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
...
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
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