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🔬 Biology  ·  Neural Control and Coordination  ·  NEET

Glutamate is the main _____ neurotransmitter in the CNS:

Answer: Excitatory (NMDA, AMPA receptor activation).

  • A Inhibitory, hyperpolarizing postsynaptic neurons via GABA receptors
  • B Excitatory (NMDA, AMPA receptor activation)
  • C Modulatory mainly, acting through slow second-messenger pathways
  • D Peripheral mainly, restricted to neuromuscular junctions

Correct answer: B. Excitatory (NMDA, AMPA receptor activation)

Explanation: Glutamate is the main excitatory neurotransmitter in the CNS. It activates NMDA and AMPA receptors and is critical for learning.

Labeled diagram of a neuron showing dendrites, cell body (soma) with nucleus, axon, myelin sheath, Nodes of Ranvier, and axon terminals

Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.

Concept context

Brain, spinal cord, neurons, reflex arcs, and sense organs.

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