Biology Chemical Coordination PMC 2020
PMDC Verified Question 39 of 50
Which of the following neurotransmitters function, both as neurotransmitter and hormones, decreasing our perception of pain?
A
Epinephrine
B
Dopamine
C
Serotonin
D
Endorphins
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Endorphins
Concept:

Certain molecules in the body serve dual roles, acting locally across synapses as neurotransmitters and systemically via blood as hormones.

Solution:

  • Endorphins are endogenous opioid peptides produced mainly in the central nervous system and the pituitary gland.


  • They bind to opiate receptors to naturally inhibit the transmission of pain signals and induce feelings of euphoria.


Why other options are incorrect:

Epinephrine is a stress hormone, dopamine is involved in reward pathways, and serotonin regulates mood. While they act as dual messengers, they are not primarily responsible for systemic pain reduction like endorphins.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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