Sistema endocrino
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Transcript of Sistema endocrino
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SISTEMA ENDOCRINO
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Exocrinas: Hígado Páncreas glándulas salivales
(que se sitúan en la boca),
glándulas lagrimales (que están en los ojos),
glándulas sudoríferas y sebáceas (ubicadas en la piel),
glándulas mamarias Gónadas: (son los
ovarios y testículos.
Endocrinas Hígado Páncreas hipotálamo, glándula pineal (además
llamada epífisis), glándula pituitaria (o
también denominada hipófisis)
glándulas paratiroides y tiroides
timo, glándulas suprarrenales
(o también llamadas adrenales)
Gónadas
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Química de las hormonas
Esteroides: derivadas del colesterol: Glándula suprarenal (glucocorticoides, mineralcorticoides y andrógenos), Ovario (estrógenos y progesterona) y Testículo (testosterona).
Amina y Aminoácidos: Adrenalina y Noradrenalina , T3-T4, Melatonina.
Derivados de Ácidos Grasos: (polinsaturados) Prostaglandinas, Tromboxanos y Leucotrienos.
Péptidos: Factores reguladores del hipotálamo, ADH y Oxitocina , ACTH, MSH, Glucagón, Gastrina, Secretina, Calcitonina.
Proteínas: Insulina, Parathormona, STH, Prolactina, FSH, LH, TSH.
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Hormonas
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Glándulas endocrinas
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Hipofisis
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Silla turca
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Hormonas Hipofisis anterior
(adenohipofisis): *SH; GH:
somatotrofina (crecimiento)
*TSH: tirotropina ( estimulante de la tiroides)
*PRL: prolactina *ACTH:
adrenocorticotrofica *Gonadotrofinas: FSH,
foliculoestimulante; LH, luteinizante
Hipofisis posterior(neurohipofisis):
no produce hormonas, solo las almacena:
*ADH antiduretica, vasopresina
*Oxitocina
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Hipotálamo-hipófisis
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Somatotrofina
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Acromegalia
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Tirotropina
Estimula el crecimiento de la tiroides, y la sintesis de sus hormonas T3 T4
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Prolactina PRL
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Prolactina
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Adrenocorticotropina
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Cortisol
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Aldosterona
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addison
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Cushing
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Tiroides
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Células de la glándula tiroides
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Formación de T3 y T4
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Funciones de las hormonas tiroideas:
Mielinizacion de las neuronas
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HIPOTIROIDISMO EN LA INFANCIA
Cretinismo: Disminución de
hormonas tiroideas desde la etapa fetal.
Retardo en el desarrollo del SNC.
“Cara de luna llena”
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Exoftalmos: ojos hacia adelante
Bocio: aumento del tamaño de la tiroides
Piel caliente Taquicardia Disminución de
peso
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Páncreas
1. cabeza 2. cuello 3. cuerpo 4. cola
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Tejidos del páncreas
Páncreas exocrino
Acinos pancreáticos:
Jugo pancreático (digestion)
*Lipasa pancreática *Amilasa pancreatica *Bicarbonato *Tripsinógeno *Carboxipolipeptidasa
Páncreas endocrino
Islotes de Langerhans:
Hormonas: Celulas alfa: GLUCAGON Celulas beta: INSULINA Celulas delta: GASTRINA,
SOMATOSTATINA
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Acción de la Insulina
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Acción de la Insulina
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Diabetes Mellitus tipo IInsulinodependiente o Juvenil
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Diabetes Mellitus tipo IINo Insulinodependiente o del adulto
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Glándula Paratiroides
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PTHParathormona
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Parathormona
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Timo
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Gracias