Final answer:
The Sympathetic nervous system is responsible for the physiological response that prepares the body for 'fight-or-flight', characterized by various signs such as sleeplessness, rapid heart rate, and expanded bronchial passageways. The correct option is B.
Step-by-step explanation:
The physiological response characterized by sleeplessness, constricting blood vessels, expanding bronchial passageways, increasing the chances of seizures, and raising heart rate, blood pressure, and temperature is a result of the activation of the Sympathetic nervous system.
This response, often referred to as the fight-or-flight reaction, is an essential part of our body's acute stress response. It is designed to prepare the body to face a threat by enhancing alertness, oxygen intake, and energy mobilization while suppressing non-essential functions like digestion.