Poison vs. venom: What's the difference? - Rose Eveleth

Žabji in kačji strup: Kakšna je razlika? - Rose Eveleth

3,065,985 views

2014-02-20 ・ TED-Ed


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Poison vs. venom: What's the difference? - Rose Eveleth

Žabji in kačji strup: Kakšna je razlika? - Rose Eveleth

3,065,985 views ・ 2014-02-20

TED-Ed


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Translator: Grega grega Reviewer: Nika Kotnik
00:06
Would you rather be bitten
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Bi raje videli, da vas piči
00:08
by a venomous snake or touch a poisonous frog?
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kača ali se dotaknili strupene žabe?
00:11
Wait, what's the difference
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Kakšna pa je sploh razlika
00:12
between poison and venom, anyway?
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med žabjim strupom (poison) in kačjim strupom (venom)?
00:15
Let's say you have the misfortune
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Recimo, da imate smolo
00:17
to be bitten by a venomous rattlesnake.
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in vas piči strupena klopotača.
00:19
When it bites you,
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Ko vas piči,
00:20
the snake will eject venom
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vrže kačji strup ven
00:21
from little sacks behind its eyes,
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iz majhnih vreč za očmi
00:22
through its hollow fangs and into your flesh.
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skozi votle strupnike v vaše telo.
00:24
That venom will then travel through your bloodstream
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Ta strup nato potuje skozi kri
00:26
and all over your body.
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in po celem telesu.
00:28
In most cases, snake venom contains neurotoxins,
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V večini primerov vsebuje kačji strup nevrotoksine,
00:30
proteins that can do all sorts of nasty stuff
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beljakovine, ki naredijo grozne stvari
00:32
like make your muscles fire uncontrollably,
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npr. vaše mišice se lahko nenadzorovano prožijo,
00:35
burst your blood cells,
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vaše krvničke popokajo
00:37
and make you go completely numb.
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in lahko povsem ohromite.
00:38
But you might get lucky!
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Ampak lahko imate srečo!
00:40
Snakes don't always decide
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Kače se ne odločijo zmeraj,
00:41
you're worth wasting venom on.
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da ste vredni strupa.
00:42
In fact, between 20 and 80% of snake bites
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V bistvu, med 20 in 80% kačjih pikov
00:44
are so-called "dry bites,"
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je t.i. "suhih pikov",
00:46
where the snake is just trying
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kjer vas kača poskuša le
00:47
to send a message without actually killing you.
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opozoriti, ne da bi vas dejansko ubila.
00:49
You see, venom takes energy and resources
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Veste, kače porabijo energijo in sredstva
00:52
for the snake to make,
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zato, da strup naredijo
00:53
and they don't want to waste it on a warning shot.
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in ne želijo ga zapraviti za opozorilo.
00:55
When it comes to poison,
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Ko gre za žabji strup (poison),
00:56
on the other hand,
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pa po drugi strani,
00:58
there's no warning shot.
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ni opozorila.
00:59
If you pick up a poisonous dart frog
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Če poberete strupeno žabo,
01:01
to admire its beautiful colors,
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da bi občudovali čudovite barve,
01:02
you've already gotten deadly poison
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ste že dobili smrtonosen strup
01:04
all over your hands.
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po celih rokah.
01:06
As it seeps into your skin
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Ko prodre v vašo kožo
01:08
and travels through your blood,
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in potuje skozi kri,
01:09
the poison starts to interfere with your nerves,
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strup začne povzročati motnje živcev
01:11
preventing your muscles from contracting.
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in prepreči vašim mišicam, da bi se skrčile.
01:13
If the frog's poison reaches your heart,
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Če žabji strup doseže vaše srce,
01:15
it can cause it to stop.
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se lahko ustavi.
01:18
The distinction between venom and poison
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Razlika med strupoma
01:19
is purely in the method of delivery.
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je izključno v načinu dostave.
01:21
Poison has to be inhaled, ingested, or absorbed.
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Žabji strup mora biti vdihnjen, zaužit ali absorbiran.
01:24
Venom has to be injected into a wound.
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Kačji strup mora biti vbrizgan v rano.
01:27
Chemically, venoms and poisons
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Kemično, žabji in kačji strupi
01:28
are both considered toxins,
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spadajo med toksine,
01:30
so a snake bite is venomous.
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torej kačji pik je strupen. (Poison)
01:32
A poison dart frog is poisonous.
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Dotik strupene žabe je strupen. (Venom)
01:35
Brown recluse spiders are venomous.
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Rjavi pajki samotarji so strupeni. (Venom)
01:37
Lionfish and pufferfish are poisonous.
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Velike plamenke in ribe napihovalke so strupene. (Poison)
01:40
And some compounds can be poisons in one animal
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Nekatere spojine so vbrizgani strupi v eni živali
01:43
and venoms in another.
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in absorbirani v drugi.
01:44
Tetrodotoxin, a chemical 10,000 times more toxic than cyanide,
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Tetrodotoksin, kemikalija 10.000-krat bolj strupena kot cianid,
01:49
is found in pufferfish,
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se nahaja v ribah napihovalkah,
01:50
where it makes them poisonous.
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zaradi česar so strupene.
01:51
It's also found in the deadly blue-ringed octopus,
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Nahaj se tudi v modroobročkasti hobotnici,
01:54
where it's a venom delivered by bite.
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kjer se strup dostavi z ugrizom.
01:56
Some animals can even be both poisonous and venomous.
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Nekatere živali lahko imajo obe vrsti strupa.
01:59
Take the Asian tiger snake, for example.
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Na primer, azijska tigrasta kača.
02:01
Not only does it have venom in its fangs
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Nima le strupa v svojih strupnikih,
02:03
but it also absorbs the toxins
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ampak tudi absorbira toksine
02:05
from the poisonous toads it eats,
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iz strupenih krastač, ki jih poje
02:07
and then secretes those toxins
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in nato izloči te toksine
02:08
from special glands on its neck,
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s posebnih žlez na vratu,
02:10
rendering it poisonous, too.
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zato je tudi strupena na dotik.
02:12
Scientists are constantly finding new animals
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Znanstveniki nenehno odkrivajo nove živali,
02:14
that employ toxins in weird, interesting ways.
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ki uporabljajo toksine na čudne, zanimive načine.
02:17
Recently, researchers discovered
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Nedavno so raziskovalci odkrili
02:18
the very first venomous crustacean.
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prvega strupenega raka.
02:20
Out of 70,000 species of crustaceans,
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Izmed 70.000 vrst rakov
02:22
only this one little remipede is venomous.
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so samo ti majhni remipedi strupeni.
02:25
Speleonectes tulumensis has figured out
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Tako imenovani jamski raki so ugotovili,
02:27
how to create a cocktail of toxins
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kako pridelati mešanico toksinov,
02:29
that it delivers through its tiny fangs.
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ki gre skozi njihove drobne podočnike.
02:32
Scientists aren't totally sure how this venom works yet,
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Znanstveniki še ne razmejo delovanja strupa,
02:34
but they think that it causes the unwitting victims' neurons
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a menijo, da se živčne celice nevedoče žrtve,
02:36
to fire over and over and over again
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prožijo znova in znova,
02:39
until it becomes paralyzed.
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dokler ne ohromi.
02:41
Then, the little remipede closes in,
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Nato se majhen remiped približa
02:42
dissolving away the exoskeleton of its prey
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in raztopi zunanji skelet plena
02:44
and sucking out the juices.
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in izsesa sokove.
02:46
But poisons and venoms aren't always all bad.
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A strupi na dotik in vbrizgani strupi niso vedno samo slabi.
02:49
For thousands of years, humans have looked for
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Tisočletja so ljudje iskali načine,
02:51
ways to harness the power of these toxic compounds for good.
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da izkoristijo moč teh strupenih mešanic v dobre namene.
02:54
Today, we have all sorts of medicines
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Dandanes imamo vse vrste zdravil,
02:55
that come from toxins.
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narejene iz toksinov.
02:57
The poison from cone snails is used as a painkiller.
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Strup stožčastega polža je sredstvo proti bolečinam.
03:00
Many poisonous plants have been used
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Z mnogo strupenimi rastlinami
03:01
to treat everything from malaria to irregular heartbeats.
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zdravimo vse, od malarije do nepravilnega srčnega utripa.
03:04
And scorpion venom might one day be used
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In strup škorpijona bo nekoč morda
03:06
to treat heart disease.
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zdravil srčne bolezni.
03:08
So, what should you do if something bites or poisons you?
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Torej, kaj bi naredili, če vas nekaj piči ali zastrupi?
03:11
Don't try any of the things you've seen
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Ne poskušajte stvari, ki jih vidite
03:13
on the internet or in movies!
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na internetu ali televiziji!
03:14
Don't try to capture and kill the animal
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Ne poskušajte prijeti in ubiti živali,
03:16
that bit you,
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ki vas je ugriznila
03:17
and don't use a tourniquet or knife on your wound.
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in ne uporabljajte kompresijske obveze ali noža na vaši rani.
03:20
Most importantly, don't panic!
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Najpomembneje, brez panike!
03:23
Stay calm, and seek medical attention.
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Ostanite mirni in poiščite medicinsko oskrbo.
03:26
Treatment will mostly depend
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Zdravljenje je odvisno od
03:28
on what species you encountered.
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živalske vrste, s katero ste se spopadli.
03:29
But if you forget the distinction
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A če pozabite razliko
03:31
between poison and venom,
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med vrstami strupa
03:32
and tell the parademics
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in rečete reševalcem,
03:34
that you were poisoned by a viper,
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da vas je zastrupil gad,
03:35
they'll probably forgive you and treat you anyway.
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vam bodo najverjetneje oprostili in vas vseeno ozdravili.
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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