When neurotransmitter is released and is detected by the autoreceptor, the autoreceptor triggers the cessation of neurotransmitter release. In terms of the regulatory system, this process is
A) positive feedback.
B) negative feedback.
C) the correctional mechanism.
D) the system variable.
E) the set point.

Question

Quizplus · Accepted Answer

The process described is an example of negative feedback, where the output of a system (neurotransmitter release) is regulated by a process that reduces that output (the autoreceptor triggering cessation of neurotransmitter release) in order to maintain homeostasis. Positive feedback would involve the output increasing in response to a signal, rather than decreasing. The terms "correctional mechanism," "system variable," and "set point" are not applicable to this specific process.

When Neurotransmitter Is Released and Is Detected by the Autoreceptor