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Aardrykskunde

Graad 5

Gesondheid en welsyn

Module 32

Siektes

Almal word van tyd tot tyd siek. Dan besoek ons die plaaslike geneesheer en/of drink die regte medikasie en wag op ‘n spoedige herstel. Vir mense wat ver van die nodige mediese dienste af woon, kan ‘n eenvoudige siekte dikwels verreikende gevolge hê. Medisyne is soms baie duur, wat ook veroorsaak dat nie alle mense dit kan bekostig nie.

A. HOEKOM WORD ONS SIEK?

Kieme is oral in die lug rondom ons. Ons asem daagliks baie daarvan in. Ons word egter nie noodwendig van alle kieme siek nie, omdat gesonde liggame ‘n natuurlike verdedigingstelsel het wat ons daarteen beskerm. Die liggaam se immuunstelsel identifiseer enige vreemde selle en val eenvoudig die onwelkome besoekers aan en vernietig dit. Soms slaag ‘n kiem egter daarin om verby die verdediging te glip en dan word ons siek. Die liggaam se immuunstelsel gaan voort om teen die indringer te baklei en soms slaag die liggaam self daarin om gesond te word, maar ander kere het ons medisyne nodig om die liggaam te help genees. Spesifieke medisyne is gemaak om spesifieke “kieme” dood te maak. Dikwels neem ‘n pasiënt ook medisyne om die liggaam weer sterk te maak na ‘n siekte.

AKTIWITEIT

OM INLIGTING OOR MEDISYNE UIT VERSKEIE BRONNE IN TE WIN

[LU 1.1]

Gesels met jou ouers, huisdokter en/of plaaslike apteker en verskaf die naam van een soort medisyne wat gebruik kan word wanneer ‘n pasiënt die volgende simptome ervaar:

Simptome Moontlike medikasie
Erge hoofpyn
Diarree
Droë hoes
Maagkrampe
Allergiese reaksie na bysteek

Daar is verskillende soorte “kieme” wat die liggaam aanval. Onder hulle is virusse, parasiete en swamme wat die liggaam van buite af binnedring en aanval. In ander gevalle kom die indringers van binne die liggaam self, soos kankerselle.

“Kieme” wat die liggaam van buite aanval, kan die liggaam op verskeie maniere binnedring. Party virusse en swamme is in die lug en word ingeasem. Ander, soos parasiete, woon in drinkwater of word deur insekte soos muskiete, vlieë en brommers aan die mens oorgedra. Soms is daar kieme aan voorwerpe waaraan ons vat en dan lek ons dalk ons vingers af . Sekere virusse soos die MIV-virus kom die liggaam binne deur kontak met bloed van iemand wat die siekte het of wanneer jy geslagsgemeenskap het met so ‘n persoon.

B. GENEESLIKE/ONGENEESLIKE SIEKTES

Die meeste siektes waarmee ons van dag tot dag gekonfronteer word, is geneesbaar. Sommige is meer hardnekkig en neem langer om te genees as ander. Daar is egter siektes wat so sterk is dat hulle nie doodgemaak kan word nie. Ten spyte van baie navorsing en intense behandelings is party soorte kanker ongeneeslik. In sulke gevalle is behandeling en medikasie slegs daarop gemik om die pasiënt se lewensverwagting te verhoog en om die simptome te verlig.

Die MIV-virus, wat vigs veroorsaak, is nog ‘n kalant wat te slim is vir ons liggaam se verdedigingstelsel.

Assessering

LU 1

AARDRYKSKUNDIGE ONDERSOEK

Die leerder is in staat om ondersoekvaardighede te gebruik om aardrykskundige en omgewingsbegrippe en prosesse te ondersoek.

Dit is duidelik wanneer die leerder:

bronne met nuttige aardrykskundige inligting kan kies en gebruik [vind bronne];

inligting kategoriseer [werk met bronne];

1.6 moontlike oplossings vir probleme identifiseer en ondersoek [beantwoord die vraag];

1.7 deur projekte, bespreking, debat en diagramme, kennis en begrip van die vraagstuk toon [dra die antwoord oor].

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
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Source:  OpenStax, Sosiale wetenskappe: aardrykskunde graad 5. OpenStax CNX. Sep 22, 2009 Download for free at http://cnx.org/content/col10985/1.2
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