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NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Importance and Snapshot of Breathing and Exchange of Gases - Study ref# 785

Introduction: As you have read earlier, oxygen () is utilized by the organisms to indirectly break down nutrient molecules like glucose and to derive energy for performing various activi... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Importance and Snapshot of Breathing and Exchange of Gases - Study ref# 786

Following sections must be covered to understand the Breathing and Exchange of Gases: 1. Respiratory Organs 2. Mechanism of Breathing 3. Exchange of Gases 4. Transport of Gases 5. Regulation of Respiration 6. Disorders of Resp... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Target Setup for Breathing and Exchange of Gases - Study ref# 787

Student requires to achieve the following milestones to get better grip over Breathing And Exchange Of Gases. The milestones / targets are as follows:Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapt... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4812

Which structure of man is similar to spiracle of cockroach? Answer:   Spiracle of cockroach and nostril in man are the openings through which air enters the body.  ... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4813

Which of the following options is incorrect about the larynx (sound box)? Answer:   Larynx is a cartilaginous box containing nine pieces of cartilages.  ... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4814

Which of the following structures close the glottis during swallowing to prevent the entry of food into wind pipe? Answer:   Epiglottis is a leaf shaped cartilage that closes the glottis (opening leading into trachea) to check the entr... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4816

Mammalian lung have an enormous number of minute alveoli (air sacs). This is to allow Answer:   The number of alveoli in the human lungs has been estimated to be approximately 300 million. This enormous number of alveoli are meant to... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4818

Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure is achieved when  Answer:   Because of the pressure gradient between the lungs and the atmosphere, the ai... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4822

Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place? Answer:   When the internal intercostal muscles contract and diaphragm relax, the ribs move downward and inward and diaphragm... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4831

Which of the following would have the same O2 content? Answer:   Blood entering the right side of the heart i.e., right atrium is a deoxygenated blood having partial pressure of 40 mm Hg. Blood leaving the right side of the heart i.e... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4837

Which of the following statements is true about RBCs in humans? Answer:   Nearly 20-25% of CO2 is transported by RBCs whereas 70% of it is carried as bicarbonate. About 7% of CO2 is carried in a dissolved state through plasma. About ... read more

NEET - Grade 11 - Biology - Breathing and Exchange of Gases - Study ref# 4849

Which of the following is true for CO2 concentration? Answer:   Concentration or partial pressure of CO2 (PCO2) is 40mm Hg in alveolar air and 32 mm Hg in expired air.  ... read more

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