Your cart is empty.
Practice each question, then open the answer or worked solution.
Respiration in insects is called direct because
a. The cell exchanges O2/ CO2 directly with the air in the tubes
b. The tissues exchange O2/ CO2 directly with coelomic fluid
c. The tissues exchange O2/ CO2 directly with the air outside through body surface
d. Tracheal tubes exchange O2/ CO2 directly with the haemocoel, which then exchange with tissues
Option (d) is the answer.
Regarding the functions of our respiratory system, mark the wrong entry.
a. Humidifies the air
b. Warms up the air
c. Exchange of gases
d. Cleans up the air
Option (d) is the answer.
A person suffers punctures in his chest cavity in an accident without any
damage to the lungs. Its effect could be
a. Reduced breathing rate
b. Rapid increase in breathing rate
c. No change in respiration
d. Cessation of breathing
Option (d) is the answer.
It is known that exposure to carbon monoxide is harmful to animals
because
a. It reduces CO2 transport
b. It reduces O2 transport
c. It increases CO2 transport
d. It increases O2 transport
Option (b) is the answer.
Mark the true statement among the following with reference to normal
breathing
a. Inspiration is a passive process where as expiration is active
b. Inspiration is an active process, whereas expiration is passive
c. Inspiration and expiration are active processes
d. Inspiration and expiration are passive processes
Option (b) is the answer.
A person breathes in some volume of air by forced inspiration after having
a forced expiration. This quantity of air taken in is
a. Total lung capacity
b. Tidal volume
c. Vital capacity
d. Inspiratory capacity
Option (c) is the answer.
Mark the incorrect statement in context to O2 binding to Hb
a. Higher pH
b. Lower temperature
c. Lower pCO2
d. Higher PO2
Option (d) is the answer.
Which of the following statements is incorrect regarding the respiratory system?
a. Each terminal bronchiole gives rise to a network of bronchi.
b. the alveoli are highly vascularised.
c. The lungs are covered by a double-layered membrane.
d. The pleural fluid reduces friction on the lung surface.
Option (d) is the answer.
Incidence of Emphysema – a respiratory disorder is high in cigarette
smokers. In such cases
a. The bronchioles are found damaged
b. The alveolar walls are found damaged
c. The plasma membrane is found damaged
d. The respiratory muscles are found damaged
Option (b) is the answer.
Respiratory process is regulated by certain specialized centres in the
brain. One of the following centres can reduce the inspiratory duration
upon stimulation
a. Medullary inspiratory centre
b. Pneumotaxic centre
c. Apneustic centre
d. Chemosensitive centre
Option (b) is the answer.