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What Is the Main Chemical Released by the Medulla in Sympathetic

question 18

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What is the main chemical released by the medulla in sympathetic stimulation?


Definitions:

Tetanus

A bacterial disease marked by rigidity and spasms of the muscles, caused by a toxin produced by Clostridium tetani.

Sarcomere

The basic unit of a muscle's cross-striated myofibril, responsible for muscle contraction and defined by the area between two Z lines.

Actin

One of two major proteins of muscle; makes up thin filaments in myofibrils of muscle fibers. See also myosin.

Myosin

A type of protein found in muscle tissue as a thick filament that plays a key role in muscle contraction and movement.

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