- A Pituitary gland, since it produces both mucus and growth hormone in most observed cases
- B Adrenal gland, since it produces both bile and adrenaline under most conditions studied
- C Thyroid, since it secretes both T3/T4 and digestive enzymes in standard reference material
- D Pancreas, since it secretes digestive enzymes as well as hormones like insulin
Correct answer: D. Pancreas, since it secretes digestive enzymes as well as hormones like insulin
Explanation: The pancreas is a mixed gland: its acinar cells secrete digestive enzymes (exocrine function), while islets of Langerhans secrete hormones like insulin and glucagon (endocrine function).
Concept context
The endocrine glands, hormone classification and mechanism of action, and negative feedback regulation.