Enkephalins produce presynaptic inhibition in neurons transmitting pain signals. Increased levels of enkephalins will
A) increase awareness of pain.
B) decrease awareness of pain.
C) increase amount of pain.
D) decrease amount of pain.
E) have no effect on awareness or amount of pain.

Question

Quizplus · Accepted Answer

Enkephalins are endogenous opioids that inhibit pain transmission by reducing the release of substance P, a neurotransmitter involved in the transmission of pain signals, thereby decreasing the awareness of pain.

Enkephalins Produce Presynaptic Inhibition in Neurons Transmitting Pain Signals