Hormonal and neural changes during pregnancy function to facilitate diffusion of gases across the placenta. One way this occurs is by ________ respiration rate, thereby ________ CO₂ levels in the blood. A) increasing; raising B) increasing; lowering C) decreasing; raising D) decreasing; lowering

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During pregnancy, the respiration rate increases to help lower CO2 levels in the blood, facilitating gas exchange across the placenta.

Hormonal and Neural Changes During Pregnancy Function to Facilitate Diffusion