Final answer:
These terms relate to the aspects of the sympathetic nervous system rather than the somatotropin organization, which is concerned with growth hormone activity and effects on body structure and metabolism. The sympathetic fibers such as preganglionic and postganglionic can impact somatotropin functions indirectly through stress and metabolic changes.
Step-by-step explanation:
The question is related to somatotropic organization, which is typically associated with the growth hormone activity in the body, specifically referring to its effects on body structure and metabolism. Neither A delta nor C fibers are directly related to somatotropin functions; however, if we assume 'A' and 'B' are organs within the endocrine system, then A1 and B1 would likely be molecules of hormones, which are chemical messengers that regulate various physiological processes. Among the fibers mentioned, prenagliongic sympathetic and postganglionic sympathetic are parts of the sympathetic nervous system, which is involved in the 'fight or flight' response, and can indirectly influence somatotropin activities by affecting stress levels and metabolism.