Question

endorphins can reduce the perception of sensations initiated by nociceptors. chemoreceptors. mechanoreceptors. proprioceptors. thermoreceptors.

Explanation:

Endorphins are natural pain - relievers. Nociceptors are sensory receptors that detect painful stimuli. Endorphins act on the nervous system to reduce the perception of pain signals sent by nociceptors. Chemoreceptors detect chemical changes (e.g., in taste, smell), mechanoreceptors detect mechanical forces (e.g., touch, pressure), proprioceptors detect body position and movement, and thermoreceptors detect temperature changes. None of these other receptors' sensations are primarily targeted by endorphins for reduction in the way pain (from nociceptors) is.

Answer:

nociceptors.