Which Is TRUE About the Muscle Fibers Found in a Muscle

question 32

Multiple Choice

Which is TRUE about the muscle fibers found in a muscle spindle?

• A)They are not true muscle fibers because they cannot contract.
• B)They are innervated by alpha motor neurons.
• C)They function to maintain tension on spindle receptors.
• D)When stimulated to fire,they always inhibit flexor muscles.
• E)Their contraction is stimulated by alpha motor neurons and inhibited by gamma motor neurons.

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Definitions:

Signal Transduction

A process in which a cell converts and amplifies an extracellular signal into an intracellular signal that affects some function in the cell. Also see cell signaling.

ATP

Abbreviation for adenosine triphosphate, a molecule that stores and transmits chemical energy within cells, vital for many cellular processes.

Plasmodesmata

Microscopic channels that traverse the cell walls of plant cells and some algal cells, facilitating intercellular communication and transport.

Desmotubule

A central rod-like structure of desmosomes, which are special cell-cell adhesion structures, facilitating cellular communication and cohesion in multicellular organisms.