At age 4, james underwent a biopsy of the right gastrocnemius muscle. the pathologist's report noted histopathologic changes suggestive of duchenne muscular dystrophy. describe the typical microscopic changes noted in the muscle tissue of someone with duchenne's muscular dystrophy.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.