Chemical coordination and regulation play a crucial role in maintaining homeostasis and controlling various physiological functions in the human body. Understanding the endocrine glands, hormone functions, and their mechanisms is essential for NEET aspirants. This mock test presents 20 hard-level multiple-choice questions (MCQs) based on the official NEET syllabus to assess your knowledge. Test yourself and enhance your preparation!

NEET 2025 Chemical Coordination and Regulation Mock Test – 20 Hard-Level Questions

📌 Mock Test: Hard-Level Questions:

Endocrine Glands and Hormones

Q. Which hormone regulates circadian rhythm?

• Thyroxine
• Melatonin
• Insulin
• Adrenaline

Q. Which endocrine gland controls metabolic rate?

• Parathyroid
• Thyroid
• Pancreas
• Adrenal cortex

Q. The hormone that regulates blood calcium levels is:

• Calcitonin
• Insulin
• Glucagon
• Oxytocin

Q. Adrenal medulla secretes which hormone?

• Thyroxine
• Epinephrine
• Parathyroid hormone
• Insulin

Q. Which hormone controls water balance in the body?

• Oxytocin
• Vasopressin (ADH)
• Aldosterone
• Testosterone

Hormone Action & Mechanisms

Q. Which hormone acts via a second messenger system?

• Insulin
• Testosterone
• Thyroxine
• Cortisol

Q. Which endocrine gland produces reproductive hormones?

• Pancreas
• Thyroid
• Gonads
• Adrenal cortex

Q. Which hormone is responsible for milk ejection during lactation?

• Estrogen
• Progesterone
• Oxytocin
• Prolactin

Q. Which hormone directly affects kidney function?

• Growth hormone
• Vasopressin (ADH)
• Epinephrine
• Thyroxine

Q. Which hormone is secreted when blood sugar levels are low?

• Insulin
• Glucagon
• Somatostatin
• Thyroxine

Hormonal Disorders & Imbalances

Q. Deficiency of insulin leads to which disease?

• Addison’s disease
• Diabetes mellitus
• Acromegaly
• Cushing’s syndrome

Q. Excess cortisol secretion leads to:

• Addison’s disease
• Cushing’s syndrome
• Diabetes insipidus
• Hypothyroidism

Q. Which condition is caused by iodine deficiency?

• Gigantism
• Goiter
• Acromegaly
• Diabetes mellitus

Q. Which disorder results from excessive thyroxine secretion?

• Cretinism
• Addison’s disease
• Grave’s disease
• Diabetes mellitus

Q. Which disease results from aldosterone deficiency?

• Acromegaly
• Addison’s disease
• Cushing’s syndrome
• Diabetes insipidus

Advanced Conceptual Questions

Q. Which hormone is responsible for sodium retention in kidneys?

• Aldosterone
• Insulin
• Thyroxine
• Cortisol

Q. Which endocrine gland has both neural and hormonal functions?

• Adrenal cortex
• Hypothalamus
• Parathyroid
• Pancreas

Q. Which hormone regulates female secondary sexual characteristics?

• Estrogen
• Progesterone
• Oxytocin
• Testosterone

Q. Which hormone is responsible for increasing blood glucose levels?

• Insulin
• Glucagon
• Epinephrine
• Thyroxine

Q. Which hormone plays a major role in the fight-or-flight response?

• Oxytocin
• Epinephrine
• Aldosterone
• Cortisol

Conclusion:

This NEET 2025 Chemical Coordination and Regulation mock test covers key concepts related to endocrine glands, hormone action, and disorders. Attempt these hard-level MCQs to test your knowledge and strengthen your exam preparation. Stay tuned for more mock tests, study guides, and in-depth concept explanations on Science Coat!

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