- A Endocrine gland
- B Salivary gland
- C Exocrine gland
- D Sebaceous gland
Correct answer: A. Endocrine gland
Explanation: Endocrine glands are ductless glands that secrete hormones directly into the blood, which then reach target organs throughout the body.
Concept context
The endocrine glands, hormone classification and mechanism of action, and negative feedback regulation.