Final answer:
Beta-endorphin is a neurotransmitter associated with the modulation of pleasure and pain.
So the correct answer is B
Step-by-step explanation:
Beta-endorphin is an endogenous opioid neuropeptide that acts as a neurotransmitter in the central nervous system. It plays a crucial role in the modulation of both pleasure and pain.
Beta-endorphin is known for its analgesic (pain-relieving) properties and is often referred to as the body's natural painkiller. Additionally, it is involved in the regulation of mood and is associated with the experience of pleasure and reward. This neurotransmitter is released in response to various stimuli, including stress and physical exercise, contributing to the overall well-being and the body's ability to cope with pain.
The correct answer is Option B