Which of the following substances is not a neuropeptide?
A. oxytocin
B. adenosine
C. vasopressin
D. insulin
Answer: B
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Slowing of reaction time is usually quite significant after a person reaches middle age.
Answer the following statement true (T) or false (F)
African-American adolescents constitute ____ of the adolescent population in the United States, yet account for ____ of those arrested for violent crime
a. 10%? 25% b. 25%? 12% c. 8%? 30% d. 13%? 50%
Contemporary theorists interpret motor development as
a. a product of maturation with experience having little influence. b. resulting from operant conditioning. c. following an explicitly developmental systems model. d. an evolution from reflexes to conscious movements.
Why is it so difficult for many toxins and poisons to penetrate the blood-brain barrier?
a. Because the human immune system has killer t-cells that attack such foreign agents. b. Because those agents are too large to get out of the human blood stream. c. Because the presence of such invaders triggers a fever, which kills them. d. Because those agents are not soluble in fat.