HISTOLOGIA SISTEMA ENDOCRINO
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Transcript of HISTOLOGIA SISTEMA ENDOCRINO
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SISTEMA ENDOCRINO
Dra. Karen Itzel Illescas CruzMedico cirujano FacMed Unam
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(hipófisis)
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Glándula endocrina compuesta en la base del cerebro (silla turca) El infundibulo y una red vascular conectan con el hipotálamo
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Basófilos 10% acidofilas 40% cromófobas 50%
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50% / vesiculas eosinofilicas
GHRH +++
Ghrelina*(-)
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Generalidades•Glándula endocrina•Se encuentra ubicada parte anterior del cuello
Estructura AnatómicaConsta de dos lóbulos
Estructura HistológicaFolículo tiroideoEpitelio cúbico simple. Tipos de células :- Foliculares (T3 y T4) - Parafoliculares (calcitonina)Coloide tiroideo
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EL PRINCIPAL COMPONENTE DEL COLOIDE ES LA: TIROGLOBULINA!
(ES LA FORMA INACTIVA DE LAS HORMONAS TIROIDEAS)
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PEROXIDASA TIROIDEA (TPO)
TSH
TSHR
Simportador de I- Na (NIS)
PENDRINA TRANSPORTA YODURO HACIA EL COLOIDE
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Regulación
Hipófisis
TSH
Tiroides
T3 y T4
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Hormona Órgano Diana
Acción
Tiroxina (T4) Todos los órganos
- Estimulación del metabolismo celular- Favorece el crecimiento- Desarrollo del sistema nervioso
Triyodotironina(T3)
Todos los órganos
Calcitonina Tejido óseo Niveles de calcio en sangre
ACCIONES DE LAS HORMONAS PRODUCIDASACCIONES DE LAS HORMONAS PRODUCIDAS EN LAS TIROIDESEN LAS TIROIDES
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Paratiroides
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Conglomerados y grasa unilocular
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Mecanismo de regulación del calcio en sangre
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Generalidades Glándula endocrina Polo superior de cada riñón
Estructura Histológica Dos zonas (corteza y médula). Corteza:-Zona Glomerular
(Mineralcorticoide) - Zona Fascicular (Glucocorticoide) - Zona Reticular (Andrógeno,
estrógeno) Médula (Adrenalina y noradrenalina) Regulación:
. Mineralcorticoide: - Aldosterona: Controla volumen de liquido
corporal. Glucocorticoides: (efectos antiinflamatorios)- Cortisol. Hormonas Sexuales.
Adrenalina y noradrenalina
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Zona glomerular
Zona fascicular
Zona reticular
Medula
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Flechas: capa reticular
Capa fascicular: espongiocitos
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Marcadores neuroendocrinos
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GeneralidadesEstructura AnatómicaEstructura HistológicaRegulación
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ISLOTES PANCREATICOS O DE LANGERHANS
Capilares
Células alfa(Glucagón)
Células beta(Insulina)
Células delta
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Arreglo en conglomerados y cordonal
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Mecanismo de regulación de la glucosa en
sangre
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