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Chemical Coordination and Integration MCQs: Chemical Coordination and Integration is a crucial chapter in Class 11 Biology, focusing on the intricate systems that regulate body functions through hormones and signals. This topic explores how the endocrine system, nervous system, and various signaling pathways coordinate to maintain homeostasis and facilitate processes like growth, metabolism, and reproduction. Within the CBSE syllabus, understanding these mechanisms is vital for grasping complex biological processes.
Chemical Coordination and Integration plays a significant role not only in academic exams but also in competitive tests like NEET. By solving MCQs on this topic, students can strengthen their grasp of the nervous and endocrine systems, key concepts, and their interconnections. This will improve their problem-solving abilities and boost their confidence for exams.
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Chemical Coordination and Integration MCQs
Chemical Coordination and Integration is an essential chapter in the Class 11 Biology curriculum, focusing on the regulatory systems that control and coordinate various physiological processes in the human body. This chapter primarily deals with the mechanisms of the nervous and endocrine systems that help maintain homeostasis, growth, and reproduction. The nervous system coordinates quick responses through electrical impulses, while the endocrine system relies on hormones for slower, long-term regulation.
Key topics covered in this chapter include the structure and function of neurons, the action of hormones, and how they integrate to regulate body functions. By studying this chapter, students gain insights into how our body maintains balance, reacts to changes, and carries out complex processes. It forms the foundation for understanding higher-level biological concepts, especially for competitive exams like NEET.
Chemical Coordination and Integration MCQs with Answers
Q1. Which of the following hormones regulates the basal metabolic rate in humans?
a) Insulin
b) Glucagon
c) Thyroxine
d) Cortisol
Answer: c) Thyroxine
Q2. Which gland is referred to as the “master gland” of the endocrine system?
a) Thyroid gland
b) Adrenal gland
c) Pituitary gland
d) Pineal gland
Answer: c) Pituitary gland
Q3. What is the target organ of Antidiuretic Hormone (ADH)?
a) Liver
b) Kidney
c) Heart
d) Stomach
Answer: b) Kidney
Q4. Which hormone is secreted by the alpha cells of the pancreas?
a) Insulin
b) Glucagon
c) Somatostatin
d) Pancreatic polypeptide
Answer: b) Glucagon
Q5. What type of feedback mechanism regulates most of the hormones in the human body?
a) Positive feedback
b) Negative feedback
c) Neural feedback
d) Continuous feedback
Answer: b) Negative feedback
Q6. Which of the following hormones increases blood calcium levels?
a) Calcitonin
b) Parathyroid hormone (PTH)
c) Thyroxine
d) Insulin
Answer: b) Parathyroid hormone (PTH)
Q7. Which gland is responsible for the secretion of melatonin?
a) Thyroid gland
b) Pituitary gland
c) Pineal gland
d) Adrenal gland
Answer: c) Pineal gland
Q8. What is the function of oxytocin?
a) Increases heart rate
b) Stimulates uterine contractions during childbirth
c) Regulates blood glucose levels
d) Controls water reabsorption in kidneys
Answer: b) Stimulates uterine contractions during childbirth
Q9. Which part of the adrenal gland secretes catecholamines?
a) Adrenal cortex
b) Adrenal medulla
c) Zona glomerulosa
d) Zona reticularis
Answer: b) Adrenal medulla
Q10. Deficiency of iodine in the diet leads to the enlargement of which gland?
a) Pituitary gland
b) Pineal gland
c) Thyroid gland
d) Adrenal gland
Answer: c) Thyroid gland
Q11. Which hormone is involved in the fight-or-flight response?
a) Insulin
b) Adrenaline
c) Glucagon
d) Oxytocin
Answer: b) Adrenaline
Q12. Which of the following hormones is NOT secreted by the anterior pituitary?
a) Prolactin
b) ACTH
c) ADH
d) Growth hormone
Answer: c) ADH
Q13. What is the primary function of aldosterone?
a) Regulation of blood glucose levels
b) Regulation of sodium and potassium levels
c) Stimulation of RBC production
d) Control of heart rate
Answer: b) Regulation of sodium and potassium levels
Q14. Which hormone is responsible for milk ejection during breastfeeding?
a) Prolactin
b) Oxytocin
c) Estrogen
d) Progesterone
Answer: b) Oxytocin
Q15. The hormone insulin is chemically classified as a:
a) Steroid
b) Peptide
c) Amine
d) Glycoprotein
Answer: b) Peptide
Q16. What does hypersecretion of growth hormone in adults lead to?
a) Dwarfism
b) Gigantism
c) Acromegaly
d) Diabetes
Answer: c) Acromegaly
Q17. Which part of the brain regulates the pituitary gland?
a) Cerebellum
b) Medulla oblongata
c) Hypothalamus
d) Thalamus
Answer: c) Hypothalamus
Q18. Which hormone is released in response to low blood sugar levels?
a) Insulin
b) Glucagon
c) Cortisol
d) Epinephrine
Answer: b) Glucagon
Q19. Which of the following hormones is associated with circadian rhythms?
a) Cortisol
b) Melatonin
c) Insulin
d) Glucagon
Answer: b) Melatonin
Q20. Which hormone regulates calcium absorption in the intestines?
a) Vitamin D
b) Calcitonin
c) PTH
d) Thyroxine
Answer: a) Vitamin D
Q21. Which endocrine gland is involved in the immune response?
a) Pineal gland
b) Thymus
c) Adrenal cortex
d) Hypothalamus
Answer: b) Thymus
Q22. The hormone responsible for male secondary sexual characteristics is:
a) Estrogen
b) Testosterone
c) Progesterone
d) Luteinizing hormone
Answer: b) Testosterone
Q23. Hyposecretion of insulin leads to which condition?
a) Hypoglycemia
b) Diabetes mellitus
c) Gigantism
d) Acromegaly
Answer: b) Diabetes mellitus
Q24. Which gland secretes epinephrine and norepinephrine?
a) Pituitary gland
b) Adrenal medulla
c) Adrenal cortex
d) Thyroid gland
Answer: b) Adrenal medulla
Q25. Which hormone inhibits the secretion of growth hormone?
a) Somatostatin
b) Prolactin
c) Oxytocin
d) ACTH
Answer: a) Somatostatin
Q26. Which of the following is a gonadotropic hormone?
a) ACTH
b) FSH
c) ADH
d) PTH
Answer: b) FSH
Q27. What is the role of cortisol in the body?
a) Reduces blood pressure
b) Regulates glucose metabolism
c) Promotes calcium absorption
d) Stimulates growth
Answer: b) Regulates glucose metabolism
Q28. Which hormone regulates blood pressure by acting on kidneys?
a) Aldosterone
b) ADH
c) Cortisol
d) Both a and b
Answer: d) Both a and b
Q29. What is the primary role of prolactin?
a) Milk production
b) Growth regulation
c) Stress response
d) Blood pressure control
Answer: a) Milk production
Q30. Excess secretion of thyroxine leads to:
a) Hypothyroidism
b) Hyperthyroidism
c) Goiter
d) Diabetes
Answer: b) Hyperthyroidism
