For teenagers and young adults, symptoms of fatigue, fever and loss of appetite occur for roughly two to three weeks after the mononucleosis incubation period.In these cases, symptoms force infected individuals to refrain from school or work for a period of time.or teenagers and young adults, symptoms of fatigue, fever and loss of appetite occur for roughly two to three weeks after the mononucleosis incubation period.
Hair is simple in structure, but has important functions in social functioning. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin.The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft.air is simple in structure, but has important functions in social functioning. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin.
Actin and Myosin make up muscle cells and are mainly made up of the  macromolecule protein. Proteins are the most diverse and complex  molecules that exist in living organis â¦ ms. The muscles contract to make your hair stand up when you are could.  This makes the hair layer â¦ thicker and thus traps more air and keeps  you warm.   The muscles contract to make you hair stand up when you are  frightened.