1. What is the primary function of the endocrine system?
A) Secreting substances through ducts
B) Producing hormones to regulate body functions
C) Breaking down food for digestion
D) Transporting oxygen in the blood
Answer: B) Producing hormones that regulate body functions
2. Which of the following glands is part of the endocrine system?
A) Salivary gland
B) Sweat gland
C) Thyroid gland
D) Sebaceous gland
Answer: C) Thyroid gland
3. Endocrine glands secrete hormones directly into:
A) Ducts
B) Lymphatic vessels
C) The bloodstream
D) The digestive tract
Answer: C) The bloodstream
4. The hormone responsible for regulating blood sugar levels is:
A) Insulin
B) Thyroxine
C) Adrenaline
D) Testosterone
Answer: A) Insulin
5. Which gland is known as the “master gland” of the endocrine system?
A) Thyroid gland
B) Pituitary gland
C) Adrenal gland
D) Pancreas
Answer: B) Pituitary gland
6. The exocrine system releases secretions through:
A) Blood vessels
B) Nerves
C) Ducts
D) Hormones
Answer: C) Ducts
7. Which of the following is an example of an exocrine gland?
A) Pancreas (endocrine function)
B) Sweat gland
C) Adrenal gland
D) Pituitary gland
Answer: B) Sweat gland
8. Which hormone helps regulate the body’s metabolism?
A) Cortisol
B) Insulin
C) Thyroxine
D) Prolactin
Answer: C) Thyroxine
9. The adrenal glands primarily secrete which hormone in response to stress?
A) Insulin
B) Estrogen
C) Cortisol
D) Oxytocin
Answer: C) Cortisol
10. Which hormone is responsible for stimulating growth in children?
A) Estrogen
B) Growth hormone (GH)
C) Testosterone
D) Oxytocin
Answer: B) Growth hormone (GH)
11. Which hormone is released by the pancreas to lower blood glucose levels?
A) Insulin
B) Glucagon
C) Cortisol
D) Aldosterone
Answer: A) Insulin
12. What role does aldosterone play in the endocrine system?
A) Regulates metabolism
B) Maintains blood pressure and electrolyte balance
C) Stimulates milk production
D) Promotes muscle growth
Answer: B) Maintains blood pressure and electrolyte balance
13. The hormone responsible for female secondary sexual characteristics is:
A) Testosterone
B) Oxytocin
C) Estrogen
D) Progesterone
Answer: C) Estrogen
14. Which gland is responsible for the body’s circadian rhythm regulation?
A) Pituitary gland
B) Thyroid gland
C) Pineal gland
D) Pancreas
Answer: C) Pineal gland
15. What is the main function of glucagon?
A) Decrease blood sugar levels
B) Increase blood sugar levels
C) Regulate calcium levels
D) Control water balance
Answer: B) Increase blood sugar levels
16. The endocrine system maintains homeostasis by:
A) Producing enzymes for digestion
B) Controlling voluntary muscle movement
C) Secreting hormones that regulate internal balance
D) Filtering waste from the blood
Answer: C) Secreting hormones that regulate internal balance
17. Which of the following glands secretes adrenaline?
A) Thyroid gland
B) Pituitary gland
C) Adrenal gland
D) Parathyroid gland
Answer: C) Adrenal gland
18. The hormone oxytocin primarily affects which function?
A) Blood sugar regulation
B) Metabolism
C) Uterine contraction during childbirth
D) Calcium absorption
Answer: C) Uterine contraction during childbirth
19. What is the role of the parathyroid gland?
A) Regulating blood calcium levels
B) Controlling metabolic rate
C) Producing adrenaline
D) Regulating reproductive functions
Answer: A) Regulating blood calcium levels
20. Which gland controls the release of thyroid hormones?
A) Pancreas
B) Pituitary gland
C) Adrenal gland
D) Parathyroid gland
Answer: B) Pituitary gland
