Practice free Breathing and Exchange of Gases (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
What is the approximate volume of air inspired or expired during a normal respiration for a healthy human?
The NCERT text defines Tidal Volume (TV) as 'Volume of air inspired or expired during a normal respiration. It is approx. 500 mL.'
If a person has a Tidal Volume (TV) of 500 mL and an Inspiratory Reserve Volume (IRV) of 2800 mL, what is their Inspiratory Capacity (IC)?
As per the NCERT, 'Inspiratory Capacity (IC): Total volume of air a person can inspire after a normal expiration. This includes tidal volume and inspiratory reserve volume (TV+IRV).' So, IC = 500 mL + 2800 mL = 3300 mL.
The lungs are situated in the thoracic chamber, and any change in the volume of the thoracic cavity is reflected in the lung (pulmonary) cavity. This arrangement is crucial because:
The NCERT explicitly states, 'The anatomical setup of lungs in thorax is such that any change in the volume of the thoracic cavity will be reflected in the lung (pulmonary) cavity. Such an arrangement is essential for breathing, as we cannot directly alter the pulmonary volume.'
Which of the following steps is NOT considered part of the 'Mechanism of Breathing' as described in the NCERT context for human respiration?
The section '14.2 MECHANISM OF BREATHING' states, 'Breathing involves two stages : inspiration during which atmospheric air is drawn in and expiration by which the alveolar air is released out. The movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and the atmosphere.' The 'Diffusion of gases (O2 and CO2) across alveolar membrane' is listed as a separate step in 'Respiration involves the following steps' but not as part of the 'Mechanism of Breathing' itself, which focuses on ventilation.
What is the term for the total volume of air a person can expire after a normal inspiration?
The NCERT states, 'Expiratory Capacity (EC): Total volume of air a person can expire after a normal inspiration. This includes tidal volume and expiratory reserve volume (TV+ERV).'
During normal expiration, the diaphragm and inter-costal muscles:
The NCERT states, 'Relaxation of the diaphragm and the inter-costal muscles returns the diaphragm and sternum to their normal positions and reduce the thoracic volume and thereby the pulmonary volume.'
Which of the following describes the volume of air inspired or expired during a normal respiration?
According to the NCERT text, 'Tidal Volume (TV): Volume of air inspired or expired during a normal respiration. It is approx. 500 mL.'
A healthy human can inspire or expire approximately how much air per minute?
The NCERT states, 'Tidal Volume (TV): ...a healthy man can inspire or expire approximately 6000 to 8000 mL of air per minute.'
What is the average additional volume of air a person can inspire by a forcible inspiration?
The NCERT defines 'Inspiratory Reserve Volume (IRV)' as 'Additional volume of air, a person can inspire by a forcible inspiration. This averages 2500 mL to 3000 mL.'
The volume of air that remains in the lungs even after a forcible expiration is known as:
As per the NCERT text, 'Residual Volume (RV): Volume of air remaining in the lungs even after a forcible expiration. This averages 1100 mL to 1200 mL.'
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Breathing and Exchange of Gases question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.