Respirations are initiated at birth as a result of:
a. An increase in the PO2 and a decrease in PCO2.
b. The continued functioning of the foramen ovale.
c. Chemical, thermal, and mechanical factors.
d. Drying off the infant.
C
A variety of these factors are responsible for initiation of respirations.
The PO2 decreases at birth and the PCO2 increases.
The foramen ovale closes at birth.
Tactile stimuli aid in initiating respirations, but are not the main cause.
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