Final answer:
Blood vessels constricting, sweat glands not secreting fluid, and shivering (involuntary contraction of muscles) to generate heat are not symptoms of heat stroke.
Step-by-step explanation:
The physical condition that is not a symptom of heat stroke is blood vessels constricting to conserve heat, sweat glands not secreting fluid, shivering (involuntary contraction of muscles) to generate heat, which warms the body.