Class 11 Biology — Chapter 19: Chemical Coordination and Integration
60 practice questions · 20 Easy · 20 Medium · 20 Hard
Practise Class 11 Biology Chapter 19, "Chemical Coordination and Integration", with 60 NCERT-aligned multiple-choice questions. The set is split into 20 Easy, 20 Medium and 20 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Chemical Coordination and Integration" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Chemical Coordination and Integration, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Biology mastery score. A few sample questions are shown below; sign in free to practise all 60.
Key concepts: Chemical Coordination and Integration (Class 11 Biology)
This chapter covers the endocrine system — the major endocrine glands, their hormones, and the mechanism and regulation of hormone action.
- Endocrine system
- Ductless glands secrete hormones directly into the blood; coordination is slower but longer-lasting than neural control.
- Major glands
- Hypothalamus, pituitary, thyroid, parathyroid, adrenal, pancreas and gonads, each with specific hormones.
- Pituitary as master gland
- The pituitary controls other glands; the hypothalamus in turn controls the pituitary.
- Hormone action
- Peptide hormones act via membrane receptors and second messengers; steroid hormones enter cells and act on genes.
- Feedback regulation
- Hormone levels are kept in balance by feedback loops (mostly negative feedback).
💡 Exam tips for Chemical Coordination and Integration
- Link each gland to its key hormone and effect (e.g. thyroid→thyroxine→metabolism, pancreas→insulin→blood glucose).
- Negative feedback keeps hormone levels stable — rising hormone suppresses its own further release.
Sample questions
Master gland of endocrine system:
Controls many other endocrine glands.
Glucagon is secreted by ___ cells of pancreas.
α-cells secrete glucagon (raises glucose); β secrete insulin.
Iodine is essential for the synthesis of:
Deficiency causes goitre and hypothyroidism.
Chemical Coordination and Integration — FAQs
What are the key concepts in Class 11 Biology Chemical Coordination and Integration?+
This chapter covers the endocrine system — the major endocrine glands, their hormones, and the mechanism and regulation of hormone action. Key ideas include Endocrine system, Major glands, Pituitary as master gland, Hormone action, Feedback regulation.
What does Class 11 Biology Chapter 19 (Chemical Coordination and Integration) cover on XamBaaz?+
It covers 60 NCERT-aligned MCQs on "Chemical Coordination and Integration" — 20 Easy, 20 Medium and 20 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Chemical Coordination and Integration" questions free to practise?+
Yes — sign in with Google to practise "Chemical Coordination and Integration" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Chemical Coordination and Integration" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Practise all 60 questions free
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