ABSTRACT
Dynamic lung function tests measure forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC). In obstructive diseases FEV1/FVC reduces; in restrictive conditions it increases.
8a. T 8b. F 8c. T 8d. T The Hb/O2 dissociation curve, when shifted to the right (a decreased affinity for oxygen), releases oxygen more readily to metabolically active tissue. Shifts to the right occur with raised CO2, raised 2,3-DPG (2,3-diphosphogycerate),
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shifts to the left (an increasing affinity for oxygen) occur with fetal Hb (enhancing placental oxygen uptake), decreased CO2, decreased temperature, decreased 2,3-DPG and increased pH. The presence of carbon monoxide increases the affinity of Hb for oxygen but does not release it to the tissues.
