**Core Concept**
The lungs have a neuroendocrine function through the presence of neuroendocrine cells, also known as neuroendocrine bodies or Kulchitsky cells, which are scattered throughout the bronchial epithelium. These cells produce and secrete various peptides and amines, including calcitonin gene-related peptide (CGRP), substance P, and vasoactive intestinal peptide (VIP), which play a role in regulating various physiological processes.

**Why the Correct Answer is Right**
The correct answer is linked to the production and release of CGRP by the neuroendocrine cells in the lungs. CGRP is a potent vasodilator that is involved in the regulation of vascular tone and blood pressure. The release of CGRP from the lungs is triggered by the stimulation of the parasympathetic nervous system, particularly the vagus nerve. The increase in CGRP levels in the bloodstream can lead to vasodilation and a subsequent decrease in blood pressure.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe a neuroendocrine function of the lungs. While the lungs do play a role in the regulation of pH through the buffering of carbon dioxide, this is not a neuroendocrine function.

**Option B:** This option is incorrect because it is not a specific example of a neuroendocrine function of the lungs. The lungs do contain various types of cells that can produce and secrete peptides and amines, but this option is too vague to be correct.

**Option D:** This option is incorrect because it does not accurately describe a neuroendocrine function of the lungs. While the lungs do play a role in the regulation of blood pressure through the release of various peptides and amines, this is not a specific example of a neuroendocrine function.

**Clinical Pearl / High-Yield Fact**
The neuroendocrine cells in the lungs are often referred to as the "lung-kidney axis" because of their role in regulating blood pressure and fluid balance.

**Correct Answer:** C.