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Neurônios são células do sistema nervoso que transmitem sinais elétricos e químicos. Eles possuem um corpo celular, dendritos e um axônio. Neurônios mielinizados têm axônios cobertos por mielina, o que acelera a transmissão dos impulsos nervosos, permitindo que o sinal "salte" entre os nódulos de Ranvier, tornando a comunicação mais rápida e eficiente. #biologia #enem #vocesabia #curiosidades #vestibular
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O processo de atividade elétrica do coração é o seguinte: 1 O nó sinoatrial, ou nó SA, localizado na câmara direita superior do coração, gera um impulso elétrico. 2 O impulso elétrico é transmitido para os átrios direito e esquerdo, fazendo com que se contraiam e impulsionem o sangue para os ventrículos. 3 O impulso elétrico chega ao nódulo atrioventricular, onde sofre um pequeno retardo. 4 A corrente elétrica flui para os ventrículos, as câmaras inferiores do coração #enfermagem #saude #medicin
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