1. Which of the following is the primary function of the endocrine system?
A) Digestion
B) Hormone secretion
C) Circulation
D) Respiration
Answer: B) Hormone secretion
2. Which of the following glands is known as the “master gland” of the body?
A) Thyroid
B) Pituitary
C) Adrenal
D) Pancreas
Answer: B) Pituitary
3. The hormone insulin is produced by which gland?
A) Adrenal gland
B) Thyroid
C) Pancreas
D) Pineal gland
Answer: C) Pancreas
4. The secretion of which hormone is controlled by the hypothalamus?
A) Adrenaline
B) Thyroxine
C) Growth hormone
D) Estrogen
Answer: C) Growth hormone
5. What is the primary function of thyroid hormones?
A) Regulate metabolism
B) Stimulate growth
C) Regulate water balance
D) Control reproductive functions
Answer: A) Regulate metabolism
6. Which gland produces the hormone adrenaline?
A) Pineal gland
B) Adrenal gland
C) Pituitary gland
D) Hypothalamus
Answer: B) Adrenal gland
7. The hormone that regulates blood sugar levels is:
A) Thyroxine
B) Insulin
C) Growth hormone
D) Progesterone
Answer: B) Insulin
8. Which of the following is NOT a function of the endocrine system?
A) Metabolism regulation
B) Growth and development
C) Immune defense
D) Reproductive control
Answer: C) Immune defense
9. The hormone cortisol is secreted by which gland?
A) Pituitary
B) Adrenal
C) Pancreas
D) Ovaries
Answer: B) Adrenal
10. Which gland regulates the sleep-wake cycle by secreting melatonin?
A) Pineal gland
B) Pituitary gland
C) Thyroid
D) Thymus
Answer: A) Pineal gland
11. What is the main function of parathyroid hormone (PTH)?
A) Stimulate red blood cell production
B) Regulate calcium levels in the blood
C) Control body temperature
D) Stimulate digestion
Answer: B) Regulate calcium levels in the blood
12. Which of the following hormones is involved in the stress response?
A) Insulin
B) Adrenaline
C) Estrogen
D) Progesterone
Answer: B) Adrenaline
13. The release of oxytocin occurs from which gland?
A) Pituitary gland
B) Thyroid gland
C) Adrenal gland
D) Pancreas
Answer: A) Pituitary gland
14. What is the role of thyroid-stimulating hormone (TSH)?
A) Stimulate the thyroid gland to release thyroid hormones
B) Stimulate the adrenal gland to release cortisol
C) Regulate the production of red blood cells
D) Stimulate ovulation
Answer: A) Stimulate the thyroid gland to release thyroid hormones
15. Which gland is responsible for the production of progesterone and estrogen?
A) Pancreas
B) Ovaries
C) Pituitary gland
D) Adrenal gland
Answer: B) Ovaries
16. Which hormone is responsible for stimulating the growth of bones and tissues during childhood?
A) Thyroxine
B) Growth hormone
C) Insulin
D) Epinephrine
Answer: B) Growth hormone
17. The secretion of aldosterone by the adrenal glands primarily helps in:
A) Regulating blood sugar levels
B) Regulating blood pressure
C) Stimulating growth
D) Controlling reproductive cycles
Answer: B) Regulating blood pressure
18. What type of hormone is insulin?
A) Peptide hormone
B) Steroid hormone
C) Amino acid-derived hormone
D) Eicosanoid hormone
Answer: A) Peptide hormone
19. The pancreas functions as both an endocrine and exocrine gland. Which of the following is an endocrine function of the pancreas?
A) Secretion of digestive enzymes
B) Secretion of insulin
C) Secretion of bile
D) Absorption of nutrients
Answer: B) Secretion of insulin
20. What is the function of luteinizing hormone (LH)?
A) Stimulates the release of eggs from ovaries
B) Stimulates milk production
C) Regulates blood pressure
D) Controls metabolism
Answer: A) Stimulates the release of eggs from ovaries
21. Which hormone helps in the retention of water by the kidneys?
A) Antidiuretic hormone (ADH)
B) Progesterone
C) Insulin
D) Cortisol
Answer: A) Antidiuretic hormone (ADH)
22. The thymus gland is primarily involved in the production of:
A) Red blood cells
B) White blood cells
C) Lymphocytes
D) Platelets
Answer: C) Lymphocytes
23. Which hormone is responsible for preparing the body for “fight or flight”?
A) Adrenaline
B) Testosterone
C) Estrogen
D) Insulin
Answer: A) Adrenaline
24. Where are the adrenal glands located in the human body?
A) On top of the kidneys
B) In the neck
C) In the brain
D) Near the heart
Answer: A) On top of the kidneys
25. The secretion of which hormone is increased during pregnancy?
A) Progesterone
B) Insulin
C) Thyroxine
D) Testosterone
Answer: A) Progesterone
26. Which of the following glands regulates the body’s metabolism by releasing thyroxine?
A) Pineal gland
B) Adrenal gland
C) Thyroid gland
D) Pituitary gland
Answer: C) Thyroid gland
27. The hormone prolactin is produced by the:
A) Pituitary gland
B) Pineal gland
C) Ovaries
D) Testes
Answer: A) Pituitary gland
28. Which hormone is responsible for the development of secondary sexual characteristics in males?
A) Estrogen
B) Progesterone
C) Testosterone
D) Thyroxine
Answer: C) Testosterone
29. Which gland secretes both insulin and glucagon?
A) Thyroid
B) Pituitary
C) Adrenal
D) Pancreas
Answer: D) Pancreas
30. What is the function of the hormone calcitonin?
A) Increase calcium levels in the blood
B) Decrease calcium levels in the blood
C) Regulate glucose levels
D) Promote protein synthesis
Answer: B) Decrease calcium levels in the blood
These MCQs cover various aspects of the endocrine system, including the hormones produced by different glands and their specific functions.
