In Bronfenbrenner's bioecological theory, my immediate family, my job, and my dogs are all part of my ________

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.

Which of the following parenting styles generally has the worst effect on children?

a. Authoritative b. Uninvolved c. Indulgent d. Authoritarian