A Motor Unit Consists of a Skeletal Muscle Fiber (Cell)

question 46

True/False

A motor unit consists of a skeletal muscle fiber (cell) and all of the motor neurons that innervate that skeletal muscle fiber.

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Definitions:

Biological Membrane

A lipid bilayer structure that encloses the cellular contents of living cells and regulates the passage of substances in and out of cells.

Trans Membrane

Pertaining to or spanning across a cellular membrane, often referring to proteins that extend through the bilayer and interact with both the inside and outside of a cell.

Fluid Mosaic Model

The currently accepted model of the plasma membrane and other cell membranes, in which protein molecules “float” in a fluid phospholipid bilayer.

Lipid Bilayer

The lipid bilayer is a fundamental structure forming cell membranes, composed of two layers of phospholipids, which serves as a barrier to protect cellular contents.