Body plethysmography uses a modification of which law to indirectly measure gas volume within the lungs?

At ________ months, an infant should be able to reach for and hold objects

a. five to six b. six to seven c. seven to eight d. eight to nine

Patients who have internal bleeding may show signs such as:

A. the inability to use the bathroom. B. becoming very hot and sweaty. C. an increasingly urgent thirst for cool liquids. D. vomiting of substance that looks like coffee grounds.