Which pleura is less sensitive to stimuli like pain and temperature?

Which pleura is less sensitive to stimuli like pain and temperature?

• A. Parietal pleura
• B. Visceral pleura
• C. Both pleura equally
• D. Neither pleura

Answer: (B)

The visceral pleura is less sensitive to stimuli such as pain and temperature because it is innervated primarily by autonomic nerves, which are not associated with the sensation of pain in the same way that somatic nerves are. The visceral pleura covers the lungs and is in direct contact with the lung tissue, receiving its sensory input from the vagus nerve and sympathetic fibers. This autonomic innervation does not transmit pain and temperature sensations effectively. In contrast, the parietal pleura, which lines the thoracic cavity, is highly sensitive to these stimuli because it is innervated by somatic nerves. This includes sensory fibers from the intercostal nerves and the phrenic nerve, which can detect pain, touch, pressure, and temperature. This difference in nerve supply explains why the visceral pleura does not respond to pain or temperature in the same manner as the parietal pleura, making it the correct choice in this context.

The visceral pleura is less sensitive to stimuli such as pain and temperature because it is innervated primarily by autonomic nerves, which are not associated with the sensation of pain in the same way that somatic nerves are. The visceral pleura covers the lungs and is in direct contact with the lung tissue, receiving its sensory input from the vagus nerve and sympathetic fibers. This autonomic innervation does not transmit pain and temperature sensations effectively.

In contrast, the parietal pleura, which lines the thoracic cavity, is highly sensitive to these stimuli because it is innervated by somatic nerves. This includes sensory fibers from the intercostal nerves and the phrenic nerve, which can detect pain, touch, pressure, and temperature.

This difference in nerve supply explains why the visceral pleura does not respond to pain or temperature in the same manner as the parietal pleura, making it the correct choice in this context.