Axon terminal is the endpoint of a neuron where neurotransmitters are stored.

Axon terminal is the endpoint of a neuron where neurotransmitters are stored.

• A. The endpoint of a neuron where neurotransmitters are stored.
• B. The gap between neurons
• C. The region of the neuron that receives information
• D. The cell body

Answer: (A)

The main idea here is how chemical signals are released at the synapse. The axon terminal is the endpoint of the neuron where neurotransmitters are stored in small sacs called synaptic vesicles. When an action potential reaches this terminal, calcium ions trigger these vesicles to fuse with the membrane and release their neurotransmitters into the synaptic cleft. The molecules then diffuse across the gap and bind to receptors on the neighboring neuron, influencing whether that neuron fires. The other descriptions point to different parts of the synapse: the gap between neurons is the synaptic cleft, not a storage site; the region that receives information is typically the dendrites or the postsynaptic area; and the cell body (soma) houses the nucleus and metabolic machinery, not the storage of neurotransmitters.

The main idea here is how chemical signals are released at the synapse. The axon terminal is the endpoint of the neuron where neurotransmitters are stored in small sacs called synaptic vesicles. When an action potential reaches this terminal, calcium ions trigger these vesicles to fuse with the membrane and release their neurotransmitters into the synaptic cleft. The molecules then diffuse across the gap and bind to receptors on the neighboring neuron, influencing whether that neuron fires.

The other descriptions point to different parts of the synapse: the gap between neurons is the synaptic cleft, not a storage site; the region that receives information is typically the dendrites or the postsynaptic area; and the cell body (soma) houses the nucleus and metabolic machinery, not the storage of neurotransmitters.