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Biology, 01.09.2020 19:01 mookdag

Un niño que ha enfermado de paperas o varicela, no desarrollará estas enfermedades en una segunda oportunidad, porque:

I. la piel, mucosas y lágrimas impiden el ingreso de los microbios.

II. en el primer contacto adquirió anticuerpos.

III. interviene la inmunidad Adaptativa, la cual presenta “memoria”.

IV. su sistema defensivo está preparado frente a una segunda exposición

a. I y II son correctas

b. III y IV son correctas

c. II, III y IV son correctas

d. I, II y III son correctas.

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Un niño que ha enfermado de paperas o varicela, no desarrollará estas enfermedades en una segunda o...
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