<prompt> The characteristic features of Myophosphorylase deficiency includeMcArdles diseaseStorage of glycogen in skeletal musclesMuscle weakness and failure of exercise induced rise in blood lactateAll of the above  <response>: D All of the above McArdle syndrome type V: Enzyme Deficiency: Muscle phosphorylase Morphologic changes: Skeletal muscle only-accumulations of glycogen predominant in subsacrolemmal location. Clinical features: Painful cramps associated with strenuous exercise. Myoglobinuria occurs in 50 of cases. Onset in adulthood 20 year old. Muscular exercise fails to raise lactate level in venous blood. Compatible with normal longevity. 