Endocrin Flashcards

1
Q
  1. Axa Epitalamo-Pineala
A

Se pare ca nu e afectatat

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2
Q

2.Axa Hipotalamo-retrohipofizara

A

Nu este afectata de senescenta, chiar trebyie subliniata remarcabila rez a neuronilor magnocelulari(adh) hipotalamivi fata de proc de degenerare

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3
Q
  1. Axa hipotalamo-adenohipifizo-glandulara
A

-depopulare neuronala
-proliferare gliala
-modif praguri de excitatie

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4
Q

3.1 hipotalamo-hipofizar de crestere

A
  • nivel scazut de GH (50%)si IGF1
    =SOMATOPAUZA
    => scade sinteza proteica, masa osoasa, imunitatea, masa uscata
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5
Q

3.2 Hipotalamo hipofizo tiroidian

A

-scadere usoara a tsh
-scadere a secretiei tiroidiene
-clearence scazut de T4
-conversie redusa t4 in t3
=> t4 normal, t3 scazut

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6
Q

3.3 Hipotalamo hipofizo suprarenalian

A

Exista schimbari variabile legate de varsta in efectele acth asupra secretiei de cortizol, a cort asupra acth, fara niciun deficit pe productia suprarenaliana!!!

Apar modificari in:
- ritmicitatea secretiei:
Limita inf a secretiei vesperale e mai inalta si mai precoce
Cu consec asupra tulb de somn la batrani, si riscul de fractura, si crestere cant de tes adipos

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7
Q

3.4 hipotalamo hipfizo gonadic

A

-menopauza la femeie cu:
deficit esteogenic,cresterea conc de gonadotropi=» noradrenalina cerebrala, colesterolul total( prin ldl), pierdere osoasa, simptome vasomotorii

-andropauza
pierderea masei musculare si osoase, crestere de adipos, insulinorez, creste riscul cv, scaderea libidou, fatigabilitate, anemie

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8
Q

Homeostazia calciului

A
  • scaderea nr rec vit D la nivel intestinal cu scaderea absorbtiei de calciu
  • atrofia mucoasei intestinale cu scaderea abs de ca
    -hipovitaminoza D data de aport alim scazut, abs int scazuta, expuner ela soare scazuta, activare renala scazuta
    -cresterea PTH( ca urmare a scd ca, vit d) => hiperparatiroidism sec cu pierdere de masa ossoasa!!!
    => diminuare parametri musculari, densitate osoasa cu cresterea fracturilor
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9
Q

Glucoza/Diabet zaharat

A
  • 95 %tip 2
    Intoleranta la glucoza data de
  • insulinorez data de obezitate
    -deficit de captare musc a gluc
    -scaderea secr de insulina
    -hiperprod hepatica de gluc
    -scaderea acriv fizice
    -cresterea activ sns
    -medicamente diabetogene
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