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BY :SITI QOMARIYAH (H1E011011)SITI AMINAH (H1E011028)TINA SEPTIKASARI (H1E011031)
TRANSPORT PHENOMENON
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OUTLINE
STRUKTUR SEL
TRANSPORT MEMBRAN
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STRUKTUR SEL
APA ITU SEL ??
Sel adalah unit terkecil dari makhluk hidup yang membentuk struktur dan fungsi tertentu.
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o STRUKTUR UMUM SEL
SEL
BAGIAN LUAR SEL
(MEMBRAN DAN DINDING SEL)
SITOPLASMA
NUKLEUS/ INTI SEL
BAGIAN DALAM SEL
(SITOPLASMA DAN ORGANEL)
ORGANEL LAIN
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BAGIAN- BAGIAN SEL
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BAGIAN- BAGIAN SEL
OUTLINE
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TRANSPOR PASIF(Transpor tanpa menggunakan energi)
TRANSPOR AKTIF(Transpor dengan menggunakan energi) karena dari konsentrasi rendah tinggi
TRANSPORT PADA MEMBRAN
DIFUSI OSMOSIS
Sederhana
TerfasilitasiDibantu dengan
protein pembawa di membran
palsma sehingga membentuk kanal
dan molekul bergerak melintasi
membran
Difusi molekul air melintasi membran permeabel
Endositosis Eksositosis
“memakan”(fagositosis)
“memuntahkan”
“meminum”(pinositosis)
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20
07
-20
08
Pertukaran / pergerakan zat
baik masuk maupun keluar
berlangsung melalui
membran sel..
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Extracellular fluid
Cholesterol
Cytoplasm
Glycolipid
Transmembraneproteins
Filaments ofcytoskeleton
Peripheralprotein
Glycoprotein
Phospholipids
BAGIAN – BAGIAN MEMBRAN SEL :
Fluid Mosaic Model
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Difusi Sederhana Mekanisme Difusi Sederhana :
DIFUSI: proses pergerakan molekul dari
konsentrasi tinggi rendah
DIFUSI: proses pergerakan molekul dari
konsentrasi tinggi rendah
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o DIFUSI TERFASILITASI (TERBANTU)
Difusi melalui saluran protein channels move specific molecules across cell
membrane Tidak memerlukan energi Memerlukan carrier protein
open channel = fast transport
facilitated = with help
tinggi
rendah
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Fick’s I lawdx
dcDA
dt
dn
Number of atoms crossing area A
per unit time
Cross-sectional area
Concentration gradient
Matter transport is down the concentration gradient
Diffusion coefficient/ diffusivity
AFlow direction
As a first approximation assume D f(t)
HUKUM FICK’S PROSES DIFUSI DAPAT DIJELASKAN DENGAN HUKUM FICK:
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dx
dcDA
dt
dn
gradientionconcentrattimeareaatomsJ //
dx
dcJ
dx
dcDJ
dx
dcD
dt
dn
AJ
1
Fick’s first law
Aliran (J) : Sejumlah n atom yang mengalir melalui satuan penampang melintang (A) dalam waktu (t)
Aliran (J) → sebanding dengan perbedaan konsentrasi (dc/dx)
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Fick’s II law
Jx Jx+x
x
xxx JJonAccumulati
xx
JJJonAccumulati xx
xx
JJJx
t
cxx
Jsm
Atomsm
sm
Atoms
23.
1
xx
Jx
t
c
x
cD
xt
cFick’s first law
x
cD
xt
c D f(x)2
2
x
cD
t
c
Perubahan konsentrasi terhadap waktu dalam daerah tertentu sebanding dengan perubahan perbedaan konsentrasi pada titik itu dalam sistem tersebut.
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OSMOSIS→Osmosis is the
movement of WATER across a semi-permeable membrane
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At first the concentration of solute is very high on the left.
But over time, the water moves across the semi-permeable membrane and dilutes the particles.
MEKANISME PERISTIWA OSMOSIS :
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SEKIAN &
TERIMA KASIH