When the critical hormone __________ is released in high enough concentration by the mother's pituitary gland, the uterus begins periodic contractions

Parents of newborn babies often complain about being chronically tired, because their infants' crying, feeding, and diaper changes interrupt their sleep nightly. After many nights, they develop what is known as _____.

Fill in the blank(s) with the appropriate word(s).

Risa experiences sudden, temporary interruptions of breathing during sleep. Risa's condition is known as _______

a. a night terror b. insomnia c. sleep apnea d. narcolepsy