HURRY I NEED HELP!! WILL MARK BRAINLIST

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.

Define physical activity. question 3 options: bodily movement produced by the contraction of muscles planned and structured exercise the ability to perform rigorous activity all the above

Which is a type of epithelial tissue? a. the skin on your hand b. cardiac muscle c. neurons d. cartilage