The Simplest Units of All Matter Are ________, and Many

question 143

Short Answer

The simplest units of all matter are ________, and many of these are essential to life.

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Definitions:

Sarcolemma

The cell membrane of a muscle fiber that encloses the cytoplasm and organelles of the cell and plays a critical role in muscle contraction.

Muscle Fiber

Muscle cell.

Myofilament

Extremely fine molecular thread helping form the myofibrils of muscle; thick myofilaments are formed of myosin, and thin myofilaments are formed of actin.

Myofibril

A basic rod-like unit of a muscle cell that is responsible for the muscle's contractile properties.