An Excitatory Neurotransmitter That Is Found Throughout the Brain and Is

question 219

Multiple Choice

An excitatory neurotransmitter that is found throughout the brain and is especially important in learning and memory is:

• A) serotonin.
• B) acetylcholine.
• C) GABA.
• D) glutamate.

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Definitions:

Active Transport

The movement of molecules across a cell membrane requiring energy input, typically against their concentration gradient.

Bicarbonate Ions

Chemical ions (HCO3-) that act as a buffer in blood and help maintain the body's pH balance.

Pepsinogen

Proenzyme formed and secreted by the chief cells of the gastric mucosa; the acidity of the gastric juice and pepsin itself converts pepsinogen into pepsin.

Zymogen Granules

Intracellular storage granules found in the pancreas and other glands, containing inactive enzyme precursors that can be activated when needed.