Final answer:
The word hormone originates from the Greek term meaning 'set in motion.'(D) Hormones are vital to the endocrine system, serving as chemical messengers that regulate various physiological functions.
Step-by-step explanation:
The word hormone is derived from a Greek word that means 'set in motion.'(D) Hormones are essential components of the endocrine system, functioning as chemical messenger molecules secreted into the blood by glands to regulate physiology and behavior. They are released in response to specific stimuli and exert their effects by binding to hormone receptors on target cells.
Hormones control a myriad of bodily functions ranging from growth and development to metabolism and reproduction. Some of these functions include managing blood sugar levels through hormones like glucagon, regulating growth with growth hormone (GH), and influencing reproductive processes with hormones like follicle-stimulating hormone (FSH).