Membranous channel extending inward from muscle fiber membrane.

Membranous channel extending inward from muscle fiber membrane , is the transverse tubules.

Explanation:

Transverse tubules -

Transverse tubules also called the T - tubules , are basically the extensions of the cell membrane that penetrates into the center of the skeletal and the cardiac muscle cells .

T - Tubules are made up of phospholipid bilayer .

T - Tubules are directly connected to the sarcolemma at one of the end , forming a network of the tubules running parallel and perpendicular to the sarcolemma.

answer:

the mother

explanation:

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explanation:

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