Growth Hormone
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.com · pituitary · GH pulses · IGF-1 · feedback
GH pulse
low
phase
awake
IGF-1
baseline
state
—
Hypothalamus (GHRH / somatostatin)
Pituitary somatotrophs
GH pulse → IGF-1 (liver)
Bone & muscle growth
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.com · Growth Hormone Axis