Name the contractile proteins found in skeletal muscle. A 46-year old woman presented with trouble swallowing and walking upstairs. On examination she had tongue atrophy, as well as fasciculations of her tongue and thigh muscles. Degeneration of which part of the nervous system can produce these symptoms? ALS a. Dopamine producing neurons substantia nigra compacta b. Schwann cells in PNS c. Motor neurons of the brain, cranial nerve nuclei, and spinal cord d. Neuromuscular junction e. Oligodendrocytes in the lateral spinal cord and frontal lobe I

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