In the acronym LUNAR, the A stands for:

Which of the following is true of a healthy stride and gait?

a. The torso should be vertical and the shoulders should be level through the stride. b. The arms should swing freely along the sides of the body. c. The hips should move freely, rocking evenly on both sides with each stride. d. The knees should extend but not lock during the step. e. All of the above are true of a healthy gait.

Positively charged ions, such as sodium ions in extracellular fluid, are referred to as:

A) protons B) neutrons C) cations D) anions