Biology Objective Questions and Answers: Chemical Coordination and Integration
Explore reliable objective questions for Chemical Coordination and Integration tailored for NEET learners. Utilizing these Biology multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.
Download Chemical Coordination and Integration MCQs with Answers
View or download the dedicated Chemical Coordination and Integration MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Biology evaluations.
Multiple Choice Questions
(a) Zona glomerulosa
(b) Zonan fasiculata
(c) Zona reticularis
(d) Medulla of adrenal
Show Answer & Explanation
Answer: (d) Medulla of adrenal
Explanation:
1. Noradrenaline (norepinephrine) is secreted by the adrenal medulla.
Teacher's Note:
1. The cortex zones secrete steroids.
2. Medulla secretes norepinephrine.
(a) Anterior pituitary
(b) Pancreas
(c) Adrenal
(d) Thyroid
Show Answer & Explanation
Answer: (c) Adrenal
Explanation:
1. The adrenal cortex releases aldosterone, which maintains salt (electrolyte) balance.
Teacher's Note:
1. Mineralocorticoid action.
2. Adrenal maintains salt balance.
(a) Adrenals
(b) Liver
(c) Thyroid
(d) Testes
Show Answer & Explanation
Answer: (c) Thyroid
Explanation:
1. The thyroid gland takes up iodine to make thyroxine, so it has the largest amount of iodine in the body.
Teacher's Note:
1. Iodised salt prevents goitre.
2. Thyroid holds most iodine.
(a) Thyroid
(b) Parathyroid
(c) Pituitary
(d) Adrenals
Show Answer & Explanation
Answer: (d) Adrenals
Explanation:
1. The adrenal medulla secretes adrenaline and noradrenaline, which prepare the body for fight, flight and fear.
Teacher's Note:
1. It is called emergency gland.
2. Adrenals prepare for fight or flight.
(a) Adrenal gland
(b) Pineal gland
(c) Pituitary gland
(d) Thyroid gland
Show Answer & Explanation
Answer: (a) Adrenal gland
Explanation:
1. Corticosteroids such as cortisol and aldosterone are secreted by the adrenal cortex.
Teacher's Note:
1. The medulla makes catecholamines.
2. Adrenal cortex secretes corticoids.
(a) Zona glomerulosa
(b) Zona fasciculata
(c) Zona reticularis
(d) Zona pellucida
Show Answer & Explanation
Answer: (a) Zona glomerulosa
Explanation:
1. Aldosterone is secreted by the zona glomerulosa, the outer zone of the adrenal cortex.
Teacher's Note:
1. The middle zone fasciculata makes cortisol.
2. Zona glomerulosa gives aldosterone.
(a) hypoglycemia
(b) hyperglycaemia
(c) hyposuria
(d) hypersuria
Show Answer & Explanation
Answer: (b) hyperglycaemia
Explanation:
1. A rise in blood glucose is hyperglycaemia, as seen in diabetes mellitus.
Teacher's Note:
1. Hypoglycaemia is a fall.
2. High glucose is hyperglycaemia.
(a) increased blood calcium level
(b) decreased blood calcium level
(c) increased blood sugar level
(d) decreased blood sugar level
Show Answer & Explanation
Answer: (b) decreased blood calcium level
Explanation:
1. Parathormone is secreted when the blood calcium level is low; it raises calcium by mobilising it from bone.
Teacher's Note:
1. Calcitonin acts when calcium is high.
2. PTH is released at low calcium.
(a) thyroid gland
(b) thymus gland
(c) pituitary gland
(d) Islets of Langerhans
Show Answer & Explanation
Answer: (c) pituitary gland
Explanation:
1. ACTH (adrenocorticotropic hormone) is secreted by the anterior pituitary and stimulates the adrenal cortex.
Teacher's Note:
1. It controls cortisol.
2. ACTH is a pituitary hormone.
(a) Reproduction
(b) Immunology
(c) Calcium balance
(d) Blood coagulation
Show Answer & Explanation
Answer: (b) Immunology
Explanation:
1. The thymus produces thymosins and helps in maturation of T lymphocytes, so it is concerned with immunity.
Teacher's Note:
1. It is large in children.
2. Thymus is for immunity.
(a) Adrenal gland
(b) Pituitary gland
(c) Pineal gland
(d) Thymus gland
Show Answer & Explanation
Answer: (c) Pineal gland
Explanation:
1. Melatonin, which regulates the sleep-wake cycle and body rhythms, is secreted by the pineal gland.
Teacher's Note:
1. It is light sensitive.
2. Pineal secretes melatonin.
(a) Milk secretion
(b) Erythrocytes
(c) T-lymphocytes
(d) Melanocytes
Show Answer & Explanation
Answer: (c) T-lymphocytes
Explanation:
1. Thymosins promote differentiation of T lymphocytes, building cell-mediated immunity.
Teacher's Note:
1. They are produced by the thymus.
2. Thymosin acts on T cells.
(a) Pituitary
(b) Thymus
(c) Parathyroid
(d) Pancreas
Show Answer & Explanation
Answer: (d) Pancreas
Explanation:
1. Insulin from the pancreas converts glucose into glycogen in the liver (glycogenesis).
Teacher's Note:
1. Glucagon does the reverse.
2. Pancreas insulin forms glycogen.
(a) Pituitary
(b) Mammary gland
(c) Thyroid
(d) Pancreas Glucagon is secreted by :- 40. (1) b(beta) cells of islets of langerhans (2) a (alphs) cells of islets of langerhans (3) b cells of pancreas (4) Adrenal cortex
Show Answer & Explanation
Answer: (d) Pancreas Glucagon is secreted by :- 40. (1) b(beta) cells of islets of langerhans (2) a (alphs) cells of islets of langerhans (3) b cells of pancreas (4) Adrenal cortex
Explanation:
1. The pancreas is both exocrine (digestive juice) and endocrine (islets of Langerhans).
Teacher's Note:
1. It secretes insulin and glucagon.
2. Pancreas is mixed gland.
(a) Increase glycogenesis
(b) Increase glycogenolysis
(c) Increase up take of amino acid by liver and muscle
(d) Promote oxidation of glucose
Show Answer & Explanation
Answer: (b) Increase glycogenolysis
Explanation:
1. Insulin promotes glycogenesis, glucose uptake and oxidation, and amino acid uptake, but not glycogenolysis which is promoted by glucagon.
Teacher's Note:
1. Insulin lowers blood glucose.
2. Insulin does not increase glycogenolysis.
(a) Glucose level of blood
(b) Glucose level of wine
(c) Glucose level of cells
(d) None of these
Show Answer & Explanation
Answer: (c) Glucose level of cells
Explanation:
1. Insulin increases glucose uptake by cells, so it lowers blood glucose and raises the glucose level in cells.
Teacher's Note:
1. Urine glucose falls too.
2. Cell glucose increases.
(a) Cortisol
(b) Oxytocin
(c) Aldosterone
(d) Glucagon
Show Answer & Explanation
Answer: (d) Glucagon
Explanation:
1. Glucagon is antagonistic to insulin as it raises blood glucose.
Teacher's Note:
1. Cortisol also raises glucose but acts differently.
2. Glucagon is the anti-insulin.
(a) Pineal gland
(b) Parathyroid gland
(c) Thymus gland
(d) Adrenal gland
Show Answer & Explanation
Answer: (c) Thymus gland
Explanation:
1. The thymus shrinks with age, so the immune response weakens in old age.
Teacher's Note:
1. T cell production falls.
2. Thymus degeneration weakens immunity.
Multiple Choice Questions (MCQs) for NEET Biology Chemical Coordination and Integration
About Chemical Coordination and Integration MCQs for NEET Biology
Review structured objective questions for NEET Biology Chemical Coordination and Integration. Built according to official NEET guidelines, these MCQ sets support daily revision and core concept reinforcement.
How to Verify Your MCQ Answers
Each question includes structured solution keys mapped directly to standard NEET textbooks, helping students evaluate their reasoning and correct mistakes early in their revision.
Enhance Speed with Online MCQ Tests
Explore our broader library of printable assignments, chapter notes, and mock tests designed to support continuous revision and secure higher marks in NEET assessments.
FAQs
You can get most exhaustive NEET Biology Chemical Coordination and Integration MCQs Set 20 for free on StudiesToday.com. These MCQs for NEET Biology are updated for the 2026-27 academic session as per NEET examination standards.
Yes, our NEET Biology Chemical Coordination and Integration MCQs Set 20 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the NEET paper is now competency-based.
By solving our NEET Biology Chemical Coordination and Integration MCQs Set 20, NEET students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Biology.
Yes, Biology MCQs for NEET have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused NEET exams.
Yes, you can also access online interactive tests for NEET Biology Chemical Coordination and Integration MCQs Set 20 on StudiesToday.com as they provide instant answers and score to help you track your progress in Biology.