Sometimes you may have atrial flutter that develops into atrial fibrillation and vice versa. The risk factors for and the symptoms and causes of atrial flutter are similar to those of atrial fibrillation. For example, strokes are also a concern in someone with atrial flutter. As with atrial fibrillation, atrial flutter is usually not life-threatening when it's properly treated.
Nerves and Nerve Types. There three types of nerves in the central nervous system: motor neurons, sensory neurons and autonomic neurons. Motor nerves send impulses or signals from the brain and spinal cord to all of the muscles in the body.
  A different set of genes are active in muscle cells which allow it to perform particular functions. A different set of genes are active in nerve cells which allow the nerve cell to perform a different set of specialized functions.uscle cells differ from nerve cells mainly because? already exists. already exists as an alternate of this question. exists and is an alternate of. When you're not busy performing, what do you like to do for fun? Mature human nerve cells and muscle cells? What type of nerve cell stimulates muscle cells to contract? How are bone cells and nerve ...