Which of the following are not direct tests of the brain, but are subtle outward behavioral signs of nervous system dysfunction that have been used to diagnose problems ranging from childhood learning disorders to psychosis?

What -if propositions require

concrete thought. operational thought. postformal thought. hypothetical thought.

Which of the following are true of neurotransmitters

a. they are stored in presynaptic neurons b. each transmitter has its own shape receptor c. they are ejected from the post-synaptic neuron and then broken down or re-uptaken d. some of the above e. all of the above