Question

1. the endocrine system is a network of which of the following?

lipids
hypersecretions
ductless glands
specialized cells

Explanation:

The endocrine system consists of ductless glands that secrete hormones directly into the bloodstream. Specialized cells are part of various tissues and organs, not specifically the endocrine system's defining feature. Hypersecretions refer to excessive hormone production (a malfunction, not the system's structure). Lipids are a class of molecules (some hormones are lipid - based, but not the system's network description).

Answer:

Ductless glands