Which of the following indicates vasoconstriction during hemorrhagic shock?

In the context of hemorrhagic shock, vasoconstriction is a physiological response that occurs as the body attempts to maintain blood pressure and perfusion to vital organs despite significant blood loss. A falling height of the capnography waveform indicates a decrease in carbon dioxide levels in the exhaled air, often associated with reduced blood flow and perfusion, including potential vasoconstriction.

During shock, especially due to hemorrhage, the body activates compensatory mechanisms to preserve blood flow. Vasoconstriction reduces the diameter of blood vessels, leading to increased systemic vascular resistance and potential changes in the capnography readings. When blood flow decreases, less carbon dioxide is transported from the tissues to the lungs, resulting in a falling capnography waveform.

The other options do not reflect vasoconstriction accurately. Rising body temperature is usually not a sign associated with hemorrhagic shock and can be more indicative of infection or hypermetabolism. Widening pulse pressures generally do not occur in hemorrhagic shock; instead, they may reflect other conditions like aortic regurgitation. An increased respiratory rate could occur in response to shock due to metabolic acidosis or hypoxia but does not directly indicate vasoconstriction. Therefore, the choice