NCERT CLASS 11 | TOPIC : CHEMICAL CO-ORDINATION AND INTEGRATION | QB-2 | NEET BIOLOGY ONLINE TEST

---

---

NCERT CLASS 11 | TOPIC : CHEMICAL CO-ORDINATION AND INTEGRATION | QB-2 | NEET BIOLOGY ONLINE TEST

---

It contains 95 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

---

1 ➤ 101. ANF leads to

(a) Dilation of blood vessels (b) ↓es blood pressure (c) Both (a) and (b) (d) ↑es blood pressure

2 ➤ 102. Match the column: Column I (Production Site) Column II (Hormones)

---

A. Atrial wall – 1. ANF

---

B. Thyroid gland – 2. PTH

---

C. Parathyroid – 3. T3,T4, TCT

---

D. GIT – 4. CCK, GIP, gastrin and secretin

---

(a) A–2, B–4, C–1, D–3 (b) A–1, B–3, C–2, D–4 (c) A–4, B–2, C–3, D–1 (d) A–4, B–3, C–2, D–1

3 ➤ 103. Match the Column: Hormone & Function

---

A. Gastrin – 1. Act on exocrine pancreas and stimulates the secretion of water and bicarbonate ion

---

B. Secretin – 2. Action both pancrease and gall bladder and stimulates secretion of pancreatic enzyme and bile juice respectively.

---

C. CCK (Cholesystokinin) – 3. Acts on gastric gland and stimulates the secretion of HCl and pepsinogen.

---

D. GIP (Gastric Inhibitory Peptide) – 4. Inhibits gastric secretion and motility.

---

(a) A–3, B–1, C–2, D–4 (b) A–1, B–3, C–4, D–2 (c) A–1, B–2, C–3, D–4 (d) A–4, B–3, C–1, D–2

4 ➤ 104. The _________ of kidney produces peptide hormone called _________ which stimulate erythropoiesis.

(a) Podocyte, Erythropoietin (b) JG cells, Erythropoietin (c) JG cells, Rennin (d) JG cells, Renin

5 ➤ 105. Select the incorrect statement:

(a) GIT secretes four major peptide hormones. (b) Several other non-endocrine tissues secrete hormones called growth factors. (c) Hormone receptors are located in target tissues only. (d) Hormone receptors are non-specific in nature.

6 ➤ 106. By which organ the hormones are secreted which are non endocrine gland?

(a) Heart (b) Kidney (c) GIT (d) All of these

7 ➤ 107. Select the incorrect matching: Hormone / target organ

(a) Secretin pancreas (b) CCK pancreas and Gallbladder (c) ANF atrial wall (d) Gastrin gastric glands

8 ➤ 108. Match the source gland with its respective hormone as well as the function.

---

---

A) B) C) D)

9 ➤ 109. Select the total number of peptide hormones from the following: Erythropoietin, Gastrin, Secretin, GIP, CCK, Insulin, Glucagon, Thymosin, PTH, ANF

(a) 8 (b) 7 (c) 9 (d) 10

10 ➤ 110. Match the Column I with Column II:

---

A. Peptide, polypeptide protein hormones – 1. Epinephrine

---

B. Steroid – 2. T3 and T4 (thyroid hormones)

---

C. Iodothyronines – 3. Cortisol, testosterone, estradiol,progesterone, aldosterone

---

D. Amino acid derivatives – 4. Pituitary hormones, pancreatic hormones, hypothalamic hormone

---

(a) A–1, B–2, C–3, D–4 (b) A–4, B–3, C–2, D–1 (c) A–4, B–3, C–1, D–2 (d) A–1, B–4, C–3, D–2

11 ➤ 111. A steroid hormone typically alters the activity of its target cells by

(a) Changing membrane permeability of cells (b) Entering the cell and altering gene expression (c) Activation of IP3 (d) Conversion of ATP to cAMP

12 ➤ 112. Hormone receptors are located in target tissue only. Their position is

(a) In plasma membrane (b) In cytoplasm (c) In nucleus (d) Any of the above depending on type of hormone

13 ➤ 113. Find out the correct statement from the following:

---

1) Hormones interact with membrane bound receptors normally do not enter the target cells.

---

2) Iodothyronines have membrane bound receptors.

---

3) Hormones which interact with intracellular receptors mostly regulate gene expression.

---

4) Steroid hormones generate second messengers.

---

(a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 2 and 4 only

14 ➤ 114. Identify A, B, C and D in the given figure.

---

---

(a) A–Physiological response, B–Proteins, C–Receptor-hormone complex, D–Uterine cell membrane (b) A–Receptor-hormone complex, B–Proteins, C–Uterine cell membrane, D–Physiological response (c) A–Uterine cell membrane, B–Receptor-hormone complex, C–Proteins, D–Physiological response (d) A–Proteins, B–Uterine cell membrane, C–Physiological response, D–Receptor-hormone complex

15 ➤ 115. Find the total no. of hormones from the following which binds to intracellular receptors.

---

Cortisol, Testosterone, T3, Glucagon, Oxytocin, FSH, Progesterone, ICSH, Oestrogen, GH

---

(a) 4 (b) 5 (c) 6 (d) 7

16 ➤ 116. Which of the following act as secondary messenger?

(a) Ca2+ (b) IP3 (c) cAMP (d) All 2Ca 3IP

17 ➤ 117. Following hormones are iodothyronines

(a) T3 (b) T4 (c) TCT (d) Both (a) and (b)

18 ➤ 118. Which is steroid hormone?

(a) GH (b) Insulin (c) Aldosterone (d) Epinephrine

19 ➤ 119. Which of the following hormones do not act by a second messenger system?

(a) GH (b) Epinephrine (c) ICSH (d) Oestrogen

20 ➤ 120. Chemically epinephrine is

(a) Amino acid derivative (b) Peptide hormone (c) Steroid hormone (d) Iodothyronines

21 ➤ 121. Which hormone receptors are present in cytoplasm of target cell?

(a) Thyroxin (b) Oestrogen (c) Insulin (d) All

22 ➤ 122. Arrange in sequence, working of ‘FSH’?

---

(1) Binding to membrane receptor

---

(2) Biochemical response

---

(3) Generation of second messenger

---

(4) Physiological response (ev. Ovarian growth)

---

(a) 1 → 2 → 3 → 4 (b) 1 → 3 → 2 → 4 (c) 4 → 3 → 2 → 1 (d) 3 → 1 → 4 → 2

23 ➤ 123. Which hormone directly affect transcription by acting on gene?

(a) FSH (b) GH (c) Oestrogen (d) CCK

24 ➤ 124. Following hormones responsible for maintenance of blood pressure.

(a) Aldosterone (b) Renin (c) ANF (d) All

25 ➤ 125. Assertion: Aldosterone increases the volume of blood and other extracellular fluids.

---

Reason: The secretion of aldosterone is stimulated by a fall in the circulating volume of blood.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

26 ➤ 126. Assertion: FSH is also known as interstitial cell stimulating hormone.

---

Reason: It is because of the fact that FSH stimulates the interstitial cells of testis.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

27 ➤ 127. Assertion: Oxytocin is also known as Antidiuretic Hormone (ADH).

---

Reason: Oxytocin can cause an increase in the renal reabsorption of water.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

28 ➤ 128. Assertion: Failure of secretion of thyroid gland hormones from childhood causes cretinism disease.

---

Reason: Thyrotropin hormone maintains BMR and promotes the growth of body tissues.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

29 ➤ 129. Assertion: Hormones are similar to enzymes in their action and chemical nature.

---

Reason: Hormones and enzymes are proteinaceous in nature and acts as informational molecules.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

30 ➤ 130. Assertion: Glucagon is said to lower down the blood sugar level.

---

Reason: Glucagon increases the utilization of glucose in the tissue and the synthesis of liver glycogen.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

31 ➤ 131. Assertion: Prolactin is also called the ‘Milk ejection hormone’.

---

Reason: Prolactin stimulates the smooth muscle contractions of the mammary glands.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

32 ➤ 132. Assertion: A tumor of adrenal cortex may cause addison’s disease.

---

Reason: This happens due to over secretion of cortisol by the tumour.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

33 ➤ 133. Assertion: Neurohypophysis(Pars nervosa) is also known as posterior pitutary.

---

Reason: Posterior pitutary stores and releases two hormones called oxytocin and vasopressin.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

34 ➤ 134. Assertion: Vasopressin is also known as antidiueretic hormone.

---

Reason: Vasopressin stimulates the reabsorption of water and electrolyte by distal tubules and there by reduces diuresis.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

35 ➤ 135. Assertion: Enlargement of thyroid gland is known as goitre.

---

Reason: Goitre occurs due to the deficiency of iodine only.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

36 ➤ 136. Assertion: Immune response of old person becomes weak.

---

Reason: Thymus is degenerated in old individuals.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

37 ➤ 137. Assertion: Adrenal cortex can be removed without causing death.

---

Reason: Adrenal cortex is not vital for survival.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

38 ➤ 138. Assertion: Failure of secretion of somatotropin from an early age causes dwarfism in the patient.

---

Reason: Somatotropin hormone stimulates the body growth and elongation of long bones.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

39 ➤ 139. Assertion: Thyroxine is lipid soluble hormone.

---

Reason: Receptor for thyroxine is situated in cytoplasm.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

40 ➤ 140. Assertion: Hormones are nutrient substances which act as intercellular messengers.

---

Reason: Hormones are produced in large amount.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

41 ➤ 141. Assertion: The posterior pituitary is under the direct neural regulation of the hypothalamus.

---

Reason: Hypothalamic Neuron via axon sent their secretion to posterior pituitary for release.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

42 ➤ 142. Assertion: Over secretion of GH leads to gigantism.

---

Reason: It leads to abnormal growing body.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

43 ➤ 143. Assertion: Thyroid gland use to regulate blood calcium level.

---

Reason: Thyroid gland use to secret protein hormone called thyrocalcitonin which affects blood calcium level.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

44 ➤ 144. Assertion: MSH regulates pigmentation of skin.

---

Reason: MSH acts on melanin containing cells.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

45 ➤ 145. Assertion: Oxytocin is called ‘birth hormone’.

---

Reason: In female it stimulates a vigorous contraction of smooth muscle of uterus at the time of child birth.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

46 ➤ 146. Assertion: Polycythemia is common in hyperthyroidism

---

Reason: Thyroid hormone accelerate the process of red blood cell formation

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

47 ➤ 147. Assertion: PTH increases the Ca2+ level in blood

---

Reason: PTH stimulates the process of bone resorption.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

48 ➤ 148. Assertion: PTH and thyrocalcitonin have antagonistic effect

---

Reason: PTH increases where as thyrocalcitonin decreases blood

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

49 ➤ 149. Assertion: Catecholamine increases the concentration of glucose in blood

---

Reason: Catecholamine stimulates glycogenolysis

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

50 ➤ 150. Assertion: Cortisol is useful in organ transplantation

---

Reason: Cortisol suppresses immune response

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

51 ➤ 151. Assertion: Glucagon is a hypoglycaemic hormone

---

Reason: Glucagon stimulates glycogenesis

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

52 ➤ 152. Assertion: Androgen affects male sexual behaviour (Libido)

---

Reason: Oestrogen regulates female sexual behaviour

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

53 ➤ 153. Assertion: Secretin act on endocrine part of pancreas.

---

Reason: Secretin stimulates secretion of insulin.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

54 ➤ 154. Assertion: CCK stimulates secretion of bile juice.

---

Reason: CCK act on liver.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

55 ➤ 1. Select the correct matching of a hormone, its source and function.[AIPMT MAINS 2010]

---

---

A) B) C) D)

56 ➤ 2. Injury to adrenal cortex is not likely to affect the secretion of which one of the following? [AIPMT PRE 2010]

(a) Aldosterone (b) Both androstenedione and dehydroepiandrosterone (c) Adrenaline (d) Cortisol

57 ➤ 3. Low Ca2+ in the body fluid may be the cause of [AIPMT PRE 2010]

(a) Tetany (b) Anaemia (c) Angina pectoris (d) Gout

58 ➤ 4. Which one of the following pairs is incorrectly matched? [AIPMT PRE 2010]

(a) Glucagon − Beta cells (source) (a) Somatostatin − Delta cells (source) (b) Corpus luteum − Relaxin (secretion) (c) Insulin − Diabetes mellitus (disease)

59 ➤ 5. The toxic agents present in food which interfere with thyroxin synthesis lead to the development of [AIPMT PRE 2010]

(a) Toxic goitre (b) Cretinism (c) Simple goitre (d) Thyrotoxicosis

60 ➤ 6. Match the source gland with its respective hormone as well as the function. [AIPMT PRE 2011]

---

---

A) B) C) D)

61 ➤ 7. Given ahead is an incomplete table about certain hormones, their source glands and one major effect of each in the human body. Identify the correct option for the three blanks A, B and C.

---

---

A) B) C) D)

62 ➤ 8. The 24 hours (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone [AIPMT MAINS 2011]

(a) Calcitonin (b) Prolactin (c) Adrenaline (d) Melatonin

63 ➤ 9. The Leydig cells which are found in the human body are the secretory source of [AIPMT PRE 2012]

(a) Progesterone (b) Intestinal mucus (c) Glucagon (d) Androgens

64 ➤ 10. Which one of the following pairs of hormones are the examples of those that can easily pass through cell membrane and the target cell and binds to a receptor inside it (mostly in the nucleus)? [AIPMT PRE 2012]

(a) Insulin, glucagon (b) Thyroxin, insulin (c) Somatostatin, oxytocin (d) Cortisol, testosterone

65 ➤ 11. What is correct to say about the hormone action in humans? [AIPMT PRE 2012]

(a) Glucagon is secreted by b-cells of islets of Langerhans and stimulates glycogenolysis. (b) Secretion of thymosins is stimulated with aging. (c) In females, FSH first binds with specific receptors on ovarian cell membrane. (d) FHS stimulates the secretion of oestrogen and progesterone.

66 ➤ 12. Which of the following statements is correct in relation to the endocrine system? [AIPMT 2013]

(a) Adenopophysis is under direct neural regulation of the hypothalamus. (b) Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones. (c) Non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones. (d) Releasing and inhibitory hormones are produced by the pituitary gland

67 ➤ 13. A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. [AIPMT 2013]

(a) Deficiency of iodine in diet (b) Low secretion of growth hormone (c) Cancer of the thyroid gland (d) Over secretion of pars distalis

68 ➤ 14. Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom. (A: Endocrine gland, B: Hormone, C: Function/deficiency symptoms)

---

---

A) B) C) D)

69 ➤ 15. Identify the hormone with its correct matching of source and function: [AIPMT 2014]

(a) Oxytocin – Posterior pituitary, growth and maintenance of mammary glands (b) Melatonin – Pineal gland, regulates the normal rhythm of sleepwake cycle (c) Progesterone – Corpus luteum, stimulation of growth and activities of female secondary sex organs (d) Atrial natriuretic factor – Ventricular wall increases the blood pressure.

70 ➤ 16. Fight-or-flight reactions can cause the activation of [AIPMT 2014, RE-AIPMT 2015]

(a) The parathyroid glands, leading to increased metabolic rate. (b) The kidney, leading to suppression of rennin-angiotensin-aldosterone pathway. (c) The adrenal medulla, leading to increased secretion of epinephrine and norepinephrine. (d) The pancreas leading to a reduction in the blood sugar levels.

71 ➤ 17. Which one of the following hormones is not involved in sugar metabolism? [AIPMT 2015, RE-AIPMT 2015]

(a) Aldosterone (b) Insulin (c) Glucagon (d) Cortisone

72 ➤ 18. A chemical signal that has both endocrine and neural roles is [AIPMT 2015]

(a) Melatonin (b) Calcitonin (c) Epinephrine (d) Cortisol

73 ➤ 19. Which one of the following hormones though synthesized elsewhere, is stored and released by the master gland? [RE-AIPMT 2015]

(a) Luteinizing hormone (b) Prolactin (c) Melanocyte stimulating hormone (d) Antidiuretic hormone

74 ➤ 20. Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other? [NEET - I, 2016]

(a) Parathormone–Calcitonin (b) Insulin–Glucagon (c) Aldosterone–Atrial Natriuretic Factor (d) Relaxin–Inhibin

75 ➤ 21. Changes in GnRH pulse frequency in females is controlled by circulating levels of : [NEET - I, 2016]

(a) Estrogen and progesterone (b) Estrogen and inhibin (c) Progesterone only (d) Progesterone and inhibin

76 ➤ 22. Identify the correct statement on ‘inhibin’: [NEET - I, 2016]

(a) Inhibits the secretion of LH, FSH and Prolactin (b) Is produced by granulose cells in ovary and inhibits the secretion of FSH (c) Is produced by granulose cells in ovary and inhibits the secretion of LH (d) Is produced by nurse cells in testes and inhibits the secretion of LH

77 ➤ 23. Graves’ disease is caused due to [NEET - II, 2016]

(a) Hypersecretion of thyroid gland (b) Hyporsecretion of adrenal gland (c) Hypersecretion of adrenal gland (d) Hyporsecretion of thyroid gland

78 ➤ 24. Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilization. [NEET - II, 2016]

(a) Glucagon (b) Secretion (c) Gastrin (d) Insulin

79 ➤ 25. Osteoporosis, an age-related disease of skeletal system, may occur due to [NEET - II, 2016]

(a) High concentration of Ca++ and Na+ (b) Decreased level of estrogen (c) Accumulation of uric acid leading to inflammation of joints (d) Immune disorder affecting neuromuscular junction leading to fatigue

80 ➤ 26. The posterior pituitary gland is not a ‘true’ endocrine gland because [NEET - II, 2016]

(a) It only stores and releases hormones (b) It is under the regulation of hypothalamus (c) It secretes enzymes (d) It is provided with a duct

81 ➤ 1. Select the right match of endocrine gland and their hormones among the options given below:

---

A. Pineal i. Epinephrine

---

B. Thyroid ii. Melatonin

---

C. Ovary iii. Oestrogen

---

D. Adrenal medulla iv. Tetraiodothyronine

---

(a) A – iv, B – ii, C – iii, D – i (b) A – ii, B – iv, C – i, D – iii (c) A – iv, B – ii, C – i, D – iii (d) A – ii, B – iv, C – iii, D – i

82 ➤ 2. Listed below are the hormones of anterior pituitary origin. Tick the wrong entry

(a) Growth hormone (b) Follicle stimulating hormone (c) Oxytocin (d) Adrenocorticotropic hormone

83 ➤ 3. Mary is about to face an interview. But during the first five minutes before the interview she experiences sweating, increased rate of heart beat, respiration, etc. Which hormone is responsible for her restlessness?

(a) Oestrogen and progesterone (b) Oxytocin and vasopressin (c) Adrenaline and noradrenaline (d) Insulin and glucagon

84 ➤ 4. The steroid responsible for the balance of water and electrolytes in our body is

(a) Insulin (b) Melatonin (c) Testosterone (d) Aldosterone

85 ➤ 5. Thymosin is responsible for

(a) Raising the blood sugar level (b) Raising blood calcium level (c) Increased production of T-Iymphocytes (d) Decrease in blood RBC

86 ➤ 6. In the mechanism of action of a protein hormone, one of the second messengers is

(a) Cyclic AMP (b) Insulin (c) T3 (d) Gastrin

87 ➤ 7. Leydig cells produce a group of hormones called

(a) Androgens (b) Oestrogens (c) Aldosterone (d) Gonadotropins

88 ➤ 8. Corpus luteum secretes a hormone called

(a) Prolactin (b) Progesterone (c) Aldosterone (d) Testosterone

89 ➤ 9. Cortisol is secreted from

(a) Pancreas (b) Thyroid (c) Adrenal (d) Thymus

90 ➤ 10. A hormone responsible for normal sleep-wake cycle is

(a) Epinephrine (b) Gastrin (c) Melatonin (d) Insulin

91 ➤ 11. Hormones are called chemical signals that stimulate specific target tissues. Their specificity is due to the presence of signal receiving ‘receptors’ only in the respective target tissues. Where are these receptors present in case of hormones of protein nature?

(a) Extracellular matrix (b) Blood (c) Plasma membrane (d) Nucleus

92 ➤ 12. Choose the correct answer among the following options:

---

(A) Epinephrine (i) Increase in muscle growth

---

(B) Testosterone (ii) Decrease in blood pressure

---

(C) Glucagon (iii) Decrease in liver glycogen content

---

(D) Atrial natriuretic factor (iv) Increased heart beat

---

(a) A – ii, B – i, C – iii, D – iv (b) A – iv, B – i, C – iii, D – ii (c) A – i, B – ii, C – iii, D – iv (d) A – i, B – iv, C – ii, D – iii.

93 ➤ 13. Blood calcium level is a resultant of how much dietary calcium is absorbed, how much calcium is lost in the urine, how much bone dissolves releasing calcium into the blood and how much calcium from blood enters tissues. A number of factors play an important role in these processes. Mark the one which has no role

(a) Vitamin D (b) Parathyroid hormone (c) Thyrocalcitonin (d) Thymosin

94 ➤ 14. All the following tissues in mammals except one consist of a central ‘medullary’ region surrounded by a cortical region. Mark the wrong entry.

(a) Ovary (b) Adrenal (c) Liver (d) Kidney

95 ➤ 15. Which one of the following conditions is not linked to deficiency of thyroid hormones?

(a) Cretinism (b) Goitre (c) Myxedema (d) Exophthalmia

Your Score is

---

Share: