Which of the following neurotransmitters is paired with its correct description?
A. Glutamate; excitatory transmitter, is important in learning and development.
B. Dopamine; inhibitory transmitter, increases attention to sensory information.
C. GABA; excitatory transmitter, modulates neural activity in the CNS.
D. Acetylcholine; excitatory transmitter, affects mood, arousal, and pain perception.
E. Both A and C
ANS: A
Rationale: Glutamate is the principle excitatory transmitter of the CNS and is important in eliciting the neural changes associated with learning and development. Dopamine is an excitatory neurotransmitter that affects motor activity, cognition, pleasure, and reward behavior. GABA is the principle inhibitory transmitter in the CNS, preventing neural overactivity, particularly in the spinal cord. Acetylcholine is the major neurotransmitter in the peripheral nervous system (PNS), regulating the control of movement and autonomic function. In the CNS, ACh is involved in the selection of objects for attention.
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