By the Eleventh Century,roughly How Many Different Languages Were Spoken

question 74

Multiple Choice

By the eleventh century,roughly how many different languages were spoken in Africa?

• A) 50
• B) 75
• C) 125
• D) 190
• E) 800

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Definitions:

Absolutely Refractory Period

A phase immediately following the firing of a nerve in which the neuron is unable to fire again, ensuring the unidirectional flow of nerve impulses.

Resting Membrane Potential

The electrical potential difference across the membrane of a neuron at rest, typically around -70mV.

Refractory Periods

The period immediately following an action potential during which a neuron is incapable of firing another action potential, ensuring the unidirectional flow of nerve impulses.

Firing Rate

Firing rate refers to the frequency at which a neuron sends electrical impulses, an important factor in the neural encoding of information.