Gaseous Exchange Class 10 Notes

Complete 10th class biology chapter 1 notes in 10th Class Biology English Medium written by Professor Mr. Adnan Haider. These computerized notes are very helpful in the preparation of 10th class biology chapter 1 notes for students of the 10th class Biology and these are according to the paper patterns of all Punjab boards.

• Important 10th class biology chapter 1 mcqs for all students of Punjab  Textbook Board.
• Important Multiple Choice Questions ( MCQs ) with correct Answers of Chapter No. 10: Gaseous Exchange in Biology class 10th English Medium.
• Important 10 class biology chapter 1 mcqs for all students of Punjab  Textbook Board.
• Important Short Questions with Correct Answers of Chapter No. 10: Gaseous Exchange in Biology class 10th English Medium.
• How lenticels are different from stomata? Or, What are lenticels?
• Important class 10 biology chapter 1 mcqs with answers for all students of Punjab  Textbook Board.
• Define cellular respiration. and  What is Aerobic Respiration?
• What is meant by gaseous exchange?
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• Differentiate between respiration and breathing.
• Write a short note on gaseous exchange in Plants.
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• What is the difference between daytime respiration and nighttime respiration?
• Differentiate between stomata and air spaces.
• Define nasal Cavity.
• Important 10th class biology chapter 1 exercise for all students of Punjab  Textbook Board.
• What is the function of mucous present in the nasal cavity?
• Define epiglottis. Write its function.
• Differentiate between glottis and epiglottis.
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• What is the role of epiglottis in the respiration?
• Differentiate between bronchi and bronchioles
• What is the role of the pharynx in the respiration?
• Important biology class 10 chapter 1 full explanation for all students of Punjab  Textbook Board.
• What are Alveoli?
• Describe trachea.
• Write the structure and function of the alveolus.
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• Write the importance of the trachea in the respiratory system.
• How smoking affects the social life of a person?
• Does smoking effect only the lungs?
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• How much risk of tuberculosis and pneumonia are increased by smoking?
• What is normal rate of respiration in human? How it is controlled brain?
• Important class 10 biology chapter 1 important diagrams for all students of Punjab  Textbook Board.
• What are pleural membranes? Write down their function.
• Describe the changes which take place during expiration or exhalation in the chest cavity? Or Describe the changes which take place, during inspiration or inhalation in the chest cavity.
• Important 10th class biology chapter 1 short questions pdf for all students of Punjab  Textbook Board.
• Long Questions: Describe the functions of the nasal cavity, voice box, pharynx, and alveoli
• What is Bronchitis? Write its types.
• Describe the causes and symptoms of Bronchitis and Amphysema.
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• Write a note on amphysema and asthma.
• The larynx is a box, made of cartilage. It is present between pharynx and trachea. It is also called the voice box. Two pairs of fibrous bands called vocal cords are stretched across the larynx. The vocal cords vibrate when the air passes through them.
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•  This vibration produces sounds. Larynx continues to the trachea, which is also called the windpipe. It is about 12 cm long tube which lies in front of the oesophagus. 
• Important class 10th biology chapter 1 short notes for all students of Punjab  Textbook Board.
• There are C-shaped cartilagenous rings in the wall of trachea. The cartilages keep the trachea from collapsing even when there is no air in it. 
• Important class 10 biology chapter 1 short questions and answers for all students of Punjab  Textbook Board.
• On entering the chest cavity, the trachea divides into two smaller tubes called bronchi (Singular: bronchus). The bronchi also have cartilagenous plates in their walls. Each bronchus enters into the lung of its side and then divides into smaller branches.
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•  The bronchi continue dividing in the lungs until they make several fine tubes called bronchioles. The bronchioles progressively lose the cartilages as they become narrower. The bronchioles end as fine tubules called the alveolar ducts.
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•  Each alveolar duct opens into a cluster of pouches called alveoli. The alveoli form the respiratory surface in human body. Each alveolus is a sac-like structure lined by a single layer of epithelial cells. It is bound on the outside by a network of capillaries.
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•  The pulmonary artery from the heart containing deoxygenated blood enters the lungs and branches into arterioles and then into capillaries which surround the alveoli. 
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• These then join together to form the venules which form pulmonary vein. The pulmonary vein carries the oxygenated blood back to the heart.
• The Lungs: All the alveoli on one side constitute a lung. There is a pair of lungs in the thoracic cavity. 
• Important class 10 biology chapter 1 important diagrams for all students of Punjab  Textbook Board.
• The chest wall is made up of 12 pairs of ribs and the rib muscles called intercoastal muscles. A thick muscular structure, called diaphragm, is present below the lungs. 
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• The left lung is slightly smaller and has two lobes and the right lung is bigger with three lobes. They are spongy and elastic organs. The lungs also have blood vessels that are the branches of the pulmonary arteries and veins.
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•  Each lung is enclosed by two membranes called the outer pleural membrane and the inner pleural membrane. The membranes enclose a fluid which provides lubrication for the free expanding and contracting of the lungs.