Neurotransmitters
A) are stored in synaptic vesicles.
B) are chemical signals released by neurons.
C) are released from the axon via exocytosis.
D) bind to receptors on target cells.
E) have all of these characteristics.

Question

Quizplus · Accepted Answer

Neurotransmitters are stored in synaptic vesicles within the axon terminal. When an action potential reaches the terminal, these vesicles release the neurotransmitter into the synaptic cleft where they act as chemical signals to communicate with other neurons, muscles or glands. The release occurs via exocytosis, and the neurotransmitter binds to receptors on the target cell, leading to a response or inhibition of a response, depending on the type of neurotransmitter and receptor. Therefore, all the given choices are characteristics of neurotransmitters.