Neuron function worksheet

what is the job of a neuron - Answer- to move an electrical signal from one place to another in order to send sensory messages throughout the body Which of the gated embedded proteins in Model 1 allow sodium ions ( O ) through the membrane? - Answer- gates A, B, D and F allow sodium ions through the membrane Which of the gated embedded proteins in Model 1 allow potassium ions ( triangles ) through the membrane? - Answer- Gates C, E, and G allow potassium ions through the membrane The neuron illustrated in Model 1 has received a signal from either a sensory cell (taste bud, skin cell, retinal cell, etc.) or from another neuron. What evidence do you find in diagram 1 of the model that indicates a signal has been received? - Answer- A signal Ligand has bound to the ligand-gated embedded protein and the gate has opened In diagram 2 of Model 1, gated embedded protein B has opened. Was this opening triggered by the arrival of a signal ligand? If no, propose an alternate stimulus that might have triggered the gate to open. - Answer- No, diagram 2 does not show a ligand bound to embedded protein B. The gate may have opened because of the change in membrane potential from the flood of ions nearby When a signal moves down the axon of the neuron, which direction do sodium ions move through the voltage-gated embedded proteins? - Answer- sodium ions move into the cell