Question

What is a major function of the endocrine system?

1) The endocrine system releases hormones into the bloodstream to reach receptors on target cells.
2) The endocrine system secretes products into ducts that lead to body surfaces or cavities.
3) The endocrine system produces immediate, short-lasting effects.
4) The endocrine system communicates directly with target cells through the use of neurotransmitters.

Answer 1

The endocrine system's primary function is to secrete hormones into the bloodstream, which regulate a variety of long-term body processes by interacting with specific target cells throughout the body.

Step-by-step explanation:

The major function of the endocrine system is the production and release of hormones into the bloodstream to reach receptors on target cells. Endocrine glands, which are ductless, secrete these hormones that circulate throughout the body, regulating various physiological processes by binding to receptors on cells that have the capacity to respond to these hormonal signals. Unlike exocrine glands that secrete substances through ducts, the endocrine glands release hormones directly into the surrounding fluid. The endocrine hormones facilitate long-term, widespread effects on functions such as metabolism, growth, and sexual development, often in response to signals from the nervous system, with which the endocrine system works in close coordination.