Add the following matrices:

Endocrine glands ___________

a) secrete hormones directly into the bloodstream b) are chemicals released into the bloodstream c) are an extensive network of specialized cells d) are a thin layer of cells coating the axons

Tim's parents brought him to a psychological clinic when he was 5 years old. The clinician's

assessment shows that he currently meets diagnostic criteria for severe mental retardation and autism. However, Tim's parents report that he was a "normal little boy" until 6 months ago. Then, over a period of a few weeks, many aspects of his behavior deteriorated very rapidly. Which of the following diagnosis best fits this description of Tim's symptoms: a. Autism b. Asperger's disorder c. Rett's syndrome d. Childhood disintegrative disorder e. Childhood-onset schizophrenia