The second leading cause of death in middle childhood is

Following release from the presynaptic cell, neuropeptides a. cannot be deactivated by enzymes, whereas small-molecule transmitters diffuse away or are deactivated by reuptake. b. are deactivated by reuptake, whereas small-molecule transmitters diffuse away or are deactivated by enzymes. c. can diffuse away from synapses, whereas small-molecule transmitters are deactivated by reuptake

d. and small-molecule transmitters can be deactivated by diffusion, enzymes, or reuptake.

The fact that DSM-IV-TR diagnoses can be based on a variety of assessment methods increases

a. the reliability of the diagnoses. b. the number of diagnoses included in the manual. c. the heterogeneity of any one diagnostic category. d. all of the above