It's so crude that it might not even be the way neurons work. Like just a programmed activation function? Who programs it? We inherit the weights some how? Are they compressed in DNA? Doesn't seem likely because we share 90% with fruit flies etc. So not much space is left to store weights. I don't think it's the weights doing the work in biological neurons, but the architecture. Every cell might be doing the same thing but it's how you use them that counts. Maybe a biologist can comment on this.