The Portion of the Electromagnetic Spectrum Between the 21-Cm Line

question 16

Short Answer

The portion of the electromagnetic spectrum between the 21-cm line of neutral hydrogen and the 18-cm line of OH is known as the ____________.

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Definitions:

Parasympathetic Division

Part of the autonomic nervous system responsible for rest and digestion functions, decreasing heart rate, and increasing intestinal activity.

Preganglionic Neurons

are neurons originating in the central nervous system that extend to autonomic ganglia, communicating signals to postganglionic neurons outside the central nervous system.

Pelvic Splanchnic Nerves

Nerves that arise from the sacral spinal cord, innervating the lower abdomen, pelvis, and contributing to the function of urinary and reproductive organs.

Parasympathetic Division

A division of the autonomic nervous system that conserves energy by slowing the heart rate and increasing digestive and glandular activities.