________ Hormones are chemical messengers produced by the heart and transported to target tissue by the bloodstream

How should the therapist instruct a patient to perform a Valsalva maneuver for the assessment of respiratory mechanics?

A. Have the patient pant rapidly just above and below normal tidal breathing for 12 seconds. B. Instruct the patient to exhale as rapidly and as forcefully as possible against a closed glottis for several seconds. C. Teach the patient to perform an inspiratory maneuver, similar to sucking on a straw, for several seconds. D. Coach the patient to breath hold for approximately 10 seconds.

Which is one of the steps of calculating medication problems using ratios and proportions?

a. Add all the values together and subtract the required drug dosage. b. Divide each value by 2 and add the first two values together. c. Multiply extreme values and multiply the means. d. Ratios and proportions are not used to calculate medication problems.