What is one key symptom of histotoxic hypoxia?

Histotoxic hypoxia occurs when the body's tissues are unable to utilize oxygen, even when sufficient oxygen is present. This condition is often caused by toxic substances like cyanide that inhibit the ability of cells to use oxygen effectively, despite normal or elevated levels of oxygen in the bloodstream.

The correct answer highlights that the primary symptom of histotoxic hypoxia is the impaired ability of hemoglobin and cells to utilize oxygen, which can lead to tissue and cellular dysfunction. This is pivotal for understanding how certain poisons and toxins affect oxygen delivery at the cellular level and the consequences that arise from this impairment. Recognizing this symptom is crucial for identifying and responding to potential environmental or chemical exposures that can lead to histotoxic hypoxia.