Multiple sclerosis is caused by T cells that recognize antigens on myelin. These self-reactive T cells then attack and destroy the myelin covering on neurons in the CNS. Based on this, multiple sclerosis is an example of a:Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.aType I hypersensitivitybType II hypersensitivitycType III hypersensitivitydType IV hypersensitivity

In the pathogenesis of Multiple Sclerosis:Question 59Select one:a.All these answers are correct.b.Inflammation (mediated by macrophages and lymphocytes) leads to myelin and axon destruction.c.Regions of brain tissue are replaced with connective tissue, i.e. "scarring".d.Attempted regeneration may occur in a shadow plaque.e.Plaques develop in the brain that may increase in size over time.

Which of these statements about Multiple Sclerosis (MS) is/are correct?W. Typically, neurons within the Peripheral Nervous System (PNS) are most  affected.X.  It is classified primarily as a Type III hypersensitivity (immune complex-mediated) disease.Y.   There is typically no neuronal axon destruction at all seen in MS.Z.  Inflammation in and around the optic nerve (optic neuritis) is a common early symptom.Question 59Select one:a.if only W, X and Y are correctb.if only W and Y are correctc.if only X and Z are correctd.if only Z is correcte.if all are correct

Which one of the following statements relating to multiple sclerosis (MS) is correct?Question 30Select one:a.The pathogenesis is largely due to B-cells destroying myelin sheaths surrounding neurons.b.Decreased blood brain barrier permeability may contribute to a greater incidence of MS.c.The incidence is lowest in countries far from the equator.d.MS affects females less frequently than males.e.It is a disease that affects neurons of the brain and central nervous system.

Which of the following statement about Multiple Sclerosis (MS) is TRUE

Which finding below represents a positive Romberg Sign in a patient with multiple sclerosis? aThe patient report dark spots in the visual fields during the confrontation visual field test. bWhen the patient closes the eyes and stands with their feet together they start to lose their balance and sway back and forth. cThe patient’s sign and symptoms increase when expose to hot temperatures. dThe patient reports an electric shock feeling when the head and neck are moved downward.