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.
Best Answer: In a normal four-year American High School: Freshman (pl Freshmen, sometimes also frosh or freshies) - 9th grade. Sophomore (Soph)- 10th grade. Junior - 11th Grade. Senior - 12 Grade. Juniors and Seniors together are called upperclassmen. Since colleges and universities in America are normally four years as well, first through fourth year undergraduates are also often called freshmen, sophomores, juniors, seniors.