Sickle-cell anemia is caused by:
A) a chromosomal abnormality.
B) a single segment found only on the Y chromosome.
C) a recessive gene.
D) a decrease in estrogen levels.
C
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During __________ sleep, emotional centers in the brain become activated, and blood pressure, heart rate, and body temperature increase; during __________ sleep, body temperature, heart rate, and blood pressure decrease.
A. NREM; REM B. REM; NREM C. NREM Stage 3; REM D. NREM Stage 4; REM
Phonological awareness allows a child to
a. apply a sound to an object. b. segment spoken words into sounds. c. understand the meaning of words. d. realize that some letters are commonly grouped together (e.g., "ed").
A pediatric nurse strokes the bottom of a newborn's foot, and the toes fan upward. Which reflex was elicited, and what does it tell us about the baby's health?
a) The startle response tells us the baby may have a hearing deficit. b) The Moro reflex suggests the baby needs immediate medical attention. c) The Babinski reflex suggests the baby has a normal central nervous system. d) The rooting reflex tells us the baby probably suffered central nervous system damage.
Although early maturation is largely a plus for boys, there are drawbacks. All of the following are drawbacks to early maturation in a boy EXCEPT __________
a) greater difficulties in school b) higher risk of becoming involved in delinquency, possibly in the company of older boys c) greater likelihood of becoming involved in substance abuse d) earlier maturity in nonverbal cognitive development