What is unique about the mental retardation caused by PKU?
What will be an ideal response?
While many conditions inevitably result in brain damage and mental retardation, early
detection of PKU can prevent any adverse consequences. Children with PKU are unable to
metabolize phenylalanine. If they ingest food with this amino acid, it accumulates and
causes brain damage that leads to retardation. The mental retardation seen in PKU only
occurs if foods with phenylalanine are ingested, therefore it is preventable.
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Which of the following statements about REM sleep is FALSE?
a) The eyes move rapidly back and forth under the eyelids. b) Most people report that they were dreaming if awakened. c) The body is aroused and brain waves resemble waking beta waves. d) Lack of REM sleep produces psychological disorders.
The number of C-section births has increased over time from ____ in 1965 to ____ today
a. 5 percent; 31 percent c. 10 percent; 29 percent b. 5 percent; 39 percent d. 10 percent; 39 percent