling the amount of sugar in your blood.
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nadzoruje raven sladkorja v naši krvi.
01:13
It achieves this with the hormones insulin and glucagon,
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To doseže s hormonoma inzulinom in glukagonom,
01:17
which are produced in special cells called the Islets of Langerhans.
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ki nastajata v posebnih celicah, imenovanih Langerhansovi otočki.
01:22
Having too much or too little sugar can be life threatening,
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Preveč ali premalo sladkorja v krvi je lahko življenjsko nevarno,
01:25
so the pancreas must stay on constant alert.
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zato mora biti trebušna slinavka stalno na preži.
01:28
After a big meal, the blood often becomes flushed with sugar.
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Po velikem obroku kri velikokrat postane prepolna sladkorja.
01:32
To bring us back to normal, the pancreas releases insulin,
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Da nas povrne v normalno stanje, trebušna slinavka sprosti inzulin,
01:36
which makes the excess sugar move into cells,
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ki premakne odvečni sladkor v celice,
01:39
where it's either used as an energy source, or stored for later.
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kjer se ta porabi kot vir energije ali pa se shrani za pozneje.
01:44
Insulin also tells the liver to shut down sugar production.
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Inzulin hkrati da jetrom ukaz, naj ustavijo proizvodnjo sladkorja.
01:47
On the other hand, if blood sugar is low,
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Po drugi strani pa, če je krvni sladkor nizek,
01:50
the pancreas releases a hormone called glucagon
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trebušna slinavka sprosti hormon glukagon,
01:53
that tells the body's cells and liver to release stored sugars
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ki ukaže celicam telesa in jeter, naj sprostijo uskladiščen sladkor
01:57
back into the bloodstream.
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nazaj v krvni obtok.
01:59
The interplay between insulin and glucagon is what keeps our sugar levels balanced.
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Medsebojno delovanje inzulina in glukagona poskrbi za uravnovešeno raven sladkorja.
02:04
But a faulty pancreas can no longer coach us like this,
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Slaba trebušna slinavka pa nas ne more nadzirati na tak način,
02:08
meaning that this healthy balance is destroyed.
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kar pomeni, da je zdravo ravnovesje uničeno.
02:11
If it's weakened by disease,
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Če jo oslabi bolezen,
02:13
the organ's ability to produce insulin may be reduced, or even extinguished,
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se sposobnost tega organa, da proizvaja inzulin, zmanjša ali celo povsem izgine,
02:17
which can trigger the condition known as diabetes.
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kar lahko sproži stanje, znano kot sladkorna bolezen.
02:21
Without regular insulin release, sugar steadily builds up in the blood,
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Brez rednega sproščanja inzulina se sladkor nabira v krvi,
02:25
eventually hardening the blood vessels and causing heart attacks,
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sčasoma zatrdi krvne žile in povzroči srčne napade,
02:29
kidney failure,
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odpoved ledvic in kapi.
02:30
and strokes.
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Pomanjkanje inzulina prikrajša celice za sladkor, bogat z energijo,
02:32
The same lack of insulin deprives cells of the energy-rich sugar
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02:35
they need to grow and function.
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ki ga potrebujejo za rast in delovanje.
02:37
People with diabetes also tend to have higher levels of glucagon,
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Ljudje z diabetesom imajo pogosto tudi višjo stopnjo glukagona,
02:41
which makes even more sugar circulate.
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ki povzroči, da kroži še več sladkorja.
02:44
Without this internal health coach, our sugar levels would go haywire,
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Brez tega notranjega pomočnika, bi se našim ravnem sladkorja zmešalo
02:48
and we wouldn't be able to digest important nutrients.
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in ne bi mogli prebaviti pomembnih hranil.
02:51
But like any coach,
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A ni le trebušna slinavka tista, ki nas ohranja zdrave.
02:53
it's not the pancreas' job alone to keep us healthy.
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02:56
It needs our conscious participation, too.
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Potrebuje tudi naše zavestno sodelovanje.
O tej spletni strani

Na tem mestu boste našli videoposnetke na YouTubu, ki so uporabni za učenje angleščine. Ogledali si boste lekcije angleščine, ki jih poučujejo vrhunski učitelji z vsega sveta. Z dvoklikom na angleške podnapise, ki so prikazani na vsaki strani z videoposnetki, lahko predvajate videoposnetek od tam. Podnapisi se pomikajo sinhronizirano s predvajanjem videoposnetka. Če imate kakršne koli pripombe ali zahteve, nam pišite prek tega obrazca za stike.

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