Many neurons contain and release two neurotransmitters. This situation is called
A) covalence.
B) ionotropism.
C) cohabitation.
D) metabotropism.
E) coexistence.
Question 2
The release of neurotransmitter molecules from buttons is often triggered by
A) an efflux of sodium ions.
B) an influx of calcium ions.
C) the sodium-potassium pump.
D) the arrival of an AP at the axon hillock.
E) the release of calcium ions from the buttons.