Endocrine

A) Chemicals produced by neurons that function as hormones
B) Chemicals that act locally on nearby cells
C) Chemical secreted by presynaptic terminal
D) Influences same cell type from which it is secreted
E) Chemical secreted into blood by specialized cells; travels some distance to target tissues

Endocrine

Pertains to the system of glands that release hormones directly into the bloodstream to regulate body functions.

Chemical Secreted into Blood

Substances released by cells or glands into the bloodstream to act on distant target organs or tissues.

Specialized Cells

Cells that have developed distinct characteristics and functions, adapted to perform a specific role within an organism.