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Tracie Is Gathering Sources of Support for Her Persuasive Speech

question 36

Multiple Choice

Tracie is gathering sources of support for her persuasive speech on animal testing for medical purposes.She makes use of Web sources and has a great deal of relevant material.However,when outlining the speech,she can't find the source of many of the facts and statistics she plans to use.What is Tracie's problem?


Definitions:

Synaptic Cleft

The small gap between neurons across which neurotransmitters are released to transmit signals from one neuron to another.

Axon Terminal

The endpoint of an axon where neurotransmitters are released to send signals to other neurons or muscle cells.

Dendrite

A branched extension of a neuron that receives signals from other neurons or sensory receptors and conducts them toward the cell body.

Myelin Sheath

A fatty layer that surrounds nerve fibers, enhancing the speed and efficiency of electrical signal transmission in the nervous system.

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