Section Test:Nerve Cells

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Topics Covered

This Section Test covers the structure of individual neurons, basic neural organizations (reflexes), and how neurons propagate signals. It does not cover the advanced structures of the nervous system such as the brain, spinal cord, and adapted sensory organs.


Section Test

1. Which of the following is true in regards to neurons?

Dendrites carry information toward the cell body.
Axons carry information toward the cell body.
Dendrites carry information away from the cell body
None of the above

2. Which neurons conduct information toward the central nervous system?

sensory neurons
motor neurons
interneurons
none of the above

3. In neurons with myelin sheaths, nerve impulses

conduct faster than neurons without myelin sheaths
conduct slower than neurons without myelin sheaths.
conduct at the same speed as neurons without myelin sheaths.
occur in greater numbers than neurons without myelin sheaths.

4. The depolarization and repolarization of a neuron membrane is called

action potential
resting potential
excitability
propagation

5. What are the spaces between adjacent neurons called?

gap junctions
effectors
synaptic clefts
tight junctions

6. What is the function of neurotransmitters?

to speed up nerve impulses
chemically link neurons across the synapse to other neurons
receive and transmit signals between dentritic ends of neurons
to stimulate effector neurons
→ Not all neurotransmitters stimulate their downstream target to fire, some do the opposite and make it harder for them to signal when they do receive a stimulatory signal.

7. For a neuron to return to its resting potential, it must

lose negative charge
lose positive charge
gain negative charge
gain more sodium ions

8. When a neuron is depolarized, the inside of the membrane temporarily becomes

more negative than the outside
more positive than the outside
neutral compared to the outside.
None of the above

9. If you accidentally touch a hot stove, you pull your finger away before the impulse is relayed to the

spinal cord
effector
brain
receptor

10. K+ moves out of the axon during the

depolarization period
refactory period
resting period
repolarization period

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