IB Sport Science Topic 2 Prep Exam Questions Fully Answered.
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Course
IB Sports
Institution
IB Sports
The principle structures of the ventilatory system - Answer Nose, mouth, pharynx, larynx, trachea, bronchi, bronchioles, lungs and alveoli
Functions of the conducting airways - Answer Low resistance pathway for airflow, defence against chemicals and other harmful substances inhaled, warmin...
IB Sport Science Topic 2 Prep Exam
Questions Fully Answered.
The principle structures of the ventilatory system - Answer Nose, mouth, pharynx, larynx, trachea,
bronchi, bronchioles, lungs and alveoli
Functions of the conducting airways - Answer Low resistance pathway for airflow, defence against
chemicals and other harmful substances inhaled, warming and moistening the air
Pulmonary Ventilation - Answer Inflow and outflow of air between the atmosphere and the lungs
Total lung capacity - Answer Volume of air in the lungs after maximal inhalation
Vital capacity - Answer Maximum volume of air that can be exhaled after a maximum inhalation
Tidal Volume - Answer The volume of air breathed in and out in any one breath
Expiatory reserve volume - Answer Volume of air in excess of tidal volume that can be exhaled forcibly
Inspiratory reserve volume - Answer Additional inspired air over and above tidal volume
Residual volume - Answer Volume of air still contained in the lungs after maximal exhalation
Mechanics of ventilation - Answer Diaphragm contracts, internal intercostals contract, ribs move
upwards and outwards. Diaphragm relaxes, external intercostals contract, ribs move downwards and
inwards.
Nervous and chemical control of ventilation during exercise - Answer Increase in ventilation as a result
of a increase in blood acidity due to an increase of CO2 detected by the respiratory centre. Results in
deeper respiration and an increase in ventilation.
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