It is called the neuromuscular junction.
the axon terminal coming into close proximity to a muscle fiber
the close arrangement of two elements to enhance descriptions.
Some words with the prefix "juxta" include juxtapose, juxtaposition, and juxtaglomerular.
These structures are called terminal cisternae, and they function to store and release calcium ions during muscle contraction. The close proximity of terminal cisternae to transverse tubules allows for efficient communication and regulation of calcium release during excitation-contraction coupling in muscle cells.
Juxtaposition and unclear directions are introduced when selection keys are too close to each other on the screen. Unintended consequences happen from selecting the wrong key.
there are several hotels within a stone's throw to the terminal
A juxtaposition is placing two opposing things close together to emphasize their differences. An example of juxtaposition is the opening lines of "A Tale of Two Cities" by Charles Dickens: "it was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness".
The parotid gland is close to the masseter muscle, which is one of the main muscles responsible for chewing.
sphincter
masseter
The adductor Muscle