When Neurotransmitters Are Being Released by a Presynaptic Neuron into the Synapse,it

question 20

Multiple Choice

 When neurotransmitters are being released by a presynaptic neuron into the synapse,it is because ____. 

• A)the neuron is in a refractory period
• B)there is a large concentration of Na+ ions outside of the presynaptic axon
• C)action potentials have occurred in the postsynaptic neuron
• D)action potentials have occurred in the presynaptic neuron

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Definitions:

Conditioned Fear

A learned response to a previously neutral stimulus that has been repeatedly paired with an aversive stimulus.

Santa Claus

A mythical figure associated with the celebration of Christmas, known for delivering gifts to children around the world.

Classical Conditioning

The method by which repeated association of two stimuli results in a response that was initially elicited by the second stimulus being elicited by the first stimulus over time.

Neutral Stimulus

An initially neutral stimulus that doesn't trigger a specific reaction besides drawing attention, until it becomes linked with an unconditioned stimulus.