In what way do hormones influence body processes?

Hormones play a crucial role in regulating various physiological processes in the body by entering the bloodstream and influencing distant organs. Once released from endocrine glands, these chemical messengers travel through the circulatory system to target cells and tissues, where they bind to specific receptors. This binding initiates a cascade of biochemical responses that can alter cellular activities, such as metabolism, growth, and mood regulation. For instance, hormones like insulin facilitate glucose uptake in various tissues, while adrenaline prepares the body for a 'fight or flight' response.

The other options do not accurately represent the primary function of hormones. Immediate muscle contractions result primarily from neural impulses rather than hormonal action. Electrical signals through neurons specifically pertain to the nervous system's function and communication, which is separate from hormonal signaling. Finally, hormones do not directly modify neuronal structures; instead, they can influence neuronal activity through various signaling pathways but do not alter the physical structure of neurons. Understanding the systemic nature of hormonal influence is crucial for grasping how they maintain homeostasis and support overall body functionality.