The Area of a Neuron Where Most Neural Impulses Begin

question 42

Multiple Choice

The area of a neuron where most neural impulses begin that has a higher concentration of sodium channels than the cell body or dendrite is a:

• A)Trigger zone
• B)Axon
• C)Synapse
• D)Schwann cell
• E)Node of Ranvier

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Definitions:

Sexual Dimorphism

The condition where two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs.

Sahelanthropus

An extinct genus of hominids believed to be one of the earliest members of the human lineage, dating back to approximately 7 million years ago.

Hominin Discovered

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Human species living in Europe and western Asia from about 250,000 to 28,000 years ago; may have interbred with modern humans (Homo sapiens).