Best Answer: In humans there are two. Glycogen, which is a long chain carbohydrate made by polymerising glucose molecules together, is stored in the liver and, in small amounts, in the muscles. It provides a fast boost of energy for short intense exercise.
A freshman is 9th grade - 14 - 15 yrs. old. A junior is in the 11th year of school./ A senior is in the 12th and final year of high school. Ages vary but a junior is 16-17 years old and a senior is 17-18 years old. Junior is 11 grade, senior is 12 grade (for high school) A junior would be around 17 and a senior around 18.
Senior and Junior. Genealogists cannot assume that persons designated Senior and Junior were father and son. In colonial times, and for most of the nineteenth century, the use of Senior and Junior did not imply any relationship at all. Whenever two persons of the same name lived in the same jurisdiction, some means was needed to differentiate them from one another.