Capillary Exchange II: Bulk Flow and the Starling Equation of Ultrafiltration

Practice: Which of the following variables in the Starling Equation favor flow out of the capillary into the interstitial space? (Choose all that apply.)

Practice: A 23-year-old man is admitted to the hospital for an appendectomy. As part of the procedure he is given an intravenous infusion of normal saline (basically the same as blood plasma, with the same concentrations of all solutes as normal blood plasma). A mistake is made and the man is given 3 L of fluid, causing a huge increase in his blood plasma volume. Which of the following Starling Equation variables will be directly affected by this increase in plasma volume and how will it affect net bulk flow? (Recall that a positive value of Φ corresponds to net outward flow of fluid from the capillary to the interstitial space.)