Question

view this video
____ are released from endocrine glands directly into our bloodstream and carried to cells throughout our bodies.
hormones
nerve impulses
neurotransmitters
oxygen molecules

Explanation:

Hormones are secreted by endocrine glands into the bloodstream to reach cells throughout the body. Nerve impulses travel along neurons, neurotransmitters are released at synapses, and oxygen molecules are transported by red - blood cells but not released from endocrine glands in this context.

Answer:

A. Hormones