Retrieving "Action Potentials" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Human Brain

   Linked via "Action potentials"

   Neurophysiology and Communication
   Neuronal communication relies on electrochemical signaling. Action potentials propagate down axons, leading to the release of neurotransmitters across the synaptic cleft, thereby influencing the post-synaptic neuron.
   The Role of Neurotransmitters

2. Peristalsis

   Linked via "action potentials"

   Peristalsis operates via the sequential contraction of smooth muscle layers. The muscularis externa of the gastrointestinal tract consists of two principal layers: the inner circular layer and the outer longitudinal layer. Contraction of the circular muscles behind the bolus effectively narrows the lumen, while simultaneous relaxation of the muscles ahead of the bolus widens the lumen, creating a pressure gradient that d…