Download - Medio Interno
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MCGPHOMEORRESIS
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Webgrafía: http://www.fisiologiafacena.ecaths.com/bibliografia/
Silverthorn, D.: Fisiología Humana. Un Enfoque Integrado; 6ªEdición. Editorial Médica Panamericana. México. 2014
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MCGP
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Mujeres 1/2
Hombres 2/3Recién nacidos 3/4
MCGP
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Espacios Potenciales
LCR
Líquido del Oído Interno
Líquido Intraocular
Líquido Sinovial
Linfa
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Silverthorn – 6° Ed Ed. Médica Panamericana
MCGP
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“Mar interior”: Líquido que rodea a las células en un organismo
Cl- Na+ Mg++ SO42- Ca++ K+ HCO3
-
Na+ Cl- HCO3- K+ Ca++ Mg++ SO4
2-
Agua de mar
LEC
DOC
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CARACTERÍSTICAS DEL MEDIO INTERNO
MANTIENE
CONSTANTE
ElectrolitosBiomoléculasGases
Composición Química
Propiedades Físicas
OsmolalidadNeutralidad EléctricapHTemperatura
FIJEZA DINÁMICA
• Proporciona condiciones fisicoquímicas favorables
• Permite el intercambio de información entre los órganos
• Proporciona al organismo relativa independencia frentea las variaciones del medio externo.
DOC
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CAMBIOS ONTOGÉNICOS DE LOS LÍQUIDOS CORPORALES
Fisiología Comparada del Medio Interno – José Antonio Coppo
12 litros
24 litros
36 litros
40 litros
25 litros
15 litros
DOC
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DOCTambién habla de un estado
Marca una tendencia
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MCGP
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Silverthorn – 6° Ed Ed. Médica Panamericana
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Silverthorn – 6° Ed Ed. Médica Panamericana
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Silverthorn – 6° Ed Ed. Médica Panamericana
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Silverthorn – 6° Ed Ed. Médica Panamericana
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Silverthorn – 6° Ed Ed. Médica Panamericana
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RETROALIMENTACIÓN POSITIVA
RETROALIMENTACIÓN NEGATIVA
Silverthorn – 6° Ed Ed. Médica Panamericana
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IMPORTANCIA DE LA MEMBRANA!!!!
AguaElectrolitosCompartimientosMembrana
Silverthorn – 6° Ed Ed. Médica Panamericana
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DOC
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DOC
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COMPOSICIÓN DE LOS LÍQUIDOS ORGÁNICOS LEC Y LIC
SUSTANCIAS LIC LECSulfatos 1.0 mosm/l 0.5 mosm/lAminoácidos 8.0 mosm/l 2.0 mosm/lCreatinina 9.0 mosm/l 0.2 mosm/lUrea 4.1 mosm/l 4.0 mosm/lLactato 1.5 mosm/l 1.2 mosm/l
Glucosa 0.2 mg/dl 90.0 mg/dlLípidos (Tri-Col-FosLip) 2.0 – 59.0 g/dl 0.5 mg/dlAminoácidos 200.0 mg/dl 30.0 mg/dl
pH 7.0 7.4pO2 20 mmHg 35 mmHgpCO2 50 mmHg 46.0 mmHg
Fisiología Comparada del Medio Interno – José Antonio Coppo
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OSMOLALIDAD Y TONICIDAD DEL MEDIO INTERNO
Na+ y A- (Cl- y HCO3-) Glu (5) – URE (5) – PROT (10)
270 mosm/L 20 mosm/L
POsm= 2 [Na+] + GLU (mmol/l) / 18 + BUN (mmol/l) / 2.8
POsm= 2 [Na+] mEq/l + Glucemia (mg/dl) 0.055 + BUN (mg/dl) 0.36
290 mosm/L
Plasma ↔ LEC ↔ LIC DOC
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Silverthorn – 6° Ed Ed. Médica Panamericana
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DOC
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DOC
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DOC
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DOC
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DOC
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DOC
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DOC
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JAC
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