Although Both Type I and Type II Vestibular Hair Cells

Multiple Choice

Although both Type I and Type II vestibular hair cells release glutamate onto afferent endings and acetylcholine onto the Type II calyces and Type I soma, what determines whether efferent output is excitatory or inhibitory, everything else being equal (species, age, etc.) ?

A) The amount of glutamate released
B) The amount of acetylcholine released
C) The type and amount of calcium channels used
D) The type and amount of potassium channels used
E) The type of cholinergic receptors used