A Theory

question 13

Multiple Choice

A theory

• A) is an agreed-upon statement.
• B) summarizes and explains facts.
• C) cannot be tested.
• D) is less than fact.

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Definitions:

Threshold

The minimum level of stimulus intensity required to produce a response or result.

Excitatory Signals

Nerve impulses that increase the likelihood of a neuron firing, promoting the transmission of signals through the nervous system.

Refractory Period

In physiological context, a period immediately following stimulation during which a nerve or muscle is unresponsive to further stimulation.

Neuron

A cell of the nervous system that is specialized to transmit information throughout the body.