Lecture 10 Ventilation In Children

Question 1

During childhood, increases in absolute minute ventilation at rest are driven by what?

a) Increases in absolute tidal volume
b) Increases in breathing frequency
c) Increased inspiratory reserve volume
d) Increásed residual volume

Answer 1

a) Increases in absolute tidal volume

Question 2

When considering maximal exercise, what happens to the breathing frequency to tidal volume ratio as children grow?

a) It is unchanged.
b) It increases, i.e. greater dependence on increases in breathing frequency during exercise.
c) It falls, i.e. greater dependence on increases in tidal volume during exercise.
d) This information is not known.

Answer 2

c) It falls, i.e. greater dependence on increases in tidal volume during exercise

Question 3

Why might the energy demands of ventilation during exercise be greater in small children compared with older children or young adults?

a) Greater lactate production
b) Greater dead space ventilation
c) Greater lung compliance
d) Greater airway resistance

Answer 3

d) greater airway resistance