Question

1. which of the following accurately describes how the endocrine system works?

carries messages by the blood
sends signals through connected glands
sends signals through electrical impulses
responds through neurons

Explanation:

The endocrine system uses hormones, which are chemical messengers released by glands into the bloodstream to travel to target cells and tissues. The other options describe the nervous system (electrical impulses, neurons) or incorrect characteristics of the endocrine system (its glands are not physically connected to send signals directly).

Answer:

A. carries messages by the blood