Biology Regents Practice Exam 2026 – The All-in-One Guide to Master Your Regents!

The endocrine system plays a crucial role in the body by producing and secreting hormones, which are chemical messengers that travel through the bloodstream to target organs and tissues. These hormones regulate a wide array of bodily functions, including growth and development, metabolism, reproduction, and mood.

The secretion of hormones occurs in various glands, such as the pituitary, thyroid, adrenal glands, and pancreas, and each gland has its specific functions and target tissues. For instance, insulin from the pancreas regulates blood glucose levels, while thyroid hormones influence metabolic rate.

This system's coordination of hormone release allows the body to respond effectively to changes internally and externally, thereby maintaining overall health and optimal functioning. While other systems, like the nervous system, also play roles in homeostasis and bodily functions, the endocrine system uniquely focuses on hormonal regulation, distinguishing it from functions such as regulation of body temperature or immune responses.