The tendency for pigeons to peck at a light that has been associated with the noncontingent delivery of food is referred to as:
A) ?negative automaintenance.
B) ?autopecking.
C) ?schedule-induced pecking.
D) ?autoshaping.
D
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As compared with girls, boys' physical activity level
a. is equal at birth but increases at a faster rate. b. makes them avoid nonaggressive rough-and-tumble play. c. is higher but only for boys who have sisters at home. d. is higher at all ages.
________ remove dead neurons and waste products from the nervous system, nourish and insulate neurons, and direct their growth
a. Schwann cells c. Glial cells b. Neurons d. Myelin sheaths
Which of the following is probably not a biological cause of affective disorders?
A. Imbalances in the brain's neurotransmitters B. Abnormally low levels of the stress hormone cortisol C. Defects in brain regions involved in mood D. Malfunctions of the endocrine system
During the migration stage of nervous system development:
a. The cells migrate inward to the core of the brain, which is the last part to develop b. Each neuron is coded for a specific function during proliferation c. Development of all areas begins at the same time d. There is considerable flexibility