Question

Neurotransmitters are stored in an axon's:

a) Myelin sheath
b) Synaptic cleft
c) Nucleus
d) Mitochondria

Answer 1

Neurotransmitters are stored in synaptic vesicles within axon terminals and released into the synaptic cleft to transmit signals to other neurons.

Step-by-step explanation:

Neurotransmitters are stored in the axon terminals of neurons, within structures known as synaptic vesicles. When an action potential reaches the axon terminal, it triggers the release of these neurotransmitters into the synaptic cleft, a small gap between the neurons. The neurotransmitters then bind to receptors on the postsynaptic neuron, triggering a response. This starts an action potential in the other neuron or cell. Therefore, neurotransmitters are stored in the axon's synaptic vesicles, not in the myelin sheath, nucleus, or mitochondria.