HMS, BM EQ-Bank 53 MC

During steady-state running, which statement correctly identifies how the respiratory and circulatory systems structure enables oxygen delivery to working leg muscles?

Bronchioles constrict while capillaries dilate in muscles
Alveoli and surrounding capillaries maximize gas exchange
Airways narrow while blood vessels expand in lungs
Bronchi expand while blood flow decreases to muscles

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\(B\)

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Consider Option B: Alveoli and surrounding capillaries maximize gas exchange

Correctly shows the structural relationship enabling efficient gas exchange

Incorrect Options:

A: Bronchioles don’t constrict during exercise
C: Airways don’t narrow during exercise
D: Blood flow increases not decreases to muscles

\(\Rightarrow B\)