The muscle fiber fires an action potential. on the T-tubule sense the voltage change and mechanically open ryanodine receptors (RyRs) on the sarcoplasmic reticulum. Calcium floods the cytosol.
A volley of signals races up through the of the thalamus. And then — you feel it. A massive excitatory postsynaptic potential (EPSP) arrives at your basal dendrites. brain bee study guide
At the NMJ, the enzyme — sitting on the basal lamina — rapidly cleaves ACh into acetate and choline. Choline is taken back up into the LMN via the choline transporter (CHT1) , then reused. The muscle fiber fires an action potential