Neuron function worksheet with complete solution

what is the job of a neuron Correct 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? Correct 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? Correct 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? Correct 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. Correct 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 sodium ions move through the voltage-gated embedded proteins? Correct Answer- sodium ions move into the cell when the sodium gates are opened What does the movement of sodium ions across the membrane do to the membrane potential near the open embedded protein? Correct Answer- the membrane potential increases (gets more positive) as the sodium ions move into the cell When a signal moves through the axon of the neuron, which direction do potassium ions move through the voltage-gated embedded proteins? Correct Answer- potassium ions move out of the cell when the potassium gates are op