NeetVictoryQuestion 1: Endocrine Glands and Hormones
The ovary secretes the steroid hormones:
- A insulin
- B oestrogen and progesterone
- C testosterone only
- D glucagon
Answer: B. oestrogen and progesterone
Why: The Graafian follicle secretes the oestrogen.
NEET Biology: Chemical Coordination and Integration. Chapter-wise Practice Questions and Test
Chemical Coordination and Integration is a Class 11 Biology chapter that carries about 3.5% of the Biology questions in NEET. Practise it with 57 questions covering 2 topics, each with an explanation.
Practise Chemical Coordination and Integration
Open in the appSets of 15 questions that adapt to your level, with an explanation for every answer.
Topics covered in Chemical Coordination and Integration
- Endocrine Glands and Hormones (46 questions)
- Mechanism of Hormone Action (11 questions)
How often Chemical Coordination and Integration has come up in NEET
Across the 13 previous year papers, Chemical Coordination and Integration had 31 questions, about 2.4 a year. The most in one paper was 5, in NEET 2025.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 1 |
| NEET 2025 | 5 |
| NEET 2024 | 3 |
| NEET 2023 | 2 |
| NEET 2022 | 2 |
| NEET 2021 | 1 |
| NEET 2020 | 2 |
| NEET 2019 | 3 |
| NEET 2018 | 2 |
| NEET 2017 | 3 |
| NEET 2016 | 3 |
| Re-AIPMT 2015 | 2 |
| AIPMT 2014 | 2 |
Sample questions on Chemical Coordination and Integration with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 2: Mechanism of Hormone Action
Hormones are best described as:
- A the enzymes
- B non-nutrient chemicals which act as the intercellular messengers and are produced in trace amounts
- C the vitamins only
- D the nutrients
Answer: B. non-nutrient chemicals which act as the intercellular messengers and are produced in trace amounts
Why: They are secreted directly into the blood.
Question 3: Endocrine Glands and Hormones
Aldosterone, a mineralocorticoid, acts mainly on:
- A the heart
- B the liver
- C the renal tubules, to cause the reabsorption of Na⁺ and water and the excretion of K⁺ and phosphate ions
- D the pancreas
Answer: C. the renal tubules, to cause the reabsorption of Na⁺ and water and the excretion of K⁺ and phosphate ions
Why: It maintains the electrolyte balance, the body fluid volume, the osmotic pressure and the blood pressure.
Question 4: Mechanism of Hormone Action
The glands which secrete their products directly into the blood without ducts are called:
- A sweat glands
- B salivary glands
- C exocrine glands
- D endocrine glands
Answer: D. endocrine glands
Why: The pancreas has both endocrine and exocrine parts.
Question 5: Endocrine Glands and Hormones
The thyroid hormones are synthesised using:
- A iodine
- B potassium
- C iron
- D calcium
Answer: A. iodine
Why: Thyroxine is T₄ and tri-iodothyronine is T₃.
Question 6: Mechanism of Hormone Action
Steroid hormones typically act on target cells by:
- A binding to cell surface receptors only
- B diffusing through the plasma membrane and binding to intracellular receptors
- C being unable to enter the cell
- D directly altering DNA sequences
Answer: B. diffusing through the plasma membrane and binding to intracellular receptors
Why: Being lipid-soluble, steroid hormones diffuse through the plasma membrane and bind to intracellular (cytoplasmic or nuclear) receptors, forming a complex that regulates gene expression.
Question 7: Endocrine Glands and Hormones
Excess secretion of growth hormone in an adult causes:
- A Addison's disease
- B cretinism
- C acromegaly
- D gigantism
Answer: C. acromegaly
Why: In children, over-secretion causes gigantism; in adults, the bones of the face, hands and feet thicken.
Question 8: Mechanism of Hormone Action
Adrenaline, released from the adrenal medulla during stress, prepares the body for a "fight or flight" response chiefly by:
- A lowering heart rate and blood pressure
- B increasing heart rate, blood pressure and blood glucose
- C inducing sleep
- D slowing respiration
Answer: B. increasing heart rate, blood pressure and blood glucose
Why: Adrenaline rapidly raises heart rate, blood pressure and blood glucose availability, mobilising the body's resources to respond quickly to an emergency.
Practise all of Chemical Coordination and Integration
Open in the appFrequently asked questions
How many questions come from Chemical Coordination and Integration in NEET?
Chemical Coordination and Integration carries about 3.5% of the Biology questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 31 times, about 2.4 questions a year.
Which class is Chemical Coordination and Integration from?
Chemical Coordination and Integration is a Class 11 Biology chapter in the NCERT syllabus.
Where can I practise Chemical Coordination and Integration questions for NEET?
NeetVictory has 57 practice questions on Chemical Coordination and Integration, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.