Please refer to Chemical Coordination and Integration Class 11 Biology Important Questions with answers below. These solved questions for Chapter 22 Chemical Coordination and Integration in NCERT Book for Class 11 Biology have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT, and KVS. Students should learn these solved problems properly as these will help them to get better marks in your class tests and examinations. You will also be able to understand how to write answers properly. Revise these questions and answers regularly. We have provided Notes for Class 11 Biology for all chapters in your textbooks.

Important Questions Class 11 Biology Chapter 22 Chemical Coordination and Integration

Objective Type Questions

Question. Diabetes insipidus is caused by hyposecretion of
(a) insulin
(b) vasopressin
(c) oxytocin
(d) thymosin

Question. Source of somatostatin is the same as that of
(a) insulin and glucagon
(b) vasopressin and oxytocin
(c) thyroxine and calcitonin
(d) somatotropin and prolactin

Question. The hormone that supports pregnancy and stimulates mammary glands for the formation of alveoli for storing milk, is secreted from
(a) anterior Pituitary
(b) posterior pituitary
(c) graafian follicle
(d) corpus luteum

Question. Hormone which helps in implantation of embryo in uterus is
(a) estrogen
(b) oxytocin
(c) relaxin
(d) progesterone

Question. Which of the following is a gastro-intestinal hormone?
(a) Cholinesterase
(b) Enterokinase
(c) Secretin
(d) Interocrinin

Question. Which hormone interacts with membrane bound receptor and does not normally enter the target cell?
(a) FSH
(b) Estrogen
(c) Thyroxine
(d) Cortisol

Question. Receptors for protein hormones are found
(a) inside nucleus
(b) inside cytoplasm
(c) on surface of ER
(d) on cell surface

Question. Steroid hormones are produced only by the
(a) adrenal medulla and pancreas.
(b) thyroid gland and pancreas.
(c) anterior and posterior pituitary.
(d) sex organs and adrenal cortex.

Assertion/Reason Type Questions

In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.

Question. Assertion : Hormone calcitonin has an antagonistic effect to that of parathormone.
Reason : Calcitonin decreases blood calcium level while parathormone increases blood calcium level.

Question. Assertion: Failure of secretion of hormone vasopressin causes diabetes mellitus in the patient.
Reason: Vasopressin increases the volume of urine by increasing the reabsorption of water from the urine.

Matching Type Questions

 Question. Select the correct match of a hormone with its source and function.

	Hormone	Source	Function
(a)	Vasopressin	Posterior pituitary	Increases loss of water through urine.
(b)	Nor-epinephrine	Adrenal  medulla	Increases heart beat, rate of respiration and alertness.
(c)	Glucagon	Beta-cells of Islets of langerhans	Stimulates  glycogenolysis.
(d)	Prolactin	Posterior Pituitary	Regulates growth of  mammary glands and milk formation in females.

Question. Match the hormones given in column-I with the terms given in column-II.

Column -I	Column-II
A. ADH	I. Pituitary
B. ACTH	II. Mineralocorticoid
C. Aldosterone	III. Diabetes mellitus
D. Insulin	IV. Diabetes insipidus
E. Adrenaline	V. Vasodilator

(a) A – I, B – IV, C – II, D – III, E – V
(b) A – IV, B – II, C – I, D – III, E – V
(c) A – IV, B – I, C – II, D – III, E – V
(d) A – IV, B – I, C – III, D – II, E – V

Question. Match the hormone given in column-I with their function in given in column-II.

Column-I	Column-II
A. FSH	I. Prepare endometrium for implantation
B. LH	II. Develops female secondary sexual characters
C. Progesterone	III. Contraction of uterine wall
D. Estrogen	IV. Development of corpus luteum
	V. Maturation of Graafian follicle

(a) A – V, B – IV, C – I, D – II
(b) A – IV, B – V, C – II, D – I
(c) A – IV, B – III, C – II, D – V
(d) A – V, B – I, C – II, D – IV

Question. Match the endocrine gland as a source with its respective hormone as well as the function.

	Source gland	Hormone	Function
(a)	Thyroid	Thyroxine	Regulates blood calcium level
(b)	Anterior pituitary	Oxytocin	Contraction of uterine muscles during child birth
(c)	Posterior pituitary	Vasopressin	Stimulates resorption of water in the distal tubules in the nephron
(d)	Corpus luteum	Estrogen	Supports pregnancy

Question. Mark the hormone given in column I and the endocrine cells given in column II.

Column-I	Column-II
A. a-cell	I. Inhibin
B. b-cell	II. Glucagon
C. Leydig cell	III. Insulin
D. Sertoli cells	IV. Testosterone

(a) A – I, B – III, C – IV, D – II
(b) A – III, B – II, C – IV, D – I
(c) A – I, B – III, C – II, D – IV
(d) A – II, B – III, C – IV, D – I

Critical Thinking Type Questions

Question. Low level of progesterone and estrogen in blood stimulate
(a) FSH-RH production
(b) LH production
(c) GH production
(d) All of the above

Question. Which hormone causes dilation of blood vessels, increased oxygen consumption and glucogenesis?
(a) Insulin
(b) Adrenaline
(c) Glucagon
(d) ACTH

Question. ADH, responsible for reabsorption of water and reduction of urine secretion, is synthesized by
(a) posterior pituitary gland
(b) juxtaglomerular apparatus
(c) hypothalamus
(d) anterior pituitary gland

Question. Hypothyroidism in adults and hyperparathyroidism in children will respectively lead to
(a) myxoedema and cretinism
(b) Grave’s disease and Hashimoto’s disease
(c) myxoedema and osteitis fibrosa cystica
(d) Addison’a disease and cretinism

Question. A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
(a) Thyroid
(b) Parathyroid
(c) Parotid
(d) Pancreas

Question. A health disorder that results from the deficiency of thyroxine in adults and characterized by a low metabolicrate, increase in body weight and tendency to retain water in tissues is
(a) cretinism
(b) hypothyroidism
(c) simple goitre
(d) myxoedema

Question. STH or growth hormone (A) differs from insulin (B) in which of the following action ?
(a) (A) causes glycogenesis but (B) causes glycolysis.
(b) (A) causes lipolysis but (B) causes lipogenesis.
(c) (A) is catabolic for protein but (B) is anabolic.
(d) (A) causes glycogenolysis but (B) causes glycogenesis.

Question. The hormone ANP (Atrial Natriuretic Peptide)
(a) stimulates the secretion of ADH and aldosterone.
(b) inhibits the secretion of aldosterone but stimulates ADH secretion.
(c) stimulates the secretion of renin.
(d) inhibits the secretion of ADH, aldosterone and renin.

Question. Tim once suffered a severe allergic reaction to a bee sting.
The sting caused him to suffer a near-fatal drop in blood pressure called anaphylactic shock. Now he carries a kit containing a syringe of _____________, which he can inject to speed up his heart if he reacts to a bee sting.
(a) insulin
(b) melatonin
(c) testosterone
(d) epinephrine