
Cuestionario sobre Distrofia Muscular
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Science
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University
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52 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
La elevación de creatina fosfoquinasa (CK) en la distrofia muscular de Duchenne refleja:
Daño muscular y fuga de enzimas
Alteración en hígado
Hiperactividad de glucólisis
Acumulación de lactato
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
El metabolismo energético en músculo con DMD es ineficiente porque:
No entra glucosa a la célula
Se produce ruptura del sarcolema y pérdida de enzimas
El glucógeno no se degrada
Se bloquea la β-oxidación
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
La distrofina está relacionada con la estabilidad de la membrana. Su ausencia provoca:
Alteración en el ciclo de Krebs
Necrosis celular
Aumento de síntesis de glucógeno
Estimulación de ribosomas
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
El aumento de calcio intracelular en fibras musculares con DMD activa principalmente:
Calpaínas (proteasas dependientes de Ca²⁺)
Glucógeno sintasa
Amilasa
Piruvato deshidrogenasa
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Una consecuencia bioquímica de la necrosis muscular es:
Elevación sérica de CK y LDH
Disminución de glucosa sanguínea
Aumento de colesterol plasmático
Reducción de urea
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
La principal fuente de energía en fibras musculares de contracción rápida es:
Fosfocreatina
Colágeno
Aminoácidos libres
Ácido láctico
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
En un paciente con DMD, el exceso de radicales libres proviene principalmente de:
Alteraciones mitocondriales
Disminución de glucosa plasmática
Sobreactividad de lipasas
Activación de ribosomas
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