The etiology of multiple sclerosis may involve
a. lack of an enzyme needed for myelinization.
b. damage to the blood-brain barrier by a virus.
c. the formation of -amyloid protein.
d. degeneration of cholinergic cells in the basal forebrain.
e. the formation of neurofibrillary tangles.
Question 2
An autoimmune reaction that damages ________ is the cause of the multiple sclerosis.
a. the myelin sheaths surrounding nerve cells
b. presynaptic muscarinic receptors
c. acetylcholinergic neurons
d. GABAergic neurons
e. sclerotic plaques