Neuron parts and the synapse
Fri, Mar 12, 2027 · Week 8 · Human Anatomy & Physiology (Human Body Systems)
Today's goal: Label the parts of a neuron and explain how a signal crosses a synapse.
What a finished product looks like
This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.
Labeled neuron (signal travels left to right):
- Dendrites: receive incoming signals.
- Cell body (soma): integrates the signals.
- Axon: conducts the action potential away from the cell body.
- Myelin sheath: insulates the axon and speeds conduction.
- Axon terminal: releases neurotransmitter.
Signal-direction arrow: dendrites to cell body to axon to axon terminal.
Synapse explanation (two sentences): When the electrical signal reaches the axon terminal, it triggers the release of neurotransmitter molecules into the synaptic cleft, the tiny gap between the two neurons. The neurotransmitter crosses the gap and binds to receptors on the next neuron's membrane, which converts the chemical message back into an electrical signal in that cell.
Also due today: Submit a photo of your dated notebook page.
WebXam problem for today's skill
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.