1. Which of the following hormones is primarily responsible for regulating blood sugar levels?
A) Insulin
B) Adrenaline
C) Thyroxine
D) Estrogen
Answer: A) Insulin
2. What is the primary function of glucagon in the body?
A) Decrease blood sugar levels
B) Increase blood sugar levels
C) Stimulate growth
D) Regulate water balance
Answer: B) Increase blood sugar levels
3. Which gland is responsible for secreting growth hormone (GH)?
A) Pituitary gland
B) Thyroid gland
C) Pancreas
D) Adrenal glands
Answer: A) Pituitary gland
4. Which hormone is known as the “stress hormone”?
A) Testosterone
B) Cortisol
C) Progesterone
D) Insulin
Answer: B) Cortisol
5. The release of insulin from the pancreas is stimulated by:
A) High blood glucose levels
B) Low blood glucose levels
C) High blood pressure
D) Stress
Answer: A) High blood glucose levels
6. Which hormone regulates the circadian rhythm?
A) Melatonin
B) Cortisol
C) Estrogen
D) Thyroid hormone
Answer: A) Melatonin
7. Which of the following hormones is released by the adrenal medulla in response to stress?
A) Epinephrine
B) Aldosterone
C) Insulin
D) Oxytocin
Answer: A) Epinephrine
8. Thyroid hormone production is regulated by which hormone?
A) Luteinizing hormone (LH)
B) Follicle-stimulating hormone (FSH)
C) Thyroid-stimulating hormone (TSH)
D) Adrenocorticotropic hormone (ACTH)
Answer: C) Thyroid-stimulating hormone (TSH)
9. Which hormone plays a crucial role in milk production during lactation?
A) Progesterone
B) Prolactin
C) Oxytocin
D) Estrogen
Answer: B) Prolactin
10. The hormone responsible for the fight-or-flight response is:
A) Insulin
B) Testosterone
C) Epinephrine
D) Growth hormone
Answer: C) Epinephrine
11. Which hormone stimulates the production of red blood cells in bone marrow?
A) Erythropoietin
B) Adrenaline
C) Follicle-stimulating hormone
D) Luteinizing hormone
Answer: A) Erythropoietin
12. The function of aldosterone is primarily to:
A) Regulate blood glucose levels
B) Regulate salt and water balance
C) Stimulate milk production
D) Control sexual development
Answer: B) Regulate salt and water balance
13. Which of the following hormones is involved in regulating metabolism?
A) Thyroxine
B) Oxytocin
C) Adrenaline
D) Insulin
Answer: A) Thyroxine
14. Which of the following is a function of parathyroid hormone (PTH)?
A) Increase calcium levels in the blood
B) Lower calcium levels in the blood
C) Stimulate bone formation
D) Regulate sleep-wake cycle
Answer: A) Increase calcium levels in the blood
15. Which of these hormones is involved in regulating the menstrual cycle?
A) Cortisol
B) Progesterone
C) Insulin
D) Adrenaline
Answer: B) Progesterone
16. Which hormone is secreted by the beta cells of the pancreas?
A) Insulin
B) Glucagon
C) Epinephrine
D) Cortisol
Answer: A) Insulin
17. Which hormone increases the absorption of calcium in the intestine?
A) Calcitonin
B) Parathyroid hormone
C) Vitamin D
D) Cortisol
Answer: C) Vitamin D
18. What is the primary function of antidiuretic hormone (ADH)?
A) Increase urine production
B) Stimulate thirst
C) Increase water retention in the kidneys
D) Stimulate milk production
Answer: C) Increase water retention in the kidneys
19. Which hormone regulates the body’s metabolism and heat production?
A) Thyroxine
B) Insulin
C) Progesterone
D) Melatonin
Answer: A) Thyroxine
20. The release of oxytocin is stimulated by:
A) Dehydration
B) Stress
C) Uterine contractions during labor
D) Low blood sugar levels
Answer: C) Uterine contractions during labor
21. Which hormone is responsible for the release of sperm in males?
A) Testosterone
B) Luteinizing hormone (LH)
C) Follicle-stimulating hormone (FSH)
D) Prolactin
Answer: B) Luteinizing hormone (LH)
22. Which of the following hormones is involved in the regulation of blood pressure?
A) Insulin
B) Aldosterone
C) Estrogen
D) Prolactin
Answer: B) Aldosterone
23. What effect does insulin have on cells?
A) It causes cells to absorb glucose
B) It increases the breakdown of fats
C) It stimulates the release of adrenaline
D) It inhibits the production of glucose
Answer: A) It causes cells to absorb glucose
24. What is the role of cortisol in the body?
A) Stimulates muscle growth
B) Regulates blood sugar levels during stress
C) Promotes bone growth
D) Stimulates the release of insulin
Answer: B) Regulates blood sugar levels during stress
25. Which hormone increases uterine contractions during labor?
A) Prolactin
B) Oxytocin
C) Estrogen
D) Progesterone
Answer: B) Oxytocin
26. Which of the following hormones is secreted by the pineal gland?
A) Melatonin
B) Insulin
C) Glucagon
D) Cortisol
Answer: A) Melatonin
27. The hormone leptin is involved in:
A) Regulating blood glucose levels
B) Regulating body weight and appetite
C) Stimulating red blood cell production
D) Enhancing memory
Answer: B) Regulating body weight and appetite
28. Which hormone promotes the maturation of ovarian follicles in females?
A) Luteinizing hormone (LH)
B) Follicle-stimulating hormone (FSH)
C) Estrogen
D) Progesterone
Answer: B) Follicle-stimulating hormone (FSH)
29. Which hormone is involved in regulating the sleep-wake cycle?
A) Melatonin
B) Thyroxine
C) Estrogen
D) Cortisol
Answer: A) Melatonin
30. Which hormone promotes the development of secondary sexual characteristics in males?
A) Estrogen
B) Testosterone
C) Progesterone
D) Follicle-stimulating hormone (FSH)
Answer: B) Testosterone
These MCQs cover the main aspects of hormones and their biochemical pathways, helping students better understand the role and regulation of hormones in the human body.
