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⫸ Teratogens. Answer: agents, such as chemicals and viruses, that can
reach the embryo or fetus during prenatal development and cause harm
⫸ teratology. Answer: study of birth defects
⫸ NBAS (Neonatal Behavioral Assessment Scale). Answer: evaluates the
baby's reflexes, muscle tone, state changes, responsiveness to physical and
social stimuli, and other reactions
⫸ Babinski reflex. Answer: Reflex in which a newborn fans out the toes
when the sole of the foot is touched
⫸ stepping reflex. Answer: Reflex that causes newborn babies to make
little stepping motions if they are held upright with their feet just touching
a surface
⫸ palmar reflex. Answer: when you place your finger in an infant's palm,
he will grasp it
⫸ brain growth. Answer: Two-year-olds are totally dependent on adults,
but they have already reached half their adult height and three-fourths of
their adult brain size.
, ⫸ spontaneous abortion. Answer: naturally occurring termination of
pregnancy; also known as a miscarriage
⫸ experience-expectant. Answer: Brain functions that require certain basic
common experiences (which an infant can be expected to have) in order to
develop normally.
⫸ experience-dependent. Answer: brain functions that depend on
particular, variable experiences and therefore may or may not develop in a
particular person
⫸ Colostrum. Answer: thin, yellow fluid, precursor of milk, secreted for a
few days after birth
⫸ gross motor skills. Answer: motor skills that involve large-muscle
activities, such as walking
⫸ fine motor skills. Answer: physical skills that involve the small muscles
and eye-hand coordination
⫸ primary circular reactions. Answer: The first of three types of feedback
loops in sensorimotor intelligence, this one involving the infant's own body.
The infant senses motion, sucking, noise, and other stimuli and tries to
understand them.
⫸ secondary circular reactions. Answer: The second of three types of
feedback loops in sensorimotor intelligence, this one involving people and
objects. Infants respond to other people, to toys, and to any other object
they can touch or move.
⫸ object permanence. Answer: the awareness that things continue to exist
even when not perceived