Military forces have worn distinctive uniform items for centuries to create a psychological advantage and boost their esprit de corps, but the military use of berets is a relatively recent phenomenon. In the 16th and 17th centuries, the Blue Bonnet became a de facto symbol of Scottish Jacobite forces.
Muscle cells have adapted to their job by contracting and relaxing.  When calcium levels are increased the muscle cells contract. On the  other hand, when calcium levels droâ¦p the muscle cells get relaxed.
A muscle cell is specialized to contract and relax in unison with other muscle cells in a muscle tissue when you want to move a certain muscle(controlled by your cerebrum).I hope this answers your question! Ciao!aking the world better, one answer at a time. A muscle cell is specialized to contract and relax in unison with other muscle cells in a muscle tissue when you want to move a certain muscle(controlled by your cerebrum). I hope this answers your question! Ciao!