Eje hipotalamo-hipofisiario Flashcards

1
Q

Organogenesis of axis TIME

A

-Hipofisis genesis at 4th week, start to function at 8th week. Hypothalamus is later.

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2
Q

Organogenesis of axis ORIGIN

A

-Adenohipofisis origins from cavidad bucal primitiva endoderma.
-Neurohipofisis origins form neuroectoblasto, evaginación du plancher du cerveau.

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3
Q

Neurohypophisis structure

A

Axonal projections of noyau supraoptique and noyau suprachiasmatique.
It is irrigated, so secretions are carried into the bloodstream

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4
Q

Adenohypophysis structure

A

Between the hypothalamus and hypophysis, there is an irrigated structure, where some axons project from the hypothalamus.
The irrigation goes to the cells of the adenohypophysis, and then cells react by secreting hormones into the bloodstream.

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5
Q

Homeostatic functions of the hypothalamus

A

-Regulación SNA
-Regulacion de reacciones emocionales y comportamiento (S. límbico)
-Regulación de alimentación
-Equilibrio hídrico y sed
Regulación de ritmos (nucleo supraquiasmatico)
-Regulación de función endocrina

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6
Q

Hipodisectomia
(Adenohipofisis)

A

-Función melanotropa
-Somatropa: animal prepuberto no se puede desarrollar
-Gonadotropa: el animal prepuberto no madurará sexualmente, en adulto hay repercusiones también
-Corticotropa
-Lactotropa

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7
Q

Hipodisectomia
(Neurohipofisis)

A

-Antidiurética (ADH): no pueden regular su sed y se desitratan completamente
-Oxitocina: controla la expulsión del feto y la ejección de leche

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8
Q

Insuficiencias hipofisiarias en el hombre

A

Adenomas:
-Destruir ciertas celulas secretoras por compresión o incrementar la expresión si es tumor de celulas secretoras
-Nanismo hipofisiario harmonioso
-Infantilismo genita
-Hiperprolactemia en hombres

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9
Q

Qué efectos tiene la opoterapia con hipofisis

A

-Hipertension
-Antidiureticos
-Efectos contracturantes en el utero
-La hipertension y contracción se da por hormonas diferentes

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