Question

are powerful chemical substances secreted by the endocrine glands and carried through the body by the bloodstream. multiple choice carbohydrates phospholipids hormones neurotransmitters

Explanation:

Hormones are chemicals secreted by endocrine glands and transported via the bloodstream. Carbohydrates are energy - providing macromolecules. Phospholipids are part of cell membranes. Neurotransmitters are for neural communication (not endocrine - bloodstream based).

Answer:

Hormones