A Relative Date Is

question 11

Multiple Choice

A relative date is:

• A) a date expressed as a specific unit of scientific measurement, such as days, years, centuries, or millennia.
• B) a date expressed relative to another (e.g., earlier, later, more recent, etc.) rather than in absolute terms.
• C) a date based on the occurrence of distinctive fossil assemblages in distinct strata.
• D) no longer useful for archaeology; absolute dates are necessary in order to provide a meaningful interpretation of an assemblage.

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Definitions:

Myelin

An insulating layer, or sheath, made of protein and fatty substances, that surrounds the axons of some neurons, enabling fast and efficient transmission of electrical impulses.

Synaptic Cleft

The small gap at a synapse between neurons, across which neurotransmitters move from one neuron to another.

Terminal Buttons

The small knobs at the end of an axon that release chemicals called neurotransmitters into the synapse, thereby transmitting nerve impulses to another nerve cell.

Cell Membrane

The thin, flexible barrier that surrounds cells, controlling the movement of substances in and out of the cell.