Which vital signs indicate shock?

The correct choice highlights key indicators of shock, which is a critical condition that arises when there is not enough blood flow to the organs, leading to inadequate oxygen delivery. Tachycardia, or an elevated heart rate, often occurs in response to the body's attempt to compensate for decreased blood volume or low blood pressure. Hypotension, or low blood pressure, signifies that the body is not able to maintain sufficient pressure to circulate blood effectively, which is a hallmark of shock. Altered mental status reflects the brain's response to decreased perfusion; confusion or reduced responsiveness can indicate that the brain is not receiving adequate oxygen.

The other options do not adequately reflect the physiological changes associated with shock. Elevated temperature and bradycardia, along with normal blood pressure, do not suggest shock; instead, they could be indicative of different medical conditions. Increased respiratory rate, headache, and diaphoresis (excessive sweating) might occur in various situations but do not specifically indicate shock. Low blood sugar, rapid pulse, and high temperature may suggest other issues, like an infection or metabolic imbalance, but again do not align with the classic vital sign indicators of shock.