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IEB Life Sciences: Endocrine System Summary R50,00
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  3. 12th Grade
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  5. IEB Matric (Life Sciences)

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IEB Life Sciences: Endocrine System Summary
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A summarized document of the human endocrine system based off of the Mind Action Series grade 12 life sciences textbook as well as extra notes from my class teacher. Summaries are comprehensible and easy to memorize/learn.

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  • No
  • 2
  • January 13, 2022
  • 8
  • 2021/2022
  • Summary

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11 lY 1i -..l'f • ' ~, a-. -0' * ~t 11.1 .ll; 1~ wi t n .o: 11:J-lf fu l\,.~ U...-ill (l..i flJ dll4-Jt.: l.t.: ,k 1k <k 1;:


f ND OCf2J:l}J~ '2:> ~ 'STEr'--1
.14ormones Wh~ we need 6-he s_ystem :
c, Or9an·1c chern·, ca l rnes sen-:Prs 0 E,ssenc\d\ For co-ord '1 1'0t.,on ;) _
h orn e o &tas·1s ( rno1ntotn1f"\3 a consba'1l::-
C.csens16·,ve 6o pH i chon5e6 ).
1nte,f"\al eriv ,,of'imenc ) .
• l\1aot ore p r o t eins (eoorne s6eroid'E:,J. .\e,vels th2 6\ocJ;
In
o E,. 9 51uco&e
• ~ec.re,ted b~ endocr·, ne gkJnds. bocJ~ t'.letnp - $ C0.2 I OJ. levels in
• f2e9 Ld otor~ func.,bon - 1>- Sbfl1 u\abn3 or I I ce.Jls.
inh,b,t:;·, ng.
DiF-fere.0 c e betLUeen the ner \X) U&
[Jif-~ere.o ce bet.Lue.en endoc·r rne J3 5Bs tern "$ the e,odoc.r·•re s~-s l:;em
e xoc.rine S\a0cls it
~e.r\Jous co-ord inabon Chemical co-ordino(:,ion

o Gland-o -I>- or9on<o 6-hat <Se,Cre6e.. Cl e11 l\1essa:3e. carried as o K'le..ssoge corr I ecJ as
ne.r \le ·, rn \J lse. hormo0e.
ll<oef u\ csub~bonce, f(\,essa3e corr·, e s\ ow~
o ~erve l rnpul5e -1> ~ost o


-, - -- f\1e5509e \=or a K'ieosa.3 e. qd~s F-cr
Endocr·,ne Glo re.Ls o ac.,bs 6



~ er~ ho r I:, 6"i me• a long 6i me .
., Cac.\\·,\Jor1 910 ncJs, <oweat oPit ui bar~ gland, Ac.\renal s
ca\onds "l=3 pane r eos I 9\ond, lhjro·,d -s Pancreas. e lqrge.-b& spec·, I=-- i C orea. • Rc6'5 over o \ o r ge
qreo.
.Secrete. Suh~tances ·,neo o Secrete h or n"'l()nes di rect l~
·, f'\to bhe \u\oodsbreaM. .. lon5-t;er m re:ad:~ion .
duc..t-s,.
- - - - - - - - - - ----4--- - - -- - - - -


l -r~'rel~11·
• Dud:,c::, corrq csubst;;a(')ce57 ,B\ooc:) c qrr·,les 5ubs6once.s o /\1esso9T ca r r .1ed b~
1 . &he blood-
6o lµhere bh~ re needed. to ~ ere t

, GLf-1ND5
Target; 6F-kct
krna\e o \lar·,es t=ern:a\~«; _. 6r'193ers
• Loc.o~·,o"' -ti. base o~ the brain, al;t;a d :ed co Luthe.nisin9 {\'"\o\e {:esl:es O\Ju\ul:;·,on.
bhe h~pot; hol mus. C f'\las /:;er 9\und -::) co0cro1~ "1ormcne 1'1oles -i- e,t ·, rnu Iat.~
the cells o~ L~di3 bo
warl,n5s oF ocher 9\onc:Js). produce. \:;estost;e,one .
• H~po tha \o rn us -ti- conl:.r ols HJncl::,',on·, n9 oF bhe p1tu·,tor9 ·
j C. An~e.nor lobe -::> b\ood \Je.sse.k:, 1 Post,en or lobe. =") n<:,uron5 ) . Po£tbef:,o, Lobe.
• ~ncer,or CocJenoh~poph~·,s, Pa:,be.r·,or (ne-uro~p~s-10). -
1-\orrnone larg e I:, ES Fl=ec,1::,
: J3,oter,qr lobe .=»
---, 1. ADH 12,e,nol cubules K1otes renal tu'oules
,----- - --------,..----,---------- . lC..;cJn~ 's co\le.c.6'1n3 ducts
Hormone Targeb ( ~F~ed~ collec6-i n9 ducb mere pe.r me.able bo
- - - -- - - - - - + - -

l'SH ih~ro·,cJ gland lhuro1d 9\o nd '5ecrebes \J))t,er I allow·,n9 b ~

r·
I.
J HzO ,eab&o,rt:-·,on 1"to
bh~rox·,n. bhe b\ood.
2. G H / <STH Stelebcn 0~nthe~i$ oF prc(:;ein Ox~ toc.-"in Srnoo~ rnusde Sb'imulac::es concrqc.t;\o()
I
i,

rnu1ocles I oF- l:he Liwos bre u.6e.rus k)r
oF
a. F H - J:oll ide l=-erna\e. O\lories Ova~ S t ·,muldl:;es pr·,rrcir·~ __·,\d_ b_"tr_t_h_. _____
- - - - - ~ - - - _ _ _ ; ' - - -_ _Lch
6b.,m1J\qb".9 \-1. l\lale besbes ~ollie,les ·,nto Graa~ici'"' F-oll.
le<St;es~ <Sb,mulates
ger rn·, ncil epi(;heli u/'11 6 0
proclucc sperm cells.

l\larnrnor9
'd)ond&
•

, ,-He 7:\-\'iR.OID 0LA~D EJfa;,tS oi= Bdrerohn : ,
•,~H <at;",mu\a6es t;he. th~ro',d bo
th~roxin.
produce o Increase
9e6 more
the
02.
rate. ft clepl:h or= R)reo chin'.} co
o Cou5e.5 liver bo eorwe.r6 mare <3\~c°5en l:;-o 9\uc.o=e·
- eegulates. rnebabolic ,ate• Q I.nc.rea5e'=' the. ra~e of: heol:, beo6 ~P.
- RFi:ecb?, :foL,ub-h 13 Funcbton"ir19 oF bhe Couses .-p. b\ood \Jev~el~ ·,n bhe hear b , rnusc..\es
heart. -J nervous ~bem. <t broin l:;o d ;ldte•
- Iocli ne ·,s. nec.e.ssarj For ·11:7s producbion . o 0 ·1\qces- pup·i1s
( ·, od,ne det=-:, c_',encj --:-"J <~:f::,.,b re tJEG-""'R1l\JE. FEED~AUl oF- tu& It..J 1\-\c- BL.000
more o\dos. <sec.re W -'":7 more ~o+ ,eo.'b5ar'oed
\e.ss \\.)at ~xcrel:::;ed
1 fl 1
i ~o \evd decreses t ,. ) \e \Jel' (1ees
Cortex II
/ ' - ~
sec r-et.es corb$o\
k.Jorrrol
f-)\ood
\evel \/
'II
<?>ec..retes q\dosberone ·,n the
J •- ·, n c r eosJs bxl:i 's
tiJa leJel droP5
1nc..reoses (2.)
- \\Jo regu \ol:·,on ·,n
db1\,tj 60 res.·, st le.css tJo+ re.aosorbed
bhe. blood-
G6,es5. more k.)o t excreted
Ies-s a\<los . 5e-c..re..bed - ;,
- Wat,er ba \onc..e
·l\]edulla region
·1 \tR, ·,ncr easei ·,n the
C AO~I) tJe9a6'i ve F-eed badl -f). c)
g · 6roduc,l:.·,_pn
e,creose ,n 1· ·
I end r,oduct. CO U<oes a
<2:Jecrel:;es adrenalin
J , d ecreose ·,n bhe end product

I
.:.. R\so ,~ 0
- prepare~ bhe bod~ c auses 0 ·, n c reoee ,n producbion,
For emergenc·, e,,. J
I
I r- r

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