NEET Chemical Coordination and Integration PYQs & Practice Questions

10 free NEET Biology questions on Chemical Coordination and Integration, starting with previous year questions (2016–2026). Tap “Show answer” to check each one. No login needed.

Topics: Hormones of the Anterior Pituitary · Stress Hormones · Aldosterone and Electrolyte Balance · Thymosin and Immunity · Second Messengers in Hormone Action · Leydig Cells and Androgens · Corpus Luteum and Progesterone · Cortisol and the Adrenal Gland · Melatonin and the Sleep-Wake Cycle · Location of Hormone Receptors · Disorders Linked to Thyroid Hormone Levels · Hormone Classification

1. Q1NEET 2026Pancreatic Hormones

   Which one of the following statements is incorrect?

   • A. α-cells of pancreas secrete insulin
   • B. Glucagon stimulates glycogenolysis
   • C. β-cells of pancreas secrete insulin
   • D. α-cells of pancreas secrete glucagon
   Show answer

   Answer: —

   The α-cells of the islets of Langerhans secrete glucagon, not insulin. Insulin is secreted by the β-cells. Glucagon stimulates glycogenolysis (breakdown of glycogen to glucose) in the liver. So the incorrect statement is that α-cells secrete insulin.

2. Q2NEET 2026Pituitary Gland - Hormones and Anatomy

   Which of the following statements related to pituitary gland are correct? (a) It is divided anatomically into adenohypophysis and neurohypophysis (b) It secretes follicle stimulating hormone (c) It secretes melanocyte stimulating hormone (d) It does not secrete prolactin Choose the correct answer from the options given below:

   • A. (a), (b) and (c) only
   • B. (c) and (d) only
   • C. (b) and (c) only
   • D. (a) and (b) only
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   Answer: —

   The pituitary gland is anatomically divided into adenohypophysis (anterior pituitary) and neurohypophysis (posterior pituitary) -- (a) correct. It secretes follicle stimulating hormone (FSH) -- (b) correct. It secretes melanocyte stimulating hormone (MSH) from the pars intermedia -- (c) correct. It DOES secrete prolactin (from the anterior pituitary), so (d) is incorrect. Hence (a), (b) and (c) only.

3. Q3NEET 2026Hormone Functions and Associated Conditions - Matching

   Match List-I with List-II. List-I: (A) Excess growth hormone, (B) Luteinizing hormone, (C) Vasopressin, (D) Oxytocin List-II: (I) Reabsorption of water and electrolytes in kidney, (II) Contraction of uterus during child birth, (III) Acromegaly, (IV) Ovulation Choose the correct answer from the options given below:

   • A. A-III, B-IV, C-I, D-II
   • B. A-II, B-IV, C-I, D-III
   • C. A-IV, B-III, C-I, D-II
   • D. A-III, B-IV, C-II, D-I
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   Answer: —

   Excess growth hormone causes acromegaly (III) in adults. Luteinizing hormone triggers ovulation (IV). Vasopressin (ADH) promotes reabsorption of water and electrolytes in the kidney (I). Oxytocin causes contraction of the uterus during childbirth (II). So A-III, B-IV, C-I, D-II.

4. Q4NEET 2025Hormone-Secreting Organs (Match List: Heart, Kidney, GI tract, Adrenal Cortex)

   Match List-I with List-II: List-I: (A) Heart (B) Kidney (C) Gastro-intestinal tract (D) Adrenal Cortex List-II: (I) Erythropoietin (II) Aldosterone (III) Atrial natriuretic factor (IV) Secretin Choose the correct answer from the options given below:

   • A. A-II, B-I, C-III, D-IV
   • B. A-IV, B-III, C-II, D-I
   • C. A-I, B-III, C-IV, D-II
   • D. A-III, B-I, C-IV, D-II
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   Answer: C — A-I, B-III, C-IV, D-II

   Atrial wall of the Heart secretes the peptide hormone Atrial Natriuretic Factor (ANF), which decreases blood pressure (III). JG cells of the Kidney secrete Erythropoietin, which stimulates erythropoiesis (I). The Gastro-intestinal tract secretes hormones including Secretin, which acts on the exocrine pancreas (IV). The Adrenal Cortex secretes mineralocorticoids like Aldosterone, which maintains water and electrolyte balance (II). So A-III, B-I, C-IV, D-II. 11th NCERT, Page No.- 247, 244.

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5. Q5NEET 2025Adrenal Medullary Hormones - Functions

   Consider the following statements regarding function of adrenal medullary hormones: A. It causes pupilary constriction B. It is a hyperglycemic hormone C. It causes piloerection D. It increases strength of heart contraction Choose the correct answer from the options given below:

   • A. C and D Only
   • B. B, C and D Only
   • C. A, C and D Only
   • D. D Only
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   Answer: A — C and D Only

   Adrenal medullary hormones (adrenaline/noradrenaline) cause pupillary dilation (not constriction), so A is false. They are hyperglycemic (increase blood glucose, B true), cause piloerection (hair standing, C true), and increase the strength and rate of heart contraction (D true). So B, C and D Only.

6. Q6NEET 2025Insulin - Why Not Given Orally

   Why can't insulin be given orally to diabetic patients?

   • A. Human body will elicit strong immune response
   • B. It will be digested in Gastro-Intestinal (GI) tract
   • C. Because of structural variation
   • D. Its bioavailability will be increased
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   Answer: A — Human body will elicit strong immune response

   Insulin is a peptide hormone, so if given orally it would be digested by proteolytic enzymes in the alimentary canal (GI tract) before it could act, hence it must be administered by injection. 11th NCERT, Page No. - 245, 246.

7. Q7NEET 2025Hypothalamic Hormones Released by Posterior Pituitary (ADH)

   Which of the following hormones released from the pituitary is actually synthesized in the hypothalamus?

   • A. Luteinizing hormone (LH)
   • B. Anti-diuretic hormone (ADH)
   • C. Follicle-stimulating hormone (FSH)
   • D. Adenocorticotrophic hormone (ACTH)
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   Answer: A — Luteinizing hormone (LH)

   ADH (vasopressin) and oxytocin are actually synthesized by the hypothalamus and are only stored and released from the posterior pituitary. LH, FSH and ACTH are synthesized and released by the anterior pituitary itself. 11th NCERT, Page No. - 242.

8. Q8NEET 2025Hormone Source Organs (Match List: Progesterone, Relaxin, MSH, Catecholamines)

   Match List-I with List-II. List-I: (A) Progesterone (B) Relaxin (C) Melanocyte stimulating hormone (D) Catecholamines List-II: (I) Pars intermedia (II) Ovary (III) Adrenal medulla (IV) Corpus luteum Choose the correct answer from the options given below:

   • A. A-IV, B-II, C-I, D-III
   • B. A-IV, B-II, C-III, D-II
   • C. A-II, B-IV, C-I, D-III
   • D. A-III, B-II, C-IV, D-I
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   Answer: —

   Progesterone is secreted by the corpus luteum (and placenta) - IV. Relaxin is secreted by the ovary (and placenta) - II. Melanocyte Stimulating Hormone (MSH) is secreted by the pars intermedia of the pituitary - I. Catecholamines (adrenaline + noradrenaline) are secreted by the adrenal medulla - III. So A-IV, B-II, C-I, D-III. 11th NCERT, Page No. - 242, 244, 246.

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9. Q9NEET 2024Hormone Classification

   Which of the following is not a steroid hormone?

   • A. Progesterone
   • B. Glucagon
   • C. Cortisol
   • D. Testosterone
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   Answer: A — Progesterone

   Glucagon is a peptide hormone secreted by pancreatic alpha cells, not a steroid hormone. Progesterone, Cortisol, and Testosterone are all steroid hormones derived from cholesterol.

10. Q10NEET 2024Hormonal Disorders

    Match List I with List II: List I: (A) Exophthalmic goiter (B) Acromegaly (C) Cushing's syndrome (D) Cretinism List II: (I) Excess secretion of cortisol, moon face & hyperglycemia (II) Hypo-secretion of thyroid hormone and stunted growth. (III) Hyper secretion of thyroid hormone & protruding eye balls. (IV) Excessive secretion of growth hormone. Choose the correct answer from the options given below:

    • A. A-III, B-IV, C-II, D-I
    • B. A-III, B-IV, C-I, D-II
    • C. A-I, B-III, C-II, D-IV
    • D. A-IV, B-II, C-I, D-III
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    Answer: A — A-III, B-IV, C-II, D-I

    Exophthalmic goiter involves hyper secretion of thyroid hormone and protruding eye balls (A-III). Acromegaly results from excessive secretion of growth hormone (B-IV). Cushing's syndrome involves excess cortisol, moon face, and hyperglycemia (C-I). Cretinism involves hypo-secretion of thyroid hormone and stunted growth (D-II). So A-III, B-IV, C-I, D-II is correct.