Breathing and Exchange of Gases
Chhattisgarh Board · Class 11 · Biology
Flashcards for Breathing and Exchange of Gases — Chhattisgarh Board Class 11 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
Interactive on Super Tutor
Studying Breathing and Exchange of Gases? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
1,000+ Class 11 students started this chapter today
What is breathing (respiration) and why is it essential for life?
Answer
Breathing is the process of exchange of O₂ from the atmosphere with CO₂ produced by the cells. It is essential because: 1) O₂ is needed to break down glucose, amino acids, and fatty acids to produce e…
Compare the respiratory methods used by different groups of animals.
Answer
Lower invertebrates (sponges, flatworms): Simple diffusion over body surface. Earthworms: Moist cuticle. Insects: Tracheal tubes. Aquatic animals (fish, arthropods): Gills (branchial respiration). Ter…
Trace the path of air from external nostrils to alveoli in the human respiratory system.
Answer
External nostrils → Nasal chamber → Pharynx → Larynx → Trachea → Primary bronchi (right and left) → Secondary bronchi → Tertiary bronchi → Bronchioles → Terminal bronchioles → Alveoli…
What is the function of epiglottis and where is it located?
Answer
The epiglottis is a thin elastic cartilaginous flap located above the larynx. During swallowing, it covers the glottis (opening of larynx) to prevent food from entering the larynx and trachea, thus pr…
Differentiate between the conducting part and respiratory part of the respiratory system.
Answer
Conducting Part: From external nostrils to terminal bronchioles. Functions: Transports air, clears foreign particles, humidifies air, brings air to body temperature. Respiratory Part: Alveoli and thei…
Describe the structure and importance of pleura in the respiratory system.
Answer
Pleura is a double-layered membrane covering the lungs. Outer pleural membrane: In contact with thoracic lining. Inner pleural membrane: In contact with lung surface. Pleural fluid between layers redu…
Explain the mechanism of inspiration (inhalation).
Answer
1) Diaphragm contracts → increases thoracic volume in antero-posterior axis, 2) External intercostal muscles contract → lifts ribs and sternum → increases thoracic volume in dorso-ventral axis, 3) Inc…
Explain the mechanism of expiration (exhalation).
Answer
1) Diaphragm and intercostal muscles relax, 2) Diaphragm and sternum return to normal positions, 3) Thoracic volume decreases → pulmonary volume decreases, 4) Intrapulmonary pressure increases (above …
+17 more flashcards available
Practice AllFrequently Asked Questions
What are the important topics in Breathing and Exchange of Gases for Chhattisgarh Board Class 11 Biology?
How to score full marks in Breathing and Exchange of Gases — Chhattisgarh Board Class 11 Biology?
How many flashcards are available for Breathing and Exchange of Gases?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Breathing and Exchange of Gases
Important Questions
Practice with board exam-style questions
Syllabus
What topics to cover
Revision Notes
Key points for last-minute revision
Study Plan
Step-by-step plan to ace this chapter
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Practice Quiz
Test yourself with a quick quiz
Concept Maps
See how topics connect visually
NCERT Solutions
Every textbook question solved step by step
For serious students
Get the full Breathing and Exchange of Gases chapter — for free.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for Chhattisgarh Board Class 11 Biology.