An individual nerve cell is known as a

___________, a disease characterized by severe muscle weakness and fatigue, is caused by a blockage of acetylcholine at the neuromuscular junction

a. Alzheimer's disease b. Parkinson's disease c. Muscular dystrophy d. Myasthenia gravis

Answer the following statement(s) true (T) or false (F)

Those of non-European ethnicity and culture are in the majority for the youngest age group in the U.S.