Pequeñas cavidades quísticas
Pars
intermedia Células parenquimatosas que rodean folículos llenos de coloide
No es muy clara su función
Poseen receptores para melatonina
Pars
tuberalis Vénulas portales
Pituicitos
Oxitocina
Fibras amielínicas, provienen de las neuronas neurosecretoras cuyo cuerpo están en los
ADH
núcleos supraóptico y paraventricular del hipotálamo 3
Pars Los axones terminan en capilares fenestrados y tienen vesículas de secreción de 3 tipos:
Neurohipófisis
nerviosa - Vesículas de neurosecreción 10-30 nm (dilataciones=cuerpos de Herring)
- Vesículas 30 nm con acetilcolina
- Vesículas 50-80 nm
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