Carbohydrates provide ________ calories of energy for every gram of carbohydrate.

________ are the cells within a bone that help maintain normal bone structure by recycling calcium salts

A) Osteocytes B) Osteoclasts C) Osteoblasts D) None of the above

When the flow-metering device of a home liquid O2 system is turned on, O2 leaves the container through a vaporizing coil, where it is heated by exposure to which of the following?

a. Hot water b. Ambient air c. Electrical energy d. Ultrasound