The membrane potential at which an action potential is triggered is known as the
a. resting potential
b. threshold.
c. absolute refractory period.
d. relative refractory period.
b
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Being overweight or obese in childhood is related to an increased risk of which disease in adulthood?
a. asthma c. coronary heart disease b. dementia d. hepatitis
Thirteen-year-old Juan has had his first ejaculation. This is
a. a sign of complete sexual maturation. b. called spermarche. c. this is a clear-cut marker of the onset of sexual maturity. d. called menarche.
Dissociative identity disorder can include identities that are different in age, race, gender, or sexual orientation
Indicate whether the statement is true or false
Throughout the day, activities in the liver, kidneys, and endocrine glands undergo large changes. Body temperature, blood pressure, and amino acid levels also shift from hour to hour. In fact, people tend to be more energetic and alert when these and other activities are at their highest point once a day. This is a description of
a. the Yerkes-Dodson law. b. sensation-seeking patterns. c. circadian rhythms. d. biological condensation.