The return of essential substances to the blood is called ______

Upright posture requires minimal muscular activity, but only if the body masses align as close to the ___________ _________________ (two or three words) as possible

Fill in the blank(s) with the appropriate word(s).

Diarrhea and vomiting can cause dehydration in pediatric patients, leading to:

A) Reduced drug effects and lower drug concentrations. B) Amplified drug effects and higher drug concentrations. C) Water-soluble drugs crossing the blood–brain barrier. D) Noncompliance in medication regimes.