Assume for simplicity that red blood cells (RBC) contain only solutes to which the RBC membrane is impermeable.

Ed Rivers a third-year medical student was alone in the hospital emergency room one night. It was Show more Ed Rivers a third-year medical student was alone in the hospital emergency room one night. It was unusually quiet in the ER so the residents were getting some much-needed sleep. A patient Ms. B. was brought in showing signs of serious dehydration. Ed tried to give her water but she vomited. Feeling that he must try something else and not wanting to wake the residents he administered 1 liter (L) of sterile distilled water intravenously (IV). The questions that follow are aimed at determining the consequences of Eds action. Assume for simplicity that red blood cells (RBC) contain only solutes to which the RBC membrane is impermeable. The osmolarity of the RBC the concentration of solute particles is 300 mOsm/L. Predict the direction of change (Increase Decrease No Change) you would expect Eds infusion to have produced on and explain the reasoning for your answer a)(2 points) Ms. Bs plasma osmolarity after the infusion ___________________________. b)(2 points) Ms. Bs RBC volume after the infusion equilibrates with blood ____________________. (In both cases be sure to explain your answer). Ms. B. got much worse after Eds treatment so the head resident was called in. She drew blood from the patient and centrifuged it. The denser RBCs were forced to the bottom of the tube. The supernatant plasma was PINK! a)(2 points) Why was the patients plasma pink? b)(2 points) After seeing the supernatant the Head Resident gave the patient glucose. Why would this help? Show less

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