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Blababa [14]
3 years ago
14

Latrotoxin, produced by the poisonous black widow spider, increases the release of acetylcholine. how do muscle cells respond?

Biology
1 answer:
dangina [55]3 years ago
4 0

<span>Latrotoxin produced by widow spider affects muscle nerve endings. This toxin forms pores on the membrane of the cell. As a consequence, an influx of Ca+ ions occurs and bursts of the neurotransmitter acetylcholine (Ach) are released. Ach induces an increase in neuromuscular activity that leads to painful skeletal muscle spasms and later even paralysis.</span>

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<em>Aislamiento postreproductivo: Esterilidad del híbrido</em>

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El concepto biológico de <u>especie</u>, en su definición, destaca que los ejemplares de una especie no pueden entrecruzarse con ejemplares de otra especie distinta, o bien, en caso de hacerlo, no hay éxito reproductivo.

Existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. Se trata de caracteres biológicos propios de cada especie que previenen la reproducción con otras especies.

Estos mecanismos de aislamiento reproductivo pueden ser precigóticos o postcigóticos.  

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