# Model Mathematics

### Component: GH

$ddtime GH = kr1 ⁢ GHRH + ghr_GHRH t1 n1 GHRH + ghr_GHRH t1 n1 + 1.0 + g0 ⁢ GHS tg0 ng0 1.0 + GHS tg0 ng0 + 1.0 + F1_GHS 1.0 + SRIF_PeV t2 n2 + F1_GHS - k1 ⁢ GH$

### Component: SRIF_PeV

$ddtime SRIF_PeV =- k4 ⁢ SRIF_PeV + kr4 ⁢ GH t5 n5 GH t5 n5 + 1.0 + S_basal$

### Component: SRIF_ArC

$ddtime SRIF_ArC = kr2 ⁢ GHRH + ghr_GHRH t3 n3 1.0 + GHRH + ghr_GHRH t3 n3 - k2 ⁢ SRIF_ArC$

### Component: GHRH

$ddtime GHRH = kr3 ⁢ 1.0 + F2_GHS 1.0 + SRIF_PeV + SRIF_ArC t4 n4 + F2_GHS + ghr_GHRH ⁢ 1.0 - k3 ⁢ GHRH$

### Component: F

$F1_GHS = g1 ⁢ GHS tg1 ng1 1.0 + GHS tg1 ng1 F2_GHS = g2 ⁢ GHS tg2 ng2 1.0 + GHS tg2 ng2$

### Component: ghr_GHRH

$ddtime ghr_GHRH = inject - kghr ⁢ ghr_GHRH dghr_GHRH_dt = inject - kghr ⁢ ghr_GHRH inject = 0.0 if time < onset C if time ≥ onset ∧ time ≦ onset + duration 0.0 if time > onset + duration$
Source
Derived from workspace Farhy, Bowers, Veldhuis, 2007 at changeset 1aa30279b2f9.
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