Which of the Following Statements Apply To $\dot V$ _E?
I $\dot V$

Multiple Choice

Which of the following statements apply to $\dot V$ _E?
I.Normal people increase $\dot V$ _E by raising both the tidal volume and respiratory rate.
II.Early in exercise a higher tidal volume produces most of the increase in $\dot V$ _E.
III.Early in exercise a respiratory rate produces most of the increase in VE.
IV.After approximately 60% to 70% of the vital capacity is reached, tidal volume plateaus, and increased respiratory rate is responsible for additional VE increases.

A) I, II
B) I, III, IV
C) I, II, III, IV
D) I, II, IV