A synapse is a tiny gap that separates the axon of one neuron, and the dendrite of another neuron.

A synapse is a tiny gap that separates the axon of one neuron, and the dendrite of another neuron.

• A. A tiny gap that separates the axon of one neuron, and the dendrite of another neuron.
• B. A region where neurotransmitters are released into the bloodstream
• C. The insulating fatty layer around a neuron
• D. A region of the brain responsible for memory

Answer: (A)

A synapse is the junction where nerve signals pass from one neuron to the next, and it is defined by a tiny gap between the sending neuron's axon and the receiving neuron's dendrite or cell body. Communication across this gap happens mainly through chemicals called neurotransmitters released from the presynaptic terminal into the synaptic cleft; these neurotransmitters then bind to receptors on the postsynaptic membrane to influence whether the next neuron fires an action potential. This setup allows precise, directional signaling and modulation of neural circuits. The description that fits is the one stating there is a tiny gap that separates the axon of one neuron from the dendrite of another neuron. The other statements describe processes or structures that are not synapses: releasing neurotransmitters into the bloodstream relates to endocrine signaling, the insulating fatty layer is the myelin sheath, and a region of the brain responsible for memory points to a brain structure like the hippocampus.

A synapse is the junction where nerve signals pass from one neuron to the next, and it is defined by a tiny gap between the sending neuron's axon and the receiving neuron's dendrite or cell body. Communication across this gap happens mainly through chemicals called neurotransmitters released from the presynaptic terminal into the synaptic cleft; these neurotransmitters then bind to receptors on the postsynaptic membrane to influence whether the next neuron fires an action potential. This setup allows precise, directional signaling and modulation of neural circuits.

The description that fits is the one stating there is a tiny gap that separates the axon of one neuron from the dendrite of another neuron. The other statements describe processes or structures that are not synapses: releasing neurotransmitters into the bloodstream relates to endocrine signaling, the insulating fatty layer is the myelin sheath, and a region of the brain responsible for memory points to a brain structure like the hippocampus.