The Concentration or Quantity of a Neurotransmitter in Each Vesicle

Multiple Choice

The concentration or quantity of a neurotransmitter in each vesicle

A) is constant across all neurons for a given neurotransmitter.
B) is constant for vesicles using a given transport protein.
C) may vary between neurons, but is constant within a neuron for a given neurotransmitter.
D) may vary based on availability of the transmitter and concentration of chloride ions.
E) may vary based on the availability of enzymes used in synthesis.