GENERAL HISTOLOGY

Detailed explanation-1: -The neuromuscular junction is essentially comprised of two different types of cells: skeletal muscle cells and a type of nerve cell called motor neurons. Motor neurons are covered with ion channels, which open in response to electrical signals from the brain.

Detailed explanation-2: -Multiunit smooth muscle cells do not possess gap junctions, and contraction does not spread from one cell to the next.

Detailed explanation-3: -Gap junctions and hemichannels in normal skeletal muscles Undifferentiated myoblasts express Cx43 and Cx45, proteins that form gap junction channels involved in coordinating the differentiation response induced by extracellular ATP [76].