Leuk/o is the combining form for cell

Which of the following statements is not true about muscle approximation?

a. Muscle approximation involves slowly pushing the two ends of a muscle together to shorten it, then slowly lengthening the muscle. b. The approximation motion mechanically simulates the shortening that occurs during contraction, which produces a relaxation response. c. It is probable that the spindle fibers register the shortened position, which triggers a resetting of the muscle length by inducing a relaxation response. d. Muscle approximation is a technique used to increase the strength of an inhibited or stretch-weakened muscle.

__________ the abbreviation for human chorionic gonadotropin, also known as the "pregnancy hormone"; measured to identify the gestation stage of pregnancies

Fill in the blank with correct word.