Which of the Following Statements About the Endocrine System Is

Question

Which of the following statements about the endocrine system isfalse?
A)It has target cells that are mainly in distant tissues.
B)It affects only cells with appropriate receptors.
C)It releases secretions directly into body fluids.
D)It is regulated by negative feedback mechanisms.
E)It releases hormones,all of which are lipids,directly into the bloodstream.

Accepted Answer

The statement "It releases hormones, all of which are lipids, directly into the bloodstream" is false. While some hormones are lipids, others are peptides or amino acid derivatives. Also, hormones are not always released directly into the bloodstream; some are released into other body fluids (e.g. sweat, saliva) or into surrounding tissues.

Which of the following statements about the endocrine system is false?