MCQs
Prepare for your Class 11 Biology exams with these top 50 MCQs on Chemical Coordination and Integration. These questions cover the endocrine system, hormones, and neural coordination, essential for NEET and CBSE exams.
Endocrine System MCQs for Class 11
Understanding the endocrine system is crucial for Class 11 students. These MCQs focus on the glands and hormones that regulate various body functions.
1. _________ are responsible for chemical coordination.
(a) Neurons
(b) Nephrons
(c) Hormones
(d) Enzymes
Answer: (c)
2. Neural coordination is
(a) Fast and long-lived
(b) Fast and short-lived
(c) Slow and long-lived
(d) Slow and short-lived
Answer: (b)
3. The ductless glands
(a) Produce non-nutrient intercellular messengers
(b) Are found only in non-chordates
(c) Are absent in the human body
(d) Are called exocrine glands
Answer: (a)
4. Which of the following is an incorrect statement?
(a) Hormones are required in trace amounts
(b) Hormones are intracellular messengers
(c) Hormones are secreted by endocrine glandular cells
(d) Hormones are secreted in response to a particular stimulus
Answer: (b)
5. Which of the following glands are present in the brain?
(a) Parathyroid gland and thyroid gland
(b) Pituitary gland and thymus
(c) Hypophysis and pineal gland
(d) Pineal gland and thymus
Answer: (c)
6. The two glands located in the neck region are
(a) Thyroid gland and parathyroid gland
(b) Pituitary gland and pineal gland
(c) Adrenal gland and thymus
(d) Pineal gland and thyroid gland
Answer: (a)
7. The hypothalamus forms an important link between
(a) Digestive system and nervous system
(b) Nervous system and respiratory system
(c) Nervous system and endocrine system
(d) Integumentary system and reproductive system
Answer: (c)
8. The neurosecretory cells of the hypothalamus which produce hormones are called
(a) Nephrons
(b) Nuclei
(c) Granular cells
(d) Globular cells
Answer: (b)
9. Hypothalamic hormones directly regulate the synthesis and secretion of
(a) Thyroid hormones
(b) Pituitary hormones
(c) Adrenal hormones
(d) Parathormone
Answer: (b)
10. Somatostatin inhibits the release of
(a) Prolactin
(b) Melanin
(c) Thymosin
(d) Growth hormone
Answer: (d)
11. GnRH stimulates _________ to release ________.
(a) Hypothalamus, gonadotropins
(b) Pituitary gland, gonadotropins
(c) Pituitary gland, growth hormone
(d) Hypothalamus, growth hormone
Answer: (b)
12. Which of the following is under the direct control of neurosecretory cells?
(a) Pars distalis and pars intermedia
(b) Pars intermedia and pars nervosa
(c) Pars nervosa only
(d) Pars distalis only
Answer: (c)
13. The neuroendocrine structure is
(a) Hypothalamus
(b) Adrenal cortex
(c) Pancreas
(d) Thyroid
Answer: (a)
14. Adenohypophysis in humans consists of two portions:
(a) Pars distalis and Pars nervosa
(b) Pars intermedia and Pars distalis
(c) Pars nervosa and Pars intermedia
(d) Anterior and posterior pituitary
Answer: (b)
15. Which of the following hormones is not released by the pars distalis in a frog?
(a) Growth hormone
(b) Prolactin
(c) Melanocyte-stimulating hormone
(d) Luteinizing hormone
Answer: (c)
16. Melanocyte-stimulating hormone in a frog is released by
(a) Hypothalamus
(b) Pars nervosa
(c) Pars distalis
(d) Pars intermedia
Answer: (d)
17. The hormone which promotes protein anabolism, absorption of calcium from the bowel, and retards the use of blood glucose for ATP production is
(a) Growth hormone
(b) Insulin
(c) Oxytocin
(d) Calcitonin
Answer: (a)
18. Anterior pituitary is also known as
(a) Neurohypophysis
(b) Adenohypophysis
(c) Hypothalamus
(d) Corpus luteum
Answer: (b)
19. Which of the following is incorrectly paired?
(a) Thyroxine - Protein metabolism
(b) Cortisol - Carbohydrate metabolism
(c) Insulin - Lipid metabolism
(d) Glucagon - Glycogenolysis
Answer: (c)
20. Acromegaly in adults is caused by an overproduction of
(a) Growth hormone
(b) Cortisol
(c) Thyroxine
(d) Insulin
Answer: (a)
21. Which of the following is a glycoprotein?
(a) FSH
(b) TSH
(c) LH
(d) All of the above
Answer: (d)
22. Prolactin is secreted by
(a) Pars intermedia
(b) Pars distalis
(c) Pars nervosa
(d) Pars intermedia and Pars distalis
Answer: (b)
23. Which of the following promotes protein synthesis, tissue building, and growth?
(a) Melatonin
(b) Thymosin
(c) Growth hormone
(d) Oxytocin
Answer: (c)
24. Which of the following does not act through cell membrane receptors?
(a) Insulin
(b) Estrogen
(c) Adrenaline
(d) Glucagon
Answer: (b)
25. Which of the following induces uterine contractions?
(a) Thyroxine
(b) Prolactin
(c) Oxytocin
(d) Growth hormone
Answer: (c)
26. Diabetes insipidus is due to the hyposecretion of
(a) Prolactin
(b) Oxytocin
(c) Glucagon
(d) ADH
Answer: (d)
27. Oxytocin is released from
(a) Hypothalamus
(b) Pars distalis
(c) Pars nervosa
(d) Pars intermedia
Answer: (c)
28. Which of the following is not a function of oxytocin?
(a) Stimulates uterine contractions during labor
(b) Causes the mammary glands to secrete milk
(c) Promotes maternal behavior
(d) Causes the mammary glands to secrete milk and stimulates uterine contractions during labor
Answer: (b)
29. Which of the following hormones regulates metabolism of carbohydrates, fats, and proteins?
(a) Insulin
(b) Cortisol
(c) Epinephrine
(d) Glucagon
Answer: (b)
30. Cretinism is caused by
(a) Hyperthyroidism
(b) Hypothyroidism
(c) Hypoparathyroidism
(d) Hyperparathyroidism
Answer: (b)
31. Which of the following is mismatched?
(a) Somatostatin – Inhibits the release of growth hormone
(b) Adrenaline – Increases blood sugar level
(c) Insulin – Increases blood sugar level
(d) Cortisol – Promotes glucogenesis
Answer: (c)
32. Pheochromocytoma is a tumor of
(a) Parathyroid gland
(b) Adrenal medulla
(c) Adrenal cortex
(d) Pituitary gland
Answer: (b)
33. The hormone epinephrine is secreted by
(a) Thyroid gland
(b) Adrenal medulla
(c) Parathyroid gland
(d) Hypothalamus
Answer: (b)
34. Which of the following cells secrete calcitonin?
(a) Parafollicular cells of the thyroid gland
(b) Chief cells of the parathyroid gland
(c) Parafollicular cells of the parathyroid gland
(d) Beta cells of the pancreas
Answer: (a)
35. The most abundant thyroid hormone produced is
(a) Thyroxine (T4)
(b) Triiodothyronine (T3)
(c) Tetraiodothyronine
(d) Calcitonin
Answer: (a)
36. Which of the following is incorrect about the adrenal glands?
(a) They are present at the top of each kidney
(b) They produce aldosterone
(c) They produce estrogen
(d) They produce adrenaline
Answer: (c)
37. Which of the following is not an endocrine gland?
(a) Pancreas
(b) Liver
(c) Adrenal gland
(d) Pituitary gland
Answer: (b)
38. The hormone which lowers blood calcium level is
(a) Calcitonin
(b) Parathyroid hormone
(c) Insulin
(d) Glucagon
Answer: (a)
39. Which of the following hormones is responsible for milk ejection during breastfeeding?
(a) Prolactin
(b) Oxytocin
(c) Estrogen
(d) Progesterone
Answer: (b)
40. Which hormone stimulates the release of thyroid-stimulating hormone (TSH) from the anterior pituitary?
(a) Thyroxine
(b) Thyrotropin-releasing hormone (TRH)
(c) Cortisol
(d) Growth hormone
Answer: (b)
41. Which hormone is primarily responsible for regulating circadian rhythms?
(a) Melatonin
(b) Cortisol
(c) Growth hormone
(d) Oxytocin
Answer: (a)
42. Which hormone plays a crucial role in regulating water balance in the body?
(a) Aldosterone
(b) Antidiuretic hormone (ADH)
(c) Cortisol
(d) Thyroxine
Answer: (b)
43. Which of the following is not secreted by the adrenal cortex?
(a) Cortisol
(b) Aldosterone
(c) Adrenaline
(d) Androgens
Answer: (c)
44. Which hormone is involved in the regulation of the immune system?
(a) Thymosin
(b) Insulin
(c) Glucagon
(d) Thyroxine
Answer: (a)
45. Which of the following is the main hormone secreted by the pineal gland?
(a) Melatonin
(b) Serotonin
(c) Dopamine
(d) Epinephrine
Answer: (a)
46. Which hormone is involved in the fight-or-flight response?
(a) Insulin
(b) Epinephrine
(c) Thyroxine
(d) Growth hormone
Answer: (b)
47. Which hormone is responsible for stimulating the production of red blood cells?
(a) Insulin
(b) Erythropoietin
(c) Calcitonin
(d) Thyroxine
Answer: (b)
48. Which hormone regulates the balance of sodium and potassium in the body?
(a) Aldosterone
(b) Cortisol
(c) Insulin
(d) Adrenaline
Answer: (a)
49. Which of the following is a hormone produced by the pancreas?
(a) Glucagon
(b) Insulin
(c) Somatostatin
(d) All of the above
Answer: (d)
50. Which hormone is secreted by the corpus luteum after ovulation?
(a) Estrogen
(b) Progesterone
(c) Oxytocin
(d) Prolactin
Answer: (b)
Chemical Coordination and Integration MCQ Biology for NEET
For more practice, check out our Class 11 Biology MCQs page.
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