What physiological response involves blood flowing into larger muscle groups to provide oxygen during stress?

The correct choice is vasodilation, a physiological response that occurs during stress or a "fight or flight" situation. When faced with a stressful event, the body prepares to respond by increasing blood flow to larger muscle groups. This process is essential because it ensures that these muscles receive more oxygen and nutrients, enhancing physical performance and readiness for action.

Vasodilation is characterized by the widening of blood vessels, allowing for increased blood flow. This mechanism helps support rapid movement and physical exertion, which are critical when the body perceives a threat. Consequently, the larger muscle groups, such as those in the legs and arms, are prioritized to prepare for potential physical activity.

In contrast, vasoconstriction, the narrowing of blood vessels, would restrict blood flow and generally direct resources away from the larger muscle groups, which is not conducive to a fight-or-flight response. Auditory distortion and eye gaze do not directly relate to the physiological redirecting of blood flow during stress. These responses may occur under stress but are not mechanisms primarily related to the distribution of blood flow in the context of physical preparedness.