IB Sport Science: Topic 2 Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: Mechanics of ventilation
Answer:
Diaphragm contracts, internal intercostals contract, ribs move
upwards and outwards. Diaphragm relaxes, external intercostals contract, ribs move
downwards and inwards.
Q: 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.
Q: Lung stretch receptors, muscle proprioceptors and chemoreceptors.
Answer:
, IB Sport Science: Topic 2 Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: The role of haemoglobin
Answer:
Most of the oxygen in the blood os transported by haemoglobin as
oxyhemoglobin within red blood cells
Q: Gaseous exchange.
Answer:
Occurs in alveolus and capillary. Crosses a layer of fluid and through the
epithelial cell and base membrane of the alveolus. Then it crosses the connective
tissue.
Crosses the base membrane of the capillary and through the endothelial cells into the
blood
stream where it binds with haemoglobin
Q: Composition of blood
Answer:
Platelets, erythrocytes, leucocytes and plasma.
Solutions | Latest 2026 Update
Q: Mechanics of ventilation
Answer:
Diaphragm contracts, internal intercostals contract, ribs move
upwards and outwards. Diaphragm relaxes, external intercostals contract, ribs move
downwards and inwards.
Q: 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.
Q: Lung stretch receptors, muscle proprioceptors and chemoreceptors.
Answer:
, IB Sport Science: Topic 2 Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: The role of haemoglobin
Answer:
Most of the oxygen in the blood os transported by haemoglobin as
oxyhemoglobin within red blood cells
Q: Gaseous exchange.
Answer:
Occurs in alveolus and capillary. Crosses a layer of fluid and through the
epithelial cell and base membrane of the alveolus. Then it crosses the connective
tissue.
Crosses the base membrane of the capillary and through the endothelial cells into the
blood
stream where it binds with haemoglobin
Q: Composition of blood
Answer:
Platelets, erythrocytes, leucocytes and plasma.
