________ is the concern over being judged by others in your group based on your performance.

One of the main ways that drugs can affect neurotransmitter systems is by cutting off blood flow to a specific brain structure

Indicate whether the statement is true or false

Which of the following is true regarding heredity and longevity and health?

A) Twin studies show that illness rates in siblings do not have a genetic component. B) Of those whose parents died before 78, 40% had a chronic illness at age 65. C) Of those whose oldest grandparent had lived past 90, only about 2% had a chronic illness at age 65. D) Identical twins are more similar in longevity than are fraternal twins.