Friday, November 12, 2010


7 有關骨骼肌之敘述,下列何者錯誤?
收縮力的產生是來自於肌動蛋白(actin)與肌凝蛋白(myosin)的相互作用
鈣離子與troponin-C的結合促使肌動蛋白絲(actin filament)上的troponin-I移動,進而促使肌凝蛋白的結合部位暴露出來
H-band位於肌肉的肌節(sarcomere)的中央
在Z-line的兩側的I-band主要是由肌動蛋白所組成的

ZIMHA ZIMHA ZIMHA ACTIN MYOSIN

answer is B:

it is not the troponin I: it is the tropomyosin

the right way is : ca bind to troponin C and release the tropomyosin binding site and expose the binding sites for myosin to actin, cause sliding!!

READ carefully




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