Breathing and exchange of gases practice · Mixed difficulty

At rest, most people require an alveolar ventilation for about $4 {~L} /$ minute. Suppose an emphysema victim with a tidal volume of $0.5 {~L}$ has suffered alveolar damage that has produced a respiratory dead space of $0.3 {~L}$, what will be that person's frequency of breathing at rest?

Site of aerobic respiration in higher organisms is/are

Find the incorrect statement:

Which of the following changes will not affect respiration?

The volume of air that will remain in the lungs after a normal expiration is known as

The basic rhythm of breathing is established by

Which of the following situations would result in the greatest degree of ${O}_2$ saturation for haemoglobin, assuming ${pO}_2$ remains constant?

Why breathing is accelerated when the person opens his nose after holding the breathe by closing his nose?

Which of the following statement is false?

$\mathrm{C}{\mathrm{O}_2}$ dissociates in alveoli from carbohaemoglobin when

Identify which respiratory structure possesses the following features and choose the correct option accordingly
I. Found in mammals
II. Highly muscular and fibrous partition, elevated towards the thorax like a dome
III. Separates thoracic and abdominal cavity

Carbonic anhydrase is found in

Vocal cords occur in

Which have no specific organ for respiration but respire ?

Select the incorrect match about the boundaries of the thoracic chamber

The total volume of air a person can expire after a forcible inspiration is called as

Exchange of gases in lungs occurs through

What is the partial pressure of oxygen in the blood flowing through pulmonary artery?

Complete the analogy
Industrial pollutants : Occupational respiratory disorders :: Cigarette smoking: ______

Mr. Josh exhales normally, then using forced expiration, he exhales as much air as possible. The volume of air still remaining in his lungs is called

The factors are all favourable for the formation of oxyhaemoglobin except one that is

Rate of breathing is controlled by

Tobacco smoke contains carbon monoxide, which

Animals who use their skin as an accessory respiratory organ are
I. lizard II. frog
III. rabbit IV. Zebra
Choose the correct option

What happens to the respiratory process in a man-going up a hill?

Which of the following respiratory organs are present in spiders and scorpions?

Which of the following conditions are found in the alveoli of lungs?
I. high $\mathrm{P}{\mathrm{O}_2}$
II. Low $\mathrm{PC}{\mathrm{O}_2}$
III. high $\mathrm{PC}{\mathrm{O}_2}$
IV. low $\mathrm{P}{\mathrm{O}_2}$
V. low ${H^ + }$
VI. High ${H^ + }$
Choose the correct option

Cyanosis is

I. On an average a healthy human breathes 12-16 times/minute
II. The volume of air involved in the breathing movements can be estimated by spirometer
III. Diaphragm is very useful in both inspiration and expiration
Which of the above statements are incorrect?
Choose the correct option

Breathing involves …A… during which atmospheric air is drawn in and …B… by which the alveolar air is released out.
Choose the correct option for A and B to complete the given NCERT statement