Question 1
Disturbances in sensory neurons will result in an action potential if the
◦ stimulus is graded.
◦ stimulus remains local.
◦ graded stimulus reaches a trigger zone.
◦ localized stimuli do not spread far.
◦ stimuli become downgraded to localized ones.
Question 2
Drug abuse usually involves those drugs which
◦ are psychoactive.
◦ act on the central nervous system.
◦ bind to neuron receptors.
◦ change the chemical messages that neurons send and receive.
◦ all of these