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- 1. Multiple Choice
What is voltage in the context of neuron physiology?
A measure of potential energy generated by kinetic movement
A measure of potential energy generated by separated charge
A measure of electrical resistance
A measure of current flow
- 2. Multiple Choice
What are the two main types of ion channels a neuron uses to get ions in and out?
Gated and open
Gated and leakage
Active and passive
Chemical and mechanical
- 3. Multiple Choice
Which of the following is NOT a type of gated channel mentioned in the text?
Chemical
Voltage
Mechanical
Thermal
- 4. Multiple Choice
Where is the concentration of Na+ ions higher?
ECF
ICF
In the neuron nucleus
In the synaptic cleft
- 5. Multiple Choice
Where is the concentration of K+ ions higher?
ECF
ICF
In the neuron nucleus
In the synaptic cleft
- 6. Multiple Choice
How does the sodium-potassium pump work?
2 Na+ out of the cell, and 3 K+ into the cell
3 Na+ into the cell, and 2 K+ out of the cell
3 Na+ out of the cell, and 2 K+ into the cell
2 Na+ into the cell, and 3 K+ out of the cell
- 7. Multiple Choice
What type of stimulus is described as short-lived and dissipates quickly?
Action potentials
Graded potentials
Continuous potentials
Threshold potentials
- 8. Multiple Choice
What type of stimulus is responsible for delivering long-distance messages from axons to dendrites?
Graded potentials
Action potentials
Continuous potentials
Threshold potentials
- 9. Multiple Choice
Which of the following is NOT one of the main steps to generate an action potential?
Resting - all gated channels are closed
Depolarization - an influx of Na+ ions into the cell
Hyperpolarization - an influx of K+ ions out of the cell
Repolarization - an influx of Cl- ions into the cell
- 10. Multiple Choice
What is the term used to describe the time during which a neuron cannot trigger another action potential?
Activation period
Refractory period
Response period
Recovery period
- 11. Multiple Choice
Which of the following best describes hyperpolarization?
Na+ gates are open and K+ channels are closed
Na+ gates are partially open and K+ channels are partially closed
Na+ gates are closed and K+ channels are open
Na+ gates are fully closed and K+ channels are beginning to close, but some are still open
- 12. Multiple Choice
All depolarization events cause an action potential.
True
False
- 13. Multiple Choice
What are the two types of refractory periods?
Absolute and Relative
Primary and Secondary
Initial and Terminal
Complete and Incomplete
- 14. Multiple Choice
Action potentials occur only in the axon.
True
False
- 15. Multiple Choice
Which type of conduction is associated with myelinated axons?
Continuous
Saltatory
Static
Progressive
- 16. Multiple Choice
Which type of conduction is slower and found in nonmyelinated axons?
Continuous
Saltatory
Static
Progressive
- 17. Multiple Choice
Which part of a neuron receives incoming signals from other neurons?
Axon
Dendrites
Cell body
Myelin sheath
- 18. Multiple Choice
What is the gap between two neurons called?
Axon hillock
Synaptic cleft
Dendritic spine
Neural pathway
- 19. Multiple Choice
What is the role of the myelin sheath?
To protect the neuron from physical damage
To increase the speed of electrical impulses along the axon
To produce neurotransmitters
To connect neurons together
- 20. Multiple Choice
Which of the following is NOT a function of the nervous system?
Sensory input
Muscle coordination
Hormone production
Integration of information
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