Answer :
The statement "Endocrine hormones travel throughout the body but only have an effect on their target cells" is TRUE.
Here's why:
1. Endocrine hormones are chemical messengers produced by endocrine glands and released into the bloodstream.
2. These hormones travel in the blood to reach specific target cells or organs that have receptors for that particular hormone.
3. Once the hormone reaches its target cell, it binds to specific receptors on the cell surface or inside the cell.
4. The binding of the hormone to its receptor triggers a series of cellular responses or changes within the target cell.
5. Only cells that have the specific receptor for that hormone will respond to it, while other cells without the receptor will not be affected.
In summary, endocrine hormones travel throughout the body but exert their effects only on specific target cells that have the appropriate receptors for that particular hormone. This specificity ensures that hormones can regulate specific physiological processes in a precise and coordinated manner.
