Final answer:
Nociceptors are indeed sensitive to mechanical, thermal, electrical stimuli, and toxic substances, making the statement true. They play a key role in the sensation of pain, responding to a variety of potentially damaging stimuli.
Step-by-step explanation:
It is true that nociceptors are sensitive to a variety of stimuli, including mechanical, thermal, and electrical stimuli, as well as toxic substances. Nociceptors are specialized nerve endings responsible for the sensation of pain, a process known as nociception. These receptors are activated by potentially damaging stimuli which can elicit painful sensations. For instance, the capsaicin in hot peppers activates nociceptors sensitive to temperatures above body temperature, and is utilized in products such as Icy Hot™ for its analgesic properties.