Which of the following is a common symptom of hypocapnia?

Hypocapnia, which is a state of reduced carbon dioxide (CO2) levels in the blood, is typically associated with hyperventilation. One of the common physiological responses to hypocapnia includes vasoconstriction, which can lead to cold and clammy skin. This occurs because the body prioritizes blood flow to vital organs, causing peripheral circulation to decrease.

In this context, cold, clammy skin is a physical manifestation of the body responding to the effects of low CO2, as the skin can feel cold due to reduced blood flow and higher peripheral resistance. Other symptoms related to hyperventilation or hypocapnia may include dizziness, confusion, tingling sensations, and visual disturbances, but these are not necessarily represented in the options provided.

The other symptoms listed, such as excessive sweating, sharp chest pain, and visual distortion, may relate to various conditions, but they are not specifically characteristic of hypocapnia itself. Excessive sweating typically relates to stress or heat; sharp chest pain may be tied to cardiac issues or other complications rather than directly to hypocapnia; and visual distortion can occur from a range of other issues, though it is not a primary symptom of low CO2 levels. Thus, cold, clammy skin