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3.4 HOMEOSTASIS IN
HUMANS
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HOMEOSTASIS
The maintenance ofrelatively constant internal
environment
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KIDNES
Regulate the water & salt
balance in the body by
•excreting moreless salt•Increasing the inta!e
loss o" water
Regulate osmotic
#ressure & ionic le$els inthe blood
Excrete waste
#roducts
Regulate the blood
#H
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RE%A ARTER' ( Su##lies
oxygenated blood & nutrients
to the !idney
RE%A )EI% ( carries "iltered
blood away "rom !idney
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N E ! H
" O N S
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*lomerulus+owman,s
-a#suleRenal tubule
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#O"MATION O# U"INE
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.TRA/ITRATIO% REA+SOR0TIO% SE-RETIO%
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1ater
*lucose
Amino acids
.rea
Mineral Salts
R+-0lasma
#roteins
.ltra"iltration
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OSMO"E$U%ATION
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RE)ISIO%
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