Correct Option
The correct option is (c) 1 and 3 only.
Explanation
The endocrine system consists of ductless glands that regulate various bodily functions through chemical messengers known as hormones. These hormones are secreted directly into the circulatory system to affect distant organs or tissues.
Statement-wise Analysis
- Statement 1 is Correct: Endocrine glands are ductless glands. They release hormones directly into the bloodstream rather than through ducts. The blood transports these hormones to specific organs or tissues known as the target site, where they elicit a specific physiological response.
- Statement 2 is Incorrect: The pituitary gland is located at the base of the brain (specifically attached to the hypothalamus), not inside the pancreas. The pancreas is a separate gland located in the abdomen, functioning as both an exocrine and endocrine gland.
- Statement 3 is Correct: The pituitary gland is often referred to as the "master gland" because it controls the function of many other endocrine glands. It secretes gonadotropins (such as Luteinizing Hormone and Follicle Stimulating Hormone) that stimulate the testes in males to produce testosterone and the ovaries in females to produce estrogen and progesterone.
Key Takeaway: Endocrine glands are ductless and transport hormones via the blood. The pituitary gland is located in the brain and regulates the activity of the gonads (testes and ovaries), whereas the pancreas is an abdominal organ involved in blood sugar regulation and digestion.