These Statements Ask About Elements and Isotopes That Have Been

question 59

Short Answer

These statements ask about elements and isotopes that have been important in learning about Earth's history and the age of organisms. For each one, select the best choice from the five isotopes or elements below.
-portions of Earth's outermost layer of rock, which move continents to new locations over geologic time
A)magma
B)faults
C)tectonic plate
D)volcanic island chains (archipelagos)
E)trench

• A)magma
• B)faults
• C)tectonic plate
• D)volcanic island chains (archipelagos)
• E)trench

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Definitions:

Myelin

A fatty substance that forms a protective coating around nerve fibers in the brain and spinal cord, improving the speed and transmission of electrical signals.

Axon

a long, slender projection of a nerve cell that typically conducts electrical impulses away from the neuron's cell body.

Transmission

Transmission, in the context of diseases, refers to the mechanisms through which an infectious agent is spread from one host to another.

Neurons

Specialized cells transmitting nerve impulses; the basic building blocks of the nervous system.