Endocrine system description

As stated earlier, the annual cycles of species and populations divide into periods. The overall description would be the syndrome of the population, while individual metabolic characteristics would be symptoms , borrowing terms from the medical profession. Each period manifests a specific set of metabolic features which support the normal course of vital processes in the population, and the population would enter the next period of the cycle only if the preceding step had been completed. If it had not, the situation would lead to that mass mortality which is so common in nature. The change in metabolism is triggered with the help of the endocrine system, as will be described in the next section. 

Pharmacologic profile The pharmacologic profile is a description of all the pharmacologic effects of a drug (eg, effects on blood pressure, gastrointestinal activity, respiration, renal function, endocrine function, the central nervous system). 

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