The correct Answer is A-4, B-1, C-2, D-3
Explanation
This question assesses knowledge of the endocrine system, specifically the hormones produced by various endocrine glands in the human body. Endocrine glands secrete hormones directly into the bloodstream to regulate various bodily functions.
Statement-wise Analysis
- A. Adrenaline: This hormone is produced by the adrenal glands. The adrenal glands are located on top of each kidney and consist of an outer cortex and an inner medulla. Adrenaline (also known as epinephrine) is secreted by the adrenal medulla. Therefore, A matches with 4.
- B. Insulin: This hormone is produced by the pancreas. The pancreas is a mixed gland, functioning as both an exocrine and an endocrine gland. Its endocrine function involves the secretion of hormones like insulin and glucagon by the islets of Langerhans, which regulate blood sugar levels. Therefore, B matches with 1.
- C. Thyroxin: This hormone is produced by the thyroid gland. The thyroid gland is located in the neck, anterior to the trachea, and produces thyroid hormones, primarily thyroxine (T4) and triiodothyronine (T3), which regulate metabolism. Therefore, C matches with 2.
- D. Growth hormone: This hormone is produced by the pituitary gland. The pituitary gland, often called the "master gland," is located at the base of the brain and secretes several hormones, including growth hormone, which stimulates growth and cell reproduction. Therefore, D matches with 3.
Thus, the correct matching is A-4, B-1, C-2, D-3.
Key Takeaway
Knowledge of the specific hormones secreted by major endocrine glands and their functions is fundamental to understanding the human endocrine system.