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Nervous System Cells - Statistics
General Stats
- This quiz has been taken 19 times
- The average score is 10 of 15
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| Nervous cells are also called | neurons | 93%
|
| Which of these are parts of a neuron? | dendrites, cell body, axon, myelin sheath, axon terminal | 86%
|
| What are ganglia? | oval-shaped clusters of nerve cells, usually found outside the Central Nervous system and functioning as relay stations | 86%
|
| What starts an action potential? | a stimulus from the internal or external environment, or a nearby cell's action potential | 79%
|
| What are the types of cells that form myelin sheaths? | Schwann cells and Oligodendrocytes | 79%
|
| What two factors cause an action potential to be faster? | thickness and myelination | 79%
|
| Schwann cells creating a myelin sheath along a neuron's axon have been compared to: | electric tape around a wire | 71%
|
| What are nodes of Ranvier? | gaps between sections of myelin | 71%
|
| The other cells of the nervous system are called | glial cells, or glia | 64%
|
| Which is true of Schwann cells and Oligodendrocytes? | Schwann cells are in the Peripheral Nervous System, oligodendrocytes in the Central Nervous System | 64%
|
| Why is gray matter darker than white matter? | gray matter contains the neurons' nuclei, which are darker | 57%
|
| Where does the action potential usually start? | the axon hillock, or "neck" of the neuron | 57%
|
| The "all-or-none law" refers to: | an action potential happens at a fixed speed or doesn't happen at all | 50%
|
| What is the myelin sheath made of? | lipids | 50%
|
| What is the name of the "jumpy" conduction of an action potential across the nodes of Ranvier? | saltatory conduction | 36%
|
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