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WorksheetsLC The Breathing System
Total questions: 20
Worksheet time: 18mins
The trachea is kept open by rings of
(a)
Breathing involves 2 stages: inhalation and (a) ?
Contractions of the intercostal muscles and (a) alter the size of the thorax and cause ventilation
Air is moistened, warmed and (a) as it passes through the nose
What is the flap of tissue which prevents food entering the trachea called?
(a)
The hairs lining the air pipes which move the mucus into the oesophagus are called (a) ?
The large surface area needed for gaseous exchange is provided by the (a) ?
The numerous alveoli and capillaries are particularly suited to gas exchange because their (a) are thin
The red pigment (a) carries about 97% of the oxygen in our red blood cells
The ribs move up and out while the diaphragm contracts. This active action causes.............?
inhalation
exhalation
diffusion
Breathing rate is controlled by the concentration of ................... dissolved in blood?
Oxygen
Carbon dioxide
Nitrogen
Water vapour
The percentage of oxygen in exhaled air for a person at rest is
16%
21%
Which contains the greater percentage of water vapour – inhaled air or exhaled air?
inhaled
exhaled
During an asthma attack the (a) narrow or constrict causing a feeling of breathlessness.
Which of the following is more likely to cause an asthma attack in a sensitive person – food colouring or cat dander?
food colouring
cat dander (fur)
Where in the body is the concentration of carbon dioxide monitored?
(a)
Exercise increases the (a) and depth of breathing.
During (a) the thorax/chest cavity gets smaller causing an increase in pressure and air to be forced out.
Oxygen d (a) from the alveoli into the blood and from the blood into the body cells.
Each lung is enclosed by a pair of (a) membranes, which are separated by a cavity.
