Biology · chapter PYQs

Chemical Coordination and Integration, on the exam screen.

6 questions from NEET 2026, Re-NEET 2026, NEET 2020, 6 minutes, marked +4 / −1. See them with solutions.

Chemical Coordination and Integration · PYQs

Candidate: You

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Q1/6

Question 1 · NEET 2026 · Q136 · +4 / −1

Match List I with List II:

List I	List II
P) Cortisol	I) Stimulates the formation of alveoli in mammary glands
Q) Aldosterone	II) Produces anti-inflammatory reactions
R) Cholecystokinin	III) Stimulates reabsorption of Na+ and water from renal tubule
S) Progesterone	IV) Stimulates secretion of pancreatic enzymes and bile juice

Choose the correct answer from the options given below:

Answer and explanation

Answer: (3)

Cortisol (a glucocorticoid) produces anti-inflammatory reactions and suppresses immune responses (II). Aldosterone, a mineralocorticoid, stimulates reabsorption of $\mathrm{Na}^{+}$ and water from the renal tubules (III). Cholecystokinin from the intestinal mucosa stimulates secretion of pancreatic enzymes and bile juice (IV). Progesterone acts on the mammary glands to stimulate formation of alveoli (I). Thus P-II, Q-III, R-IV, S-I.

Question 2 · Re-NEET 2026 · Q99 · +4 / −1
Which of the following statements related to pituitary gland are correct?

Statement I: It is divided anatomically into adenohypophysis and neurohypophysis
Statement II: It secretes follicle stimulating hormone
Statement III: It secretes melanocyte stimulating hormone
Statement IV: It does not secrete prolactin

Choose the correct answer from the options given below :
Answer and explanation
Answer: (2)
The pituitary is anatomically divided into the adenohypophysis (anterior) and neurohypophysis (posterior), so (Statement I) is correct. The pars distalis of the adenohypophysis secretes FSH among other trophic hormones, making (Statement II) correct, and the pars intermedia secretes MSH, making (Statement III) correct. Statement IV is false: prolactin IS a pituitary hormone, secreted by the pars distalis to regulate mammary growth and milk production. NCERT Class 11, Chemical Coordination and Integration.
Question 3 · Re-NEET 2026 · Q124 · +4 / −1
Which one of the following statements is incorrect?
Answer and explanation
Answer: (2)
The islets of Langerhans divide the labour cleanly: $\alpha$ -cells secrete glucagon, which raises blood glucose, and $\beta$ -cells secrete insulin, which lowers it. Option (2) assigns insulin to the wrong cell type. Note that options (1) and (4) together give the correct pairing, so the two can be used to check each other. NCERT Class 11, Chemical Coordination and Integration.

Question 4 · Re-NEET 2026 · Q148 · +4 / −1

Match List-I with List-II.

List I	List II
P) Excess growth hormone	I) Reabsorption of water and electrolytes in kidney
Q) Luteinizing hormone	II) Contraction of uterus during child birth
R) Vasopressin	III) Acromegaly
S) Oxytocin	IV) Ovulation

Choose the correct answer from the options given below:

Answer and explanation

Answer: (2)

Excess growth hormone in adults thickens the bones of the hands, feet and face, producing acromegaly (P-III). Luteinizing hormone triggers the rupture of the Graafian follicle at ovulation (Q-IV). Vasopressin, or antidiuretic hormone (ADH), acts on the distal tubule and collecting duct to reabsorb water and electrolytes (R-I). Oxytocin drives the powerful uterine contractions of labour (S-II). NCERT Class 11, Chemical Coordination and Integration.

Question 5 · NEET 2020 · Q9 · +4 / −1
Match the following columns and select the correct option.
List I
List II
P) Pituitary gland
I) Grave's disease
Q) Thyroid gland
II) Diabetes mellitus
R) Adrenal gland
III) Diabetes insipidus
S) Pancreas
IV) Addison's disease
Answer and explanation
Answer: (2)
Pituitary/antidiuretic hormone (ADH) dysfunction causes diabetes insipidus, thyroid hyperactivity causes Graves' disease, adrenal hypofunction causes Addison's disease, and pancreatic insulin dysfunction causes diabetes mellitus. Thus P-III, Q-I, R-IV, S-II. Chapter: Chemical Coordination and Integration.
Question 6 · NEET 2020 · Q58 · +4 / −1
Select the correct statement.
Answer and explanation
Answer: (4)
Glucocorticoids, such as cortisol, stimulate gluconeogenesis, the process of glucose synthesis from non-carbohydrate sources. Chapter: Chemical Coordination and Integration.

List I	List II
P) Pituitary gland	I) Grave's disease
Q) Thyroid gland	II) Diabetes mellitus
R) Adrenal gland	III) Diabetes insipidus
S) Pancreas	IV) Addison's disease