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.

Enkephalins

Peptides in the brain that bind to opiate receptors, acting as natural painkillers and also involved in various bodily functions.

Presynaptic Inhibition

Presynaptic Inhibition is a mechanism where the release of neurotransmitters from a neuron is decreased, modulating neural activity and preventing overstimulation.

Pain Signals

Neural transmissions that convey the sensation of pain from the peripheral nervous system to the central nervous system.