A 75 year old has lower extremity edema due to congestive heart failure. She is prescribed furosemide, a diuretic that works on the Loop of Henle to reabsorb fluid. How does this help to decrease lower extremity edema? Explain

A 2 month old is brought into the ER following 24hrs of vomiting and diarrhea. What is the concern in a small child? Explain. What kind of symptoms would you expect to see? What might the lab results show? How can it be corrected?