For most children, ________.

The aortic valve is __________ during systole. 

Which statement about individual differences in motor skills during early childhood is true?

Four year old Eleanor can probably ________

Low-cost supplements of ________ substantially reduce the incidence of severe and prolonged diarrhea.

Which statement about nocturnal enuresis is true?

Compared to 4- and 5-year-olds, 8- and 10-year-olds have________.

Which factor plays the largest role in accounting for boys’ superiority in gross-motor skills?

The hippocampus plays a vital role in ________.

Sophia’s parents will not allow her to eat any sugary foods. This practice will most likely ________.