ENDOPLASMIC RETICULUM

OXIDATION OF STEROID NUCLEUS 
 BY SPECIFIC P-450 HYDROXYLASES

ALDOSTERONE
ANDROGEN
 PRECURSORS
SYNTHESIS AND �SECRETION� OF STEROID HORMONES BY ADRENAL CORTEX
GONADS
Cholesterol in
Intracellular
Lipid droplets
2
1
3
KIDNEY
DIFFUSION OF STEROIDS
 OUT OF CELL
CORTISOL
CHOLESTEROL IS TAKEN UP INTO  MITOCHONDRIA EITHER DIRECTLY FROM  PLASMA LDL/HDL OR FROM INTRACELLULAR CHOLESTEROL ESTERS �STORED�  IN LIPID DROPLETS
UPTAKE OF CHOLESTEROL
ESTER FROM LDL AND HDL
IN PLASMA
StAR facilitates transfer of
cholesterol molecules between inner and outer membranes
4
17-OH PROGESTERONE
REMOVAL OF
SIDE CHAIN
P450c11
11-HYDROXYLASE