Beta endorphins have which effects?

• A. Analgesic and stress reduction
• B. Increased agitation
• C. Increased pain sensitivity
• D. Sedation

Answer: (A)

The main concept here is that beta-endorphins are part of the body's natural opioid system that modulates pain and stress. They act as analgesics by binding to mu-opioid receptors in the brain and spinal cord, which dampens the transmission of pain signals and can produce a sense of well-being that helps reduce stress. This combination—pain relief with a calming or mood-boosting effect—explains why analgesia and stress reduction are the correct effects.

The other options don’t fit this primary action: beta-endorphins don’t typically increase agitation or increase pain sensitivity, and while opioids can cause sedation in some contexts, the characteristic and most direct role of endogenous beta-endorphins is analgesia and stress modulation, not sedation.