Question

endocrine properties
which of these is not a characteristic of a hormone?
reaches targets through the blood
effects are caused by chemicals
effects are rapid
effects are slow and cyclic

Explanation:

Hormones are chemical messengers that are secreted by endocrine glands into the bloodstream. They travel through the blood to reach their target cells or organs. The effects of hormones are typically slow - acting and can be cyclic, as they regulate various physiological processes over time. For example, thyroid hormones regulate metabolism gradually. In contrast, the nervous system has rapid effects (e.g., a reflex action). Since hormones are chemical substances, their effects are caused by these chemicals.

Answer:

Effects are rapid