lon-channel linked receptors in neurotransmission RESTING NEUROMUSCULAR JUNCTION ACTIVATED NEUROMUSCULAR JUNCTION nerve VOLTAGE-GATED nerve terminal impulse Ca CHANNEL acetylcholine ACETYLCHOLINE GATED CATION CHANNEL VOLTAGE-GATED Ca CHANNEL OLTAGE-GATED la CHANNEL GATED Ca2 sarcoplasmic muscle RELEASE CHANNEL reticulum plasma membrane 神经肌肉接点由Ach门控通道开放而出现终板电位时，可使肌细胞膜中的电位 门Na+通道和K+通道相继激活，出现动作电位；引起肌质网Ca2+通道打开， Ca2+进入细胞质，引发肌肉收缩。 8 ThIon-channel linked receptors in neurotransmission 神经肌肉接点由Ach门控通道开放而出现终板电位时，可使肌细胞膜中的电位 门Na+通道和K+通道相继激活，出现动作电位；引起肌质网 Ca2+通道打开， Ca2+进入细胞质，引发肌肉收缩