Question

question 4
sensory receptors for all of the following adapt quickly to repeated stimulation by sending fewer and fewer impulses except
__________.
a pain receptors
b thermoreceptors
c chemoreceptors
d mechanoreceptors
question 5
which type of pain fibers are unmyelinated and therefore conduct impulses more slowly than the myelinated pain fibers?

Explanation:

• Pain receptors (A): Pain receptors, or nociceptors, are generally slow - adapting. Their main function is to alert the body to potential or actual tissue damage. If they were to adapt quickly, the body might not be adequately protected from ongoing harmful stimuli. For example, if a person has a persistent injury (like a burn that is still damaging tissue), the continuous pain signal from the nociceptors prompts the body to take action (such as removing the source of the burn or seeking medical help).
• Thermoreceptors (B): Thermoreceptors adapt relatively quickly. When the body is exposed to a constant temperature (e.g., getting into a warm bath and then staying in it), the initial strong signal of “warm” or “cold” fades as the thermoreceptors adapt.
• Chemoreceptors (C): Chemoreceptors (e.g., those in the nose for smell or on the tongue for taste) can adapt. For instance, when entering a room with a strong odor, the perception of that odor lessens over time as the chemoreceptors in the nose adapt to the constant chemical stimulus.
• Mechanoreceptors (D): Many mechanoreceptors (e.g., those for touch in the skin) can adapt. When wearing a watch, the initial sensation of the watch on the wrist fades as the mechanoreceptors adapt to the constant mechanical pressure.

Answer:

A. Pain receptors