The Most Numerous of the Cytoskeleton Fibers Are the

question 32

Multiple Choice

The most numerous of the cytoskeleton fibers are the

• A) microtubles.
• B) microfilaments.
• C) dendritic spines.
• D) neurofilaments.

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Definitions:

Muscle Unit

Refers to a motor unit, the smallest functional element of a muscle, consisting of a motor neuron and the skeletal muscle fibers it innervates.

Sarcomere Contraction

The process of muscle fibers shortening, caused by the sliding of actin and myosin filaments within the sarcomere, the fundamental unit of muscle contraction.

Myosin

ATP-dependent motor protein; makes up the thick filaments in a sarcomere.

Actin

A globular protein that forms filaments, which are vital components of the cytoskeleton in all eukaryotic cells, involved in cell movement and structure.