The body's slow chemical communication system; a set of glands that secrete hormones into the bloodstream is known as the what?

• A. Endocrine System
• B. Nervous System
• C. Digestive System
• D. Immune System

Answer: (A)

Think of the body’s slow chemical communication system as a hormone delivery network. The endocrine system is made up of glands that release hormones straight into the bloodstream. Once in the blood, these hormones travel to distant targets and coordinate processes like growth, metabolism, and reproduction. Because hormones move through the circulatory system, their effects are gradual to begin and tend to last longer than quick nerve signals. This slower, broader signaling contrasts with the nervous system, which uses neurons to transmit fast, immediate messages. Examples include insulin from the pancreas regulating blood sugar and adrenaline from the adrenal glands preparing the body for stress. Other systems serve different roles— the nervous system sends rapid signals, the digestive system handles food processing, and the immune system defends against pathogens. So the described system is the endocrine system.