WorksheetsHuman respiratory system
Total questions: 10
Worksheet time: 5mins
The alveoli contain specialised cells that secreted phospholipoprotein complex known a pulmonary surfactant. The function of pulmonary surfactant is:
To provide some rigidity to the alveoli m prevent lung collapse.
To decrease the surface tension of the alveoli, making it easier to expand them
To facilitate the diffusion of O2 and CO2 by providing protein channels through which these gases flow.
To provide a sticky surface upon which dust and microbes are trapped and disposed of
The function of nasal cavity and nasopharynx is to:
Warm the inspired air.
Moisten the inspired air.
Filter out the dust particles from the inspired air.
All of the above
The covering of lungs is called:
Pleura
Pericardia
Peritoneum
Mediastinum
When the carbon dioxide concentration in blood increases, the rate of breathing will:
Remain unaffected
Decrease
Stop
Increase
In an old science fiction movie, the hero tried to drown a giant ant by holding its head under water. Would this work? Why?
Yes, Ants use lungs to breathe much as we do.
Yes, The skin surface, covered with water, could not get O2 from the air.
No, Ants use gills for respiration, like crabs do.
No, Ants breathe through holes in the sides of their bodies.
In which of the following animals respiration occurs without a respiratory organ?
Fish
Cockroach
Tadpole
Earthworm
Opening to the trachea is covered by a small flap of tissues termed as the ______.
Glottis
Trachea
Epiglottis
Larynx
The trachea divides into two smaller tubes called ______.
Bronchi
Trachea
Microtrachea
Eustachian tubes
Inner surface of the bronchi, bronchioles and fallopian tubes are lined by
Cubical epithelium
Columnar epithelium
Squamous epithelium
Ciliated epithelium
Which one of the following statement is NOT correct regarding trachea?
It usually lies posterior to the muscular esophagus.
It splits into the right and left bronchi to supply air to the lungs
Opening to the trachea is covered by epiglottis.
Tracheal rings are C-shaped
