What is the primary function of hormones in cell regulation?

Hormones primarily function as signaling molecules that regulate various physiological processes, including growth, metabolism, and homeostasis. They are secreted by endocrine glands and travel through the bloodstream to target tissues, where they bind to specific receptors and initiate cellular responses. This regulatory role is crucial for maintaining balance within the body, influencing processes such as cell division, energy utilization, and overall metabolic functions.

The signaling function of hormones allows for coordinated communication between different organs and systems, helping the body respond effectively to changes in the internal and external environment. Their ability to modulate cellular activities underscores their importance in regulating functions that are vital for health and development.

Other options, such as initiating apoptosis, providing energy sources, or creating physical barriers, do not capture the fundamental role of hormones in regulating cell behavior and physiological processes.