NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

1 Hard

1 of 1

Application +4 | -1

Because of the relatively high altitude of Antonito, Colorado, the town has a normal barometric pressure of about

600 {~mm} {Hg}

rather than

760 {~mm} {Hg}

as at sea level. The partial pressure of oxygen in Antonito's air is approximately:

View answer and explanation

Correct option: B

126 {~mm} {Hg}

Option B (126 mm Hg) is correct because the partial pressure of oxygen is approximately 21% of the total barometric pressure, so 0.21 * 600 mm Hg = 126 mm Hg.

More Questions from BREATHING AND EXCHANGE OF GASES

Practice All Chapter MCQs →

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