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Summary IEB grade 12 Life Science: Human Endocrine System R84,00
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Summary IEB grade 12 Life Science: Human Endocrine System

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This aesthetic, engaging and in-depth digital summary of the Human Endocrine System section: of the Grade 12 IEB syllabus - is sure to help you grasp a clear understanding of the topic as well as aid you to excel in your next test or exam!

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Document information

  • June 15, 2022
  • 7
  • 2021/2022
  • Summary

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human endocrine
systems
thenervous endocrinesystemsenableanimalstoresponse
toexternalchanges tocontrolconditionsinthe
body


chemicalcoordination
slowprolongedprocessofcommunicatinginfo throughout
thebodyandhormones
avarietyofhormonesare by
secreted endocrine
glands


HORMONE
chemicalsubstances
organic targetorgan
by
secreted endocrineglands specificcensthatrespona
inbloodstreamarestreamed
carried
d
target
metabolic
regulates reactions havereceptorsitestorthat

donotlastiongastheyarebroken hormone
by enzymes



Hypothalamus

Endocrinegland partotbraincanovetnepituary

vascularauctiessalanathatsecretesnormoneswnicharecarneainthe anticantidiuretichormone
secretes

totarget
bloodstream organs
s uppliedwblood
richly vessels vascular roleofADH
osmoreceptorsinbloodresseisattnenypothalamusaetectanincreasein

theosmolarityclowmoieveissorblooatnemypothalamusreleasesaba

antinensconservewaterifbody dehydrated

EXOCRINE us ENDOCRINE regulateso smoregulationinicianeys

secretionscarried
via oversecretioniswening noretention
undersecretion dehydration
exoglands endoglands

diets ductsuses pituitaryaland
bloodstream also
knownasHypophysis
actsasachemicalcoordinatorormostoftneotherendocrinegianas

M ThemasteracanD

xxxx xxx toboggan
baseofbrainaitacneatonypo.by
astalk
endocrinecauctiess



whathormonesaresecretedby
thepituitary
gland
nyposecretion insecretionothormone

hypersecretion oversecretionofhormone hormone
2 Forcestimulatinghormone FSH
jhj.gg iuat
3 witeinzing
hormone in

5 Adrenocorticotropichormone Acth
a interstitialcellstimulatinghormone Icsh
7 arowth
H ormone arista

, hormone targetorgans function
TSH thyroid stimulatessecretionofthyroxin



FSH ovary stimulatesoogenesisleggformation
testes stimulates
s permatogenesissperm



LH ovary ovulation formationof
stimulates corpusluteum



prolactin gland
mammary stimulatesproaofminalaisorespformaternal
instinct


ACTH adrenal
gland adrenal
stimulates cortex cortisone aldosterone



ICSH testes to
testes secretetestosterone
stimulates



an bones muscles synthesise protein skeletalmuscle
growth




GrowthDisorders secretesthyroxin
caused
bytoo littlegrowthhormone
much too noainectromsalt

inprepubertailberoregrowthstops children essentialtorproductionofthyroxin
Hypersecretionleaastogiantismunichisusually
caused aoitrecandevelopitionnelevelstoolow

byatumourinthepituitarygiandiveryrare
Hyposecretionleadstounderdevelopmentorsiceleton
Thyroxinfunction
dwarfism
pituitary increasesbasalmetabollicratecitboayneatsinanbodycells
neightbetweena 122cm Promotesnormalfunctioning of
sexuallyimmature
Promotesnormal
of
functioning n ervous
system

by
treated injectionsofstacsyntheticgrowth
hormonebygen b acteria
engineered
Basalmetabolicrate
amountofenergythebodyneedstokeepfunctioningwhileatrest

inadults
oversecretionofanleaastoacromeglyconditionwnerebones DISORDERS
and
offacehands feet enlargedthickeningofsoft
are hyperthyroidism myxodermatcretin
leadtoenlargedfeaturestongue
tissues hypothyroidism autre

Thyroidaland nighmetrate
Hyperthyroidism causes
nignboaytempanasweating

neartanaresp blood increase
pressure
tremorsnervousness
muscular

swollen thyroiagianacexophthalmicgoitre

normalblood
testcanten
youabout
your Hypothyroidismcauses
alow rate
metabolic
thyroid
a Adultimyxodermaimentalsluggishnesscower
slow trespiratenowboaytemp I
childrencretinism.no sexual
growthimmature
development retarded
mentally

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