<prompt> The conducting airways are referred to as the anatomic dead space. TRUE about measurement of anatomical dead space is:1 mL of dead space per pound of ideal body weight5 mL of dead space per pound of ideal body weight10 mL of dead space per pound of ideal body weight15 mL of dead space per pound of ideal body weight  <response>: For a normal, healthy subject, the anatomic dead space can be estimated by referring to a table of standard values matched to sex, age, height, and weight or body surface area. A reasonable estimate of anatomic dead space is 1 mL of dead space per pound of ideal body weight. To determine the anatomic dead space in a paicular patient, Fowlers method is used. Ref: Levitzky M.G. 2007. Chapter 3. Alveolar Ventilation. In M.G. Levitzky Ed, Pulmonary Physiology, 7e. 