Melody has been experiencing severe mood swings, having a lot of manic energy for a period and then experiencing an extremely depressed state. her symptoms are characteristic of

In multiple sclerosis, the immune system destroys the substance that coats and protects nerve fibers in the brain and spinal cord. this causes inflammation and injury to the nerves, and the axons don't conduct impulses as well.

Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage

List things you can lose your license for if you are under 21