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- 1. Multiple ChoiceThe nerve impulse is an electrical current that travels along dendrites or axons.TrueFalse
- 2. Multiple ChoiceThe area between the pre-synaptic cell and the post-synaptic cell is termed the synaptic cleft.TrueFalse
- 3. Multiple ChoiceReceptors that bind the neurotransmitter at the post-synaptic cell membrane are voltage-gated.TrueFalse
- 4. Multiple ChoiceWhen a cell is at rest, the inside is more _____ and the outside is more ______.negative; positivepositive; negative
- 5. Multiple ChoiceThe operation of the sodium-potassium "pump" moves:sodium & potassium ions into the cellsodium & potassium ions out of the cellsodium ions into the cell & potassium ions out of the cellsodium ions into the cell & potassium ions out of the cell
- 6. Multiple ChoiceAfter depolarization what happens to restore resting potential?Sodium channels open & sodium ions diffuse out of the neuron.Potassium channels open & potassium ions diffuse into the neuron.Potassium channels open and potassium ions diffuse into the neuron.Sodium channels open and sodium ions diffuse into the neuron.
- 7. Multiple ChoiceName the ion that is pumped into the axon to maintain resting potential.CalciumHydrogenPotassiumSodium
- 8. Multiple ChoiceWhat describes the phase of quick entry of sodium ions into an axon during an action potential?passive transportdepolarizationion transportrepolarization
- 9. Multiple ChoiceWhat generates a nerve impulse on the post-synaptic membrane?Calcium binding with a receptor sitePotassium leaking into the post-synaptic membraneNeurotransmitter binding with receptor sitesNeurotransmitter being removed from the synapse
- 10. Multiple ChoiceThe nucleus and most of the organelles in a neuron are located in the ______.dendritesaxoncell bodySchwann cells
- 11. Multiple ChoiceFor a neuron with a resting membrane potential at -70mv, an increase in the movement of sodium ions into the neuron's cytoplasm would result in:the depolarization of the neuron.the repolarization of the neuronthe replacement of potassium ions with sodium ions.the replacement of potassium ions with calcium ions.
- 12. Multiple ChoiceNeural transmission across a synaptic cleft is accomplished by:the movement of sodium & potassium from the presynaptic neuron to the postsynaptic neuron.impulses traveling as electrical currents across the gap.impulses causing the release of a neurotransmitter signal and its diffusion across the gap.impulses ricocheting back and forth across the gap.
- 13. Multiple ChoiceWhat is a characteristic of axons?When there is resting potential, the outside of the axon is negative relative to the inside.During an action potential, sodium ions diffuse into the axon.The axon is depolarized when potassium ions diffuses out of it.Depolarization occurs when potassium ions diffuses into the axon.
- 14. Multiple ChoiceDepolarization occurs becausemore potassium ions diffuse into the cell than sodium ions diffuse out ofmore potassium ions diffuse out of the cell than sodium ions diffuse into itmore sodium ions diffuse into the cell than potassium ions diffuse out of itmore sodium ions diffuse out of the cell than potassium ions diffuse into it
- 15. Multiple ChoiceThe sodium-potassium pump is involved in establishing the resting membrane potential.TrueFalse
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