An endocrinologist is a physician who specializes in

• A. Physician specialized in endocrine system & exocrine glands
• B. Physician specialized in nervous system
• C. Physician specialized in digestive system
• D. Physician specialized in kidneys and urinary system

Answer: (A)

The field focuses on the glands that release hormones into the bloodstream and regulate many body functions. Hormones act as chemical messengers that travel through blood to distant targets, coordinating metabolism, growth, reproduction, and the stress response. An endocrinologist diagnoses and treats disorders of these hormone-secreting glands—such as the pituitary, thyroid, adrenal glands, pancreas, and gonads—and conditions like diabetes or thyroid disease. That makes the option describing the endocrine system the best fit, since the other choices point to different body systems (nervous system, digestive system, and kidneys/urinary system). The mention of exocrine glands doesn’t change the core focus on the endocrine system and its hormones.