Neuron Function Worksheet With
Complete Solution 2023
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 do 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 opened
