A Myelin Sheath Is a

question 61

Multiple Choice

A myelin sheath is a

• A) nerve network within the brainstem that controls physical arousal.
• B) large band of neural fibers connecting the two hemispheres of the brain.
• C) fatty tissue layer encasing the axon of a nerve cell.
• D) bushy extension of a neuron that conducts impulses toward the cell body.

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Definitions:

Groundwater Contaminates

Substances that pollute or degrade the quality of groundwater, including chemicals, waste products, or pathogens.

Landfills

Designated areas where waste is disposed of by burial, often compacted and covered with soil to prevent contamination of the environment.

Service Stations

Facilities where motorists can refill their vehicle's fuel tank, and often also contains a convenience store or mechanic shop for minor repairs.

Water Contamination

The presence of harmful chemicals, pollutants, or pathogens in water, making it unsafe for consumption or use.