Which of the following is true of glycine?
A) The glycine receptor opens sodium channels and thus induces IPSPs.
B) Lockjaw is produced by an excess amount of glycine in the brain.
C) Glycine is an excitatory neurotransmitter in the peripheral nervous system.
D) The toxicity of strychnine results from its activation of glycine receptors.
E) The glycine receptor is ionotropic.
Answer: E
Rationale: The glycine receptor is ionotropic.
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