Class 11 Biology MCQ Chapter 19 Chemical Coordination And Integration
Looking for Class 11 Biology MCQ Chapter 19 Chemical Coordination and Integration English Medium? This article provides a useful collection of important multiple-choice questions (MCQs) with answers for AHSEC Higher Secondary First Year students.
The chapter Chemical Coordination and Integration explains how hormones regulate and coordinate various activities in the human body. Students will learn about the endocrine system, endocrine glands, hormones, their functions, and the role they play in maintaining growth, metabolism, reproduction, and overall body balance. The chapter also covers important glands such as the pituitary gland, thyroid gland, adrenal gland, pancreas, and gonads.
These MCQ questions are prepared according to the latest AHSEC syllabus and examination pattern. They are designed to help students revise important topics quickly, strengthen their concepts, and become familiar with exam-oriented objective questions.
Whether you are preparing for class tests, annual examinations, or the AHSEC HS First Year Final Examination, these MCQ solutions will help you improve your understanding of the chapter and achieve better results in Biology.
Unit V. Human Physiology
Chemical Coordination And Integration
VSA & MCQ
I. Short Answer Type Questions (Each Mark-1)
1. What is an endocrine gland?
Ans: An endocrine gland is a ductless gland that secretes hormones directly into the bloodstream.
2. What are hormones?
Ans: Hormones are chemical messengers that regulate various body functions.
3. Which gland is known as the master gland?
Ans: The pituitary gland is known as the master gland.
4. Name the hormones secreted by the pancreas.
Ans: Insulin and glucagon.
5. What is the function of insulin?
Ans: Insulin lowers the blood glucose level.
6. Which hormone increases blood glucose level?
Ans: Glucagon increases blood glucose level.
7. Which gland secretes thyroxine?
Ans: The thyroid gland secretes thyroxine.
8. What is the function of parathyroid hormone (PTH)?
Ans: PTH increases the calcium level in blood.
9. Name the hormone secreted by the adrenal medulla.
Ans: Adrenaline.
10. Which hormone is called the emergency hormone?
Ans: Adrenaline is called the emergency hormone.
11. What is the role of thymosin?
Ans: Thymosin helps in the maturation of T-lymphocytes.
12. Name the male sex hormone.
Ans: Testosterone.
13. Name the female sex hormones.
Ans: Estrogen and progesterone.
14. Which hormone is responsible for milk secretion in females?
Ans: Prolactin.
15. What is diabetes mellitus?
Ans: Diabetes mellitus is a disease caused by deficiency of insulin resulting in high blood sugar level.
III. Multiple Choice Questions (MCQs)
1. Endocrine glands are:
(a) Duct glands
(b) Ductless glands
(c) Sweat glands
(d) Salivary glands
Ans: (b) Ductless glands
2. The chemical messengers of the body are called:
(a) Enzymes
(b) Vitamins
(c) Hormones
(d) Pigments
Ans: (c) Hormones
3. The master gland of the body is:
(a) Thyroid
(b) Adrenal
(c) Pituitary
(d) Pancreas
Ans: (c) Pituitary
4. Thyroxine is secreted by the:
(a) Pituitary gland
(b) Thyroid gland
(c) Adrenal gland
(d) Pancreas
Ans: (b) Thyroid gland
5. The deficiency of iodine causes:
(a) Diabetes mellitus
(b) Cretinism
(c) Goitre
(d) Dwarfism
Ans: (c) Goitre
6. Insulin is secreted by the:
(a) Thyroid
(b) Pancreas
(c) Adrenal
(d) Pituitary
Ans: (b) Pancreas
7. The hormone that raises blood sugar level is:
(a) Insulin
(b) Thyroxine
(c) Glucagon
(d) Estrogen
Ans: (c) Glucagon
8. Diabetes mellitus is caused by deficiency of:
(a) Thyroxine
(b) Insulin
(c) Adrenaline
(d) Estrogen
Ans: (b) Insulin
9. The emergency hormone is:
(a) Thyroxine
(b) Insulin
(c) Adrenaline
(d) Testosterone
Ans: (c) Adrenaline
10. PTH is secreted by the:
(a) Thyroid gland
(b) Adrenal gland
(c) Parathyroid gland
(d) Pituitary gland
Ans: (c) Parathyroid gland
11. PTH regulates:
(a) Blood glucose
(b) Blood calcium
(c) Blood pressure
(d) Heartbeat
Ans: (b) Blood calcium
12. Testosterone is secreted by the:
(a) Ovary
(b) Testis
(c) Adrenal
(d) Pancreas
Ans: (b) Testis
13. Estrogen is secreted by the:
(a) Testis
(b) Kidney
(c) Ovary
(d) Thymus
Ans: (c) Ovary
14. The hormone responsible for maintenance of pregnancy is:
(a) Estrogen
(b) Progesterone
(c) Testosterone
(d) Oxytocin
Ans: (b) Progesterone
15. The gland located above the kidneys is:
(a) Pituitary
(b) Thyroid
(c) Adrenal
(d) Thymus
Ans: (c) Adrenal
16. The hormone secreted by thymus gland is:
(a) Thyroxine
(b) Thymosin
(c) Testosterone
(d) Calcitonin
Ans: (b) Thymosin
17. Thymosin helps in:
(a) Digestion
(b) Blood clotting
(c) Immunity
(d) Respiration
Ans: (c) Immunity
18. The hypothalamus is located in the:
(a) Abdomen
(b) Chest
(c) Brain
(d) Kidney
Ans: (c) Brain
19. FSH and LH are secreted by the:
(a) Thyroid
(b) Pituitary
(c) Adrenal
(d) Pancreas
Ans: (b) Pituitary
20. Calcitonin is secreted by the:
(a) Thyroid gland
(b) Pituitary gland
(c) Adrenal gland
(d) Pancreas
Ans: (a) Thyroid gland
21. The hormone responsible for growth is:
(a) Growth hormone
(b) Insulin
(c) Glucagon
(d) Thyroxine
Ans: (a) Growth hormone
22. The target gland of TSH is:
(a) Pancreas
(b) Thyroid
(c) Adrenal
(d) Testis
Ans: (b) Thyroid
23. The target gland of ACTH is:
(a) Thyroid
(b) Pancreas
(c) Adrenal cortex
(d) Ovary
Ans: (c) Adrenal cortex
24. Oxytocin is secreted from the:
(a) Pituitary gland
(b) Thyroid gland
(c) Pancreas
(d) Kidney
Ans: (a) Pituitary gland
25. Hyperglycemic hormone means a hormone that:
(a) Decreases blood sugar
(b) Increases blood sugar
(c) Decreases calcium
(d) Increases calcium
Ans: (b) Increases blood sugar
26. Hypoglycemic hormone is:
(a) Glucagon
(b) Insulin
(c) Adrenaline
(d) Thyroxine
Ans: (b) Insulin
27. The gland responsible for cretinism when deficient is:
(a) Thyroid gland
(b) Pancreas
(c) Pituitary gland
(d) Adrenal gland
Ans: (a) Thyroid gland
28. Gonadotrophic hormones act on:
(a) Kidneys
(b) Liver
(c) Gonads
(d) Heart
Ans: (c) Gonads
29. ANF is secreted by the:
(a) Kidney
(b) Atrium of heart
(c) Pituitary gland
(d) Thyroid gland
Ans: (b) Atrium of heart
30. The endocrine gland present in both males and females is:
(a) Testis
(b) Ovary
(c) Thyroid
(d) Prostate gland
Ans: (c) Thyroid.
