单项选择题

Which one of the following cells arises from monocytes

A.Plasma cell
B.Fibroblasts
C.Lymphocytes
D.Macrophages
E.Mast cell
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单项选择题
Which of the following statements concerning mature skeletal muscle is FALSE
A.The cells are multinucleated
B.A sarcomere is the region between two successive Z disks
C.The nuclei are centrally located
D.Myofidrils display a characteristic crossbanding pattern
E.Actin, myosin, troponin, and tropomyosin are present
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