Take 5 chapter-wise practice tests plus 1 full module test on Chemical Coordination and Integration for NEET with +4/-1 scoring, answer review, and concise explanations.
Attempt 5 focused chapter practice tests and 1 module test with reframed NEET-style endocrine questions built from readable zoology module material.
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1. Hormones are chemical messengers secreted by:
Explanation: Endocrine glands release hormones directly into blood.
2. Endocrine glands are called ductless because they:
Explanation: Hormones are delivered through circulation instead of ducts.
3. A hormone usually acts on a:
Explanation: Hormonal action depends on receptors in target tissues.
4. Which statement distinguishes endocrine from exocrine glands?
Explanation: Exocrine glands use ducts, while endocrine glands release into circulation.
5. Hormonal action is generally slower than neural action because:
Explanation: Hormonal signalling is chemical and usually slower but often longer lasting.
6. Many endocrine glands are regulated by:
Explanation: Negative feedback maintains hormonal balance.
7. The region linking nervous and endocrine control most directly is:
Explanation: Hypothalamus controls pituitary and integrates neural and endocrine regulation.
8. Which one is an endocrine gland?
Explanation: Pituitary is a classic endocrine gland.
9. Which one is not primarily an endocrine gland?
Explanation: Sweat glands are exocrine and secrete through ducts.
10. A hormone can act only where suitable:
Explanation: Target specificity depends on receptor presence.
11. The master endocrine gland is commonly called:
Explanation: Pituitary influences several other endocrine glands.
12. Which pair is correctly matched?
Explanation: Endocrine glands are ductless and secrete into blood.
13. Which statement is correct?
Explanation: This is a major comparison between nervous and endocrine coordination.
14. Some organs act as endocrine tissues in addition to other roles. One example is:
Explanation: Pancreas has both exocrine and endocrine functions.
15. Hormones are important for maintaining:
Explanation: They help regulate metabolism, growth, osmotic balance, glucose level, and more.
16. Hormones travel to target organs mainly through:
Explanation: Circulation distributes hormones to distant targets.
17. The endocrine system coordinates body functions mainly by:
Explanation: Hormones are chemical regulators.
18. Which statement is not correct?
Explanation: Neural-endocrine coordination is common, especially via hypothalamus.
19. Which one belongs to endocrine system?
Explanation: Adrenals are endocrine glands located above kidneys.
20. The best summary is:
Explanation: This captures the core logic of endocrine regulation.
21. Revision Booster 1. Recheck this Chemical Coordination and Integration concept with a fresh option order. Hormones are chemical messengers secreted by:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Endocrine glands release hormones directly into blood.
22. Revision Booster 2. Recheck this Chemical Coordination and Integration concept with a fresh option order. Endocrine glands are called ductless because they:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Hormones are delivered through circulation instead of ducts.
23. Revision Booster 3. Recheck this Chemical Coordination and Integration concept with a fresh option order. A hormone usually acts on a:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Hormonal action depends on receptors in target tissues.
24. Revision Booster 4. Recheck this Chemical Coordination and Integration concept with a fresh option order. Which statement distinguishes endocrine from exocrine glands?
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Exocrine glands use ducts, while endocrine glands release into circulation.
25. Revision Booster 5. Recheck this Chemical Coordination and Integration concept with a fresh option order. Hormonal action is generally slower than neural action because:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Hormonal signalling is chemical and usually slower but often longer lasting.
26. Pituitary gland lies at the base of:
Explanation: Pituitary is attached to hypothalamus below the brain.
27. The anterior pituitary is also called:
Explanation: Adenohypophysis is the glandular anterior lobe.
28. The posterior pituitary is called:
Explanation: Posterior pituitary stores and releases neurohormones from hypothalamus.
29. Growth hormone is secreted by:
Explanation: GH is produced by adenohypophysis.
30. Excess growth hormone in childhood causes:
Explanation: Excess GH before epiphyseal closure results in abnormal height increase.
31. Deficiency of growth hormone in childhood can cause:
Explanation: Low GH during growth years reduces body growth.
32. Excess GH in adults commonly produces:
Explanation: After epiphyseal closure, excess GH enlarges extremities and facial bones.
33. Thyroid-stimulating hormone acts on:
Explanation: TSH stimulates thyroid hormone synthesis and release.
34. ACTH stimulates:
Explanation: ACTH promotes secretion from adrenal cortex.
35. FSH and LH are secreted by:
Explanation: These gonadotropins regulate gonadal activity.
36. Prolactin mainly helps in:
Explanation: Prolactin stimulates mammary glands for lactation.
37. Posterior pituitary stores and releases:
Explanation: These hormones are produced in hypothalamus and released through posterior pituitary.
38. ADH mainly helps in:
Explanation: ADH conserves water and reduces urine output.
39. Deficiency of ADH may lead to:
Explanation: Low ADH causes excessive urine loss and thirst.
40. Oxytocin is important in:
Explanation: Oxytocin supports childbirth and let-down reflex.
41. Thyroid gland is located:
Explanation: The bilobed thyroid surrounds the trachea in the neck.
42. Main thyroid hormones are:
Explanation: Triiodothyronine and thyroxine are thyroid hormones.
43. Iodine is essential for synthesis of:
Explanation: Thyroid hormones contain iodine in their structure.
44. Iodine deficiency commonly leads to:
Explanation: Thyroid enlargement often results from iodine deficiency.
45. Parathyroid hormone mainly increases blood calcium by:
Explanation: PTH raises blood calcium through bone, kidney, and vitamin D-related actions.
46. Revision Booster 1. Recheck this Chemical Coordination and Integration concept with a fresh option order. Pituitary gland lies at the base of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Pituitary is attached to hypothalamus below the brain.
47. Revision Booster 2. Recheck this Chemical Coordination and Integration concept with a fresh option order. The anterior pituitary is also called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Adenohypophysis is the glandular anterior lobe.
48. Revision Booster 3. Recheck this Chemical Coordination and Integration concept with a fresh option order. The posterior pituitary is called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Posterior pituitary stores and releases neurohormones from hypothalamus.
49. Revision Booster 4. Recheck this Chemical Coordination and Integration concept with a fresh option order. Growth hormone is secreted by:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. GH is produced by adenohypophysis.
50. Revision Booster 5. Recheck this Chemical Coordination and Integration concept with a fresh option order. Excess growth hormone in childhood causes:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Excess GH before epiphyseal closure results in abnormal height increase.
51. The endocrine portion of pancreas consists of:
Explanation: These islets secrete pancreatic hormones.
52. Insulin is secreted by:
Explanation: Beta cells of islets release insulin.
53. Glucagon is secreted by:
Explanation: Alpha cells of islets release glucagon.
54. The major action of insulin is to:
Explanation: Insulin promotes glucose uptake and storage.
55. Glucagon mainly acts to:
Explanation: Glucagon mobilizes stored glucose and increases blood sugar.
56. Diabetes mellitus results mainly from deficiency or ineffective action of:
Explanation: Insulin deficiency or resistance causes hyperglycemia.
57. Adrenal glands are situated:
Explanation: Adrenals are paired endocrine glands above kidneys.
58. Adrenal gland has outer cortex and inner:
Explanation: Adrenal medulla lies centrally within the gland.
59. Adrenal cortex secretes mainly:
Explanation: Cortical hormones include mineralocorticoids and glucocorticoids.
60. Aldosterone helps regulate:
Explanation: Aldosterone promotes sodium reabsorption and potassium excretion.
61. Cortisol is categorized as a:
Explanation: Cortisol regulates metabolism and stress responses.
62. Adrenal medulla secretes:
Explanation: These catecholamines help fight-or-flight responses.
63. Adrenaline generally causes:
Explanation: Adrenaline prepares the body for emergency action.
64. Hyposecretion of adrenal cortex hormones can cause:
Explanation: Addison's disease is associated with adrenal cortical insufficiency.
65. Hypersecretion of adrenal cortex hormones may lead to:
Explanation: Excess glucocorticoid effect produces Cushingoid symptoms.
66. Which pair is correctly matched?
Explanation: The other pairs mismatch hormone source and gland.
67. Which hormones act antagonistically in glucose homeostasis?
Explanation: Insulin lowers and glucagon raises blood glucose.
68. Adrenal medullary hormones are chemically grouped as:
Explanation: Adrenaline and noradrenaline are catecholamines.
69. Which statement is correct?
Explanation: Their hormones and roles are distinct.
70. The best summary is:
Explanation: This captures the main endocrine significance of these glands.
71. Revision Booster 1. Recheck this Chemical Coordination and Integration concept with a fresh option order. The endocrine portion of pancreas consists of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. These islets secrete pancreatic hormones.
72. Revision Booster 2. Recheck this Chemical Coordination and Integration concept with a fresh option order. Insulin is secreted by:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Beta cells of islets release insulin.
73. Revision Booster 3. Recheck this Chemical Coordination and Integration concept with a fresh option order. Glucagon is secreted by:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Alpha cells of islets release glucagon.
74. Revision Booster 4. Recheck this Chemical Coordination and Integration concept with a fresh option order. The major action of insulin is to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Insulin promotes glucose uptake and storage.
75. Revision Booster 5. Recheck this Chemical Coordination and Integration concept with a fresh option order. Glucagon mainly acts to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Glucagon mobilizes stored glucose and increases blood sugar.
76. Testes secrete the major male hormone:
Explanation: Testosterone supports male secondary sexual characters and spermatogenesis.
77. Ovaries secrete mainly:
Explanation: These ovarian hormones regulate reproductive cycle and female characters.
78. Pineal gland secretes:
Explanation: Melatonin helps regulate biological rhythms.
79. Melatonin is associated most closely with regulation of:
Explanation: Pineal hormone influences sleep-wake cycles.
80. Thymus is important particularly for:
Explanation: Thymus supports maturation of T-lymphocyte-related immunity.
81. Parathyroid hormone mainly raises:
Explanation: PTH is a chief regulator of calcium homeostasis.
82. Calcitonin helps by generally:
Explanation: Calcitonin opposes PTH in calcium balance.
83. During pregnancy, placenta acts as an endocrine tissue producing hormones such as:
Explanation: Placenta produces several hormones, including hCG, progesterone, estrogens, and hPL.
84. Some tissues produce hormones in addition to classic glands. One example is:
Explanation: Certain organs like heart, GI tract, and kidney can produce hormones or hormone-like factors.
85. Gonadal hormones often exert feedback on:
Explanation: This endocrine axis is regulated by feedback loops.
86. Progesterone is especially important for:
Explanation: Progesterone supports secretory endometrium and pregnancy.
87. Oestrogen is important in development of:
Explanation: It also supports reproductive tract growth and cycle regulation.
88. Testosterone helps in:
Explanation: It is the major androgen from testes.
89. Thymosin from thymus is related mainly to:
Explanation: Thymic hormones support T-cell differentiation.
90. A major antagonistic pair in calcium homeostasis is:
Explanation: These hormones act in opposite directions on blood calcium.
91. Reduced light exposure tends to increase secretion of:
Explanation: Pineal secretion is linked to light-dark cycles.
92. Which pair is correctly matched?
Explanation: The remaining pairs mismatch gland and hormone.
93. Which statement is correct?
Explanation: Feedback is central to endocrine balance.
94. The endocrine role of gonads shows that reproduction is linked to:
Explanation: Reproductive organs also contribute hormones that coordinate body functions.
95. The best summary is:
Explanation: These glands enrich the full endocrine coordination picture.
96. Revision Booster 1. Recheck this Chemical Coordination and Integration concept with a fresh option order. Testes secrete the major male hormone:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Testosterone supports male secondary sexual characters and spermatogenesis.
97. Revision Booster 2. Recheck this Chemical Coordination and Integration concept with a fresh option order. Ovaries secrete mainly:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. These ovarian hormones regulate reproductive cycle and female characters.
98. Revision Booster 3. Recheck this Chemical Coordination and Integration concept with a fresh option order. Pineal gland secretes:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Melatonin helps regulate biological rhythms.
99. Revision Booster 4. Recheck this Chemical Coordination and Integration concept with a fresh option order. Melatonin is associated most closely with regulation of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Pineal hormone influences sleep-wake cycles.
100. Revision Booster 5. Recheck this Chemical Coordination and Integration concept with a fresh option order. Thymus is important particularly for:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Thymus supports maturation of T-lymphocyte-related immunity.
101. Hypothyroidism in children can lead to:
Explanation: Severe thyroid deficiency during development causes cretinism.
102. Adult hypothyroidism with low metabolic rate and puffiness is commonly linked with:
Explanation: Myxoedema is a classical adult hypothyroid condition.
103. Excess thyroid hormone generally causes:
Explanation: Hyperthyroidism raises basal metabolic rate.
104. A classic sign of diabetes mellitus is:
Explanation: Reduced insulin action results in elevated blood sugar.
105. Tetany can occur due to low blood calcium often linked with hyposecretion of:
Explanation: Low PTH can reduce blood calcium and cause neuromuscular irritability.
106. Excess GH before puberty causes:
Explanation: This distinction depends on timing relative to epiphyseal closure.
107. Excess GH after puberty causes:
Explanation: After long bones stop elongating, excess GH enlarges extremities and facial bones.
108. Low adrenal cortical secretion is characteristic of:
Explanation: Addison's disease involves adrenal hypofunction.
109. Cushing's syndrome reflects:
Explanation: Excess glucocorticoid activity underlies the syndrome.
110. Diabetes insipidus differs from diabetes mellitus because it is mainly due to problem with:
Explanation: ADH deficiency causes high urine volume and intense thirst without primary glucose disorder.
111. Which gland disorder is directly connected with iodine deficiency?
Explanation: Iodine deficiency reduces thyroid hormone synthesis and may enlarge thyroid.
112. Presence of sugar in urine along with persistent hyperglycaemia most strongly points to:
Explanation: Insulin-related glucose imbalance causes this pattern.
113. Low PTH would be expected to decrease:
Explanation: PTH normally raises blood calcium.
114. Pituitary dwarfism and gigantism are both linked with abnormal secretion of:
Explanation: Both conditions relate to GH deficiency or excess.
115. Which statement is correct?
Explanation: This is one of their most important physiological roles.
116. Negative feedback in endocrine system is important because it:
Explanation: Feedback stabilizes hormone levels and physiological responses.
117. Which pair is correctly matched?
Explanation: The other options mismatch disorder and hormonal basis.
118. Which condition is most directly related to impaired regulation of blood glucose?
Explanation: This disease centers on insulin action and glucose homeostasis.
119. The best integrated statement is:
Explanation: This captures how endocrine balance can fail in multiple ways.
120. For rapid NEET revision, the strongest combination is:
Explanation: The chapter is highly interconnected and is best revised as a full hormonal network.
121. Revision Booster 1. Recheck this Chemical Coordination and Integration concept with a fresh option order. Hypothyroidism in children can lead to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Severe thyroid deficiency during development causes cretinism.
122. Revision Booster 2. Recheck this Chemical Coordination and Integration concept with a fresh option order. Adult hypothyroidism with low metabolic rate and puffiness is commonly linked with:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Myxoedema is a classical adult hypothyroid condition.
123. Revision Booster 3. Recheck this Chemical Coordination and Integration concept with a fresh option order. Excess thyroid hormone generally causes:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Hyperthyroidism raises basal metabolic rate.
124. Revision Booster 4. Recheck this Chemical Coordination and Integration concept with a fresh option order. A classic sign of diabetes mellitus is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Reduced insulin action results in elevated blood sugar.
125. Revision Booster 5. Recheck this Chemical Coordination and Integration concept with a fresh option order. Tetany can occur due to low blood calcium often linked with hyposecretion of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Low PTH can reduce blood calcium and cause neuromuscular irritability.