Concept #1: The Three Body Fluid Compartments
Concept #2: Exchange Between the Plasma and ISF
Concept #3: Exchange Between the ISF and Cytosol
Practice: Albumin is a protein in the blood. In which of the following body fluid compartments will you find albumin? (Choose all that apply.)
Practice: “Third-spacing” is the medical term for accumulation of fluid outside of both the body cells and the blood vessels. So, third-spacing is the accumulation of fluid in the:
Practice: Testosterone is a steroid hormone. As a steroid, it is small, non-polar, and lipophilic. In which body fluid compartments do you expect to find testosterone?
Practice: Inulin is a small polysaccharide that is capable of crossing capillary walls but not cell membranes. You want to measure a patient’s body fluid volume. You inject inulin into their blood, let it mix, then draw a sample and measure the new concentration. You do some fancy calculations and determine that the inulin was mixed into a volume of 20 L. Which body fluid compartment(s)’ volume(s) did you measure? (Choose all that apply).