Practice MCQs for NEET Biology Chemical Coordination and Integration
Access targeted multiple-choice questions for Chemical Coordination and Integration designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.
Access Chemical Coordination and Integration Questions and Solutions
Access the complete set of multiple-choice questions for Chemical Coordination and Integration below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official NEET textbooks.
Multiple Choice Questions
(a) Pituitary gland
(b) Thyroid gland
(c) Pineal gland
(d) Adrenal gland
Show Answer & Explanation
Answer: (b) Thyroid gland
Explanation:
1. Thyroid hormones regulate basal metabolic rate and development.
Teacher's Note:
1. Pituitary is the master gland.
(a) At the upper side of the larynx
(b) On either side of the trachea
(c) At the junction of the trachea and larynx
(d) Both on either side of trachea and at the junction of trachea and larynx
Show Answer & Explanation
Answer: (d) Both on either side of trachea and at the junction of trachea and larynx
Explanation:
1. The thyroid has two lobes on either side of the trachea, connected by an isthmus, near the larynx.
Teacher's Note:
1. It is in the neck.
(a) Connective tissue band of the thyroid gland
(b) Inside the thyroid follicular cell
(c) In the blood stream
(d) The extracellular space of the thyroid gland (follicle lumen)
Show Answer & Explanation
Answer: (d) The extracellular space of the thyroid gland (follicle lumen)
Explanation:
1. Thyroid hormones are stored as thyroglobulin in the follicle lumen, which is extracellular.
Teacher's Note:
1. Follicular cells synthesise them.
(a) Thymus gland
(b) Thyroid gland
(c) Adrenal cortex
(d) Posterior pituitary gland
Show Answer & Explanation
Answer: (d) Posterior pituitary gland
Explanation:
1. The posterior pituitary (neurohypophysis) develops from neuroectoderm.
Teacher's Note:
1. Adenohypophysis is from Rathke's pouch.
(a) Insulin : hyperglycaemic effect
(b) STH : hypoglycaemic effect
(c) Epinephrine : hyperglycaemic effect
(d) Thyroxine : decreases amino acid uptake
Show Answer & Explanation
Answer: (c) Epinephrine : hyperglycaemic effect
Explanation:
1. Epinephrine promotes glycogen breakdown and raises blood glucose.
Teacher's Note:
1. Insulin lowers blood glucose.
(a) Vision problems
(b) Hearing problems
(c) Decreased insulin secretion
(d) More PRL secretion only
Show Answer & Explanation
Answer: (a) Vision problems
Explanation:
1. A pituitary tumour presses on the optic chiasma above it and causes vision problems.
Teacher's Note:
1. The gland lies below the hypothalamus.
(a) Iodothyroglobulin
(b) Estrogen
(c) Adrenaline
(d) Estradiol
Show Answer & Explanation
Answer: (c) Adrenaline
Explanation:
1. Adrenaline is a water-soluble amine that acts on membrane receptors and uses second messengers like cAMP. Steroid hormones act on intracellular receptors.
Teacher's Note:
1. Steroid hormones enter the cell.
(a) Defence capability
(b) RBC formation
(c) Menstrual cycle regulation
(d) Pigmentation
Show Answer & Explanation
Answer: (b) RBC formation
Explanation:
1. Melatonin influences the sleep-wake cycle, menstruation, pigmentation and defence capacity, but not RBC formation.
Teacher's Note:
1. Melatonin is the pineal hormone.
(a) The thyroid lobes are connected through a non-glandular isthmus
(b) Intracellular hormone storage is unique to the thyroid
(c) Thyroxine is derived from the amino acid arginine
(d) C cells are the major constituent of the thyroid and increase Ca2+ in ECF
Show Answer & Explanation
Answer: (a) The thyroid lobes are connected through a non-glandular isthmus
Explanation:
1. The two lobes are connected by an isthmus, a thin flap of connective tissue
2. Thyroxine derives from tyrosine, and C cells secrete calcitonin, which lowers calcium.
Teacher's Note:
1. Thyroid hormones are stored extracellularly.
(a) TSH
(b) Tri-iodothyronine
(c) Tetra-iodothyronine (thyroxine)
(d) Calcitonin
Show Answer & Explanation
Answer: (c) Tetra-iodothyronine (thyroxine)
Explanation:
1. The thyroid secretes mainly T4 (thyroxine).
Teacher's Note:
1. T3 is the more active form.
(a) Adrenal gland
(b) Thyroid gland
(c) Thymus gland
(d) Pituitary gland
Show Answer & Explanation
Answer: (c) Thymus gland
Explanation:
1. The thymus secretes thymosins that promote T-lymphocyte differentiation.
Teacher's Note:
1. It shrinks with age.
(a) Hormone of beta cells of the pancreas
(b) Hormone of the adrenal medulla
(c) Hormone of the parathyroid
(d) Hormones of the pineal gland
Show Answer & Explanation
Answer: (b) Hormone of the adrenal medulla
Explanation:
1. Adrenaline from the adrenal medulla stimulates glycogenolysis and raises blood glucose.
Teacher's Note:
1. Beta cells secrete insulin, which lowers glucose.
(a) (a), (b)
(b) (b), (c)
(c) (a), (c)
(d) (a), (d)
Show Answer & Explanation
Answer: (d) (a), (d)
Explanation:
1. PTH increases Ca2+ absorption, and T-cell differentiation is promoted by thymosin, not melatonin.
Teacher's Note:
1. Statements b and c are correct.
(a) a, b, d
(b) a, b, c
(c) a, c, d
(d) b, c, d
Show Answer & Explanation
Answer: (b) a, b, c
Explanation:
1. Prolactin, oestrogen and progesterone regulate growth and development of the mammary glands.
Teacher's Note:
1. Oxytocin causes milk ejection.
(a) Adrenaline
(b) Cortisol
(c) Melatonin
(d) Thymosin
Show Answer & Explanation
Answer: (c) Melatonin
Explanation:
1. Melatonin regulates the 24-hour (diurnal) rhythm such as the sleep-wake cycle.
Teacher's Note:
1. It is secreted more at night.
(a) Cortisol
(b) Oxytocin
(c) ACTH
(d) STH
Show Answer & Explanation
Answer: (b) Oxytocin
Explanation:
1. Oxytocin and vasopressin are made in the hypothalamus and stored in the posterior pituitary
2. ACTH and STH come from the anterior pituitary.
Teacher's Note:
1. Neurosecretory cells make them.
(a) Oxytocin : milk synthesis
(b) FSH : maintains the corpus luteum
(c) Thyroxine : requires I2 and glycine
(d) Vasopressin : transport through neural axon
Show Answer & Explanation
Answer: (d) Vasopressin : transport through neural axon
Explanation:
1. Vasopressin is made in the hypothalamus and transported down axons to the posterior pituitary.
Teacher's Note:
1. Oxytocin causes milk ejection, not synthesis.
(a) Cortisol and adrenaline
(b) Only adrenaline
(c) Adrenaline and noradrenaline
(d) Insulin and glucagon
Show Answer & Explanation
Answer: (c) Adrenaline and noradrenaline
Explanation:
1. Adrenaline and noradrenaline from the adrenal medulla prepare the body for emergencies.
Teacher's Note:
1. They are called emergency hormones.
(a) Testosterone
(b) Progesterone
(c) Estrogen
(d) LH
Show Answer & Explanation
Answer: (c) Estrogen
Explanation:
1. Oestrogen promotes duct growth in the mammary gland, and progesterone promotes alveolar development.
Teacher's Note:
1. Estrogen gives ductal growth.
(a) A non-nutrient chemical
(b) An intercellular messenger
(c) Produced in trace amounts
(d) All of these
Show Answer & Explanation
Answer: (d) All of these
Explanation:
1. Hormones are non-nutrient chemicals acting as intercellular messengers and are produced in trace amounts.
Teacher's Note:
1. This is the modern definition.
(a) Pancreas
(b) Pituitary gland
(c) Adrenal gland
(d) Kidney
Show Answer & Explanation
Answer: (d) Kidney
Explanation:
1. The kidney secretes hormones such as erythropoietin, but it is not an organised endocrine gland.
Teacher's Note:
1. Heart and GI tract also secrete hormones.
(a) Adrenal cortex hormone
(b) Anterior pituitary hormone
(c) Posterior pituitary hormone
(d) Alpha cells of the pancreas
Show Answer & Explanation
Answer: (c) Posterior pituitary hormone
Explanation:
1. Oxytocin from the posterior pituitary causes uterine contractions at childbirth.
Teacher's Note:
1. Oxytocin is a positive feedback hormone in labour.
(a) Medulla of the adrenal gland
(b) Pancreatic acini
(c) Adenohypophysis
(d) Melatonin-secreting cells
Show Answer & Explanation
Answer: (c) Adenohypophysis
Explanation:
1. The hypophyseal portal veins carry hypothalamic releasing and inhibiting hormones to the anterior pituitary (adenohypophysis).
Teacher's Note:
1. Neurohypophysis is connected by axons.
Chemical Coordination and Integration Objective Questions & Solutions for NEET Biology
About Chemical Coordination and Integration MCQs for NEET Biology
Test your conceptual understanding of Chemical Coordination and Integration with these targeted multiple-choice questions. Designed in alignment with the latest NEET curriculum for NEET Biology, these problem sets build accuracy and prepare students for objective exams.
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 16 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 16 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 16, 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 16 on StudiesToday.com as they provide instant answers and score to help you track your progress in Biology.