NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

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During swallowing, glottis can be covered by a thin elastic cartilaginous flap called …A… to prevent the entry of food into larynx. Trachea is a straight tube extending up to …B… cavity, which divides at the level of 5th thoracic vertebra into right and left primary …C…
Choose the correct option for A, B and C from the given four options to complete the above statement with reference to NCERT textbook

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Correct option: B

A-epiglottis, B-mid thoracic, C-bronchi

The correct answer is B (A-epiglottis, B-mid thoracic, C-bronchi) because the epiglottis covers the glottis during swallowing, the trachea extends up to the mid-thoracic cavity, and divides into right and left primary bronchi.

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External gills, tracheae, and lungs all share which of the following sets of characteristics? A person suffers punctures in his chest cavity in an accident, without any damage to the lungs its effect could be Among vertebrates, …A… use gills whereas reptiles, birds and mammals respire through the …B… . Amphibians like frogs can respire through …C… also. Mammals have a well adapted respiratory system
Select appropriate choice for the blanks A, B and C to complete the given NCERT statement The largest quantity of air that can be expired after a maximum inspiratory effort is Assertion : Most fish when out of water, die of
suffocation.

Reason : Atmospheric air contains far less
oxygen content than the dissolved oxygen in
water. The faster breathing in high fever is due to the