Which of the following is a major function of adrenaline?

The major function of adrenaline, also known as epinephrine, is to boost energy for the fight-or-flight response. When faced with a stressful situation, the body releases adrenaline, which prepares it to respond to perceived danger. This hormone triggers several physiological changes, such as increasing heart rate, enhancing blood flow to muscles, and releasing energy stores, all of which enable a quick and effective reaction to threats.

The fight-or-flight response is essential for survival, as it equips individuals to either confront the danger or escape from it. Adrenaline mobilizes the body’s energy resources, ensuring that one has the necessary strength and speed during emergencies. Hence, C accurately reflects this critical role of adrenaline in human physiology.

The other options do not align with the primary functions of adrenaline. Enhancing sleep quality is not associated with adrenaline; in fact, adrenaline produces alertness. Lowering blood pressure contradicts the role of adrenaline, which typically increases blood pressure as part of its stress response. Similarly, while regulating body temperature is important for overall homeostasis, it is not a direct function of adrenaline.