When Two Action Potentials Arrive Simultaneously at Two Different Presynaptic

question 54

Multiple Choice

When two action potentials arrive simultaneously at two different presynaptic terminals that synapse with the same postsynaptic neuron,

• A) the direction of the action potential is reversed.
• B) temporal summation occurs.
• C) spatial summation occurs.
• D) hyperpolarization occurs.
• E) threshold is never reached.

Understand the importance of properly commenced graph axes for clarity in visualization.

Identify the significance of graphics in enhancing the comprehensibility and appeal of technical communication.

Recognize the potential drawbacks and benefits of using photographs in documentation.

Evaluate the impact of graphics on the cost and effectiveness of translating documents for international audiences.

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Definitions:

Unconditioned Response

In classical conditioning, the automatic and natural reaction elicited by the unconditioned stimulus.

Neutral Stimulus

A neutral stimulus is a stimulus that initially produces no specific response other than focusing attention, until it is paired with an unconditioned stimulus.

Unconditioned Stimulus

In classical conditioning, an unconditioned stimulus is anything that naturally and automatically triggers a response without any learning needed.

Stimulus Discrimination

The tendency to respond differently to two or more similar stimuli; in classical conditioning, it occurs when a stimulus similar to the CS fails to evoke the CR.