________ is a strong candidate to act as a retrograde messenger from the dendrite to the terminal button.
A) Norepinephrine
B) Nitric oxide
C) Nitrous oxide
D) Glutamate
E) NMDA

Question

Quizplus · Accepted Answer

Nitric oxide is a gas that can diffuse freely across cell membranes and is thus able to travel from the dendrite to the terminal button, making it a strong candidate for retrograde messenger signaling. Norepinephrine and glutamate are neurotransmitters that typically act as forward messenger signaling from the terminal button to the dendrite. Nitrous oxide is not a neurotransmitter, but rather a commonly used anesthetic. NMDA is a subtype of glutamate receptor, not a neurotransmitter itself.

________ Is a Strong Candidate to Act as a Retrograde