Private speech helps children to __________

The capacity of a placebo treatment to reduce pain perception is due to

a. release of endorphins in the brain. b. inactivation of cells in the occipital cortex. c. the release of naloxone in the spinal cord. d. damage by needles to skin receptors. e. B and D are correct.

In women, ova are formed:

a. about one every day after reaching puberty b. about one or two a month, every month after reaching puberty c. about 100 every day after reaching puberty d. during the prenatal period