Sixteen-year-old Johnny is having difficulty getting to sleep at night. He tries to fall asleep but doesn't feel tired. This is most likely an example of
A) an early wake phase.
B) a decreased alertness phase.
C) a lack of sleep preference.
D) a delayed phase preference.
D) a delayed phase preference. As adolescents go through puberty, circadian rhythms that help regulate many of the body's systems (including the sleep/wake cycle) change to a delayed phase preference—so teens simply aren't sleepy until later at night.
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In what terms are mental disorders defined?
A. when a person is out of contact with reality B. persistent maladaptive behaviors C. inconsistent, socially unacceptable behaviors D. unrealistic beliefs
When a child is conceived, the egg and sperm cell join to create a complete genetic map of everything that baby will become. This "genetic blueprint" that determines our lifelong traits and characteristics is called a __________
a. karyotype b. phenotype c. genotype d. chromotype