Glutamate can be toxic to neurons because
a. NMDA receptors allow calcium into a cell, and excess calcium can stimulate harmful levels of enzyme activity.
b. NMDA receptors block the movement of calcium into a cell, preventing the release of other neurotransmitters.
c. it blocks receptors for other types of neurotransmitters, preventing effective communication between cells.
d. its breakdown in the synaptic gap produces harmful free radicals.
a
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When people hear a sound, their ears turn the vibrations in the air into neural messages from the auditory nerve, which makes it possible for the brain to interpret the sound. This process is called _____________
a) encoding. b) storage. c) retrieval. d) evaluation.
Binet defined intelligence as
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