2) The signal to contract is distributed deep into the muscle fiber by the a) Sarcolemma
b) Sarcomere
c) Transverse tubules
d) Myotubules
e) Myofibrils

c) Transverse tubules

Explanation:

The transverse tubules (T tubulars) are called these channels because they cross the filament. A network of interconnecting rings, each of which encircles a myofibril, is the transverse tubular structure. It provides an essential pathway of contact between the fiber outside and the myofibrils.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

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