Timing as an ability is typically specific to the requirements of the skill being performed.

Which of the following techniques are used to measure residual volume? 1. Helium dilution 2. Body plethysmography 3. Nitrogen washout 4. Flow-volume loops

a. 2 and 4 only b. 1, 2, and 3 only c. 1, 2, 3, and 4 d. 1, 3, and 4 only

Red blood cells carry ________ molecules.

A. plasma B. fibrinogen C. heparin D. hemoglobin