I have also been a potential victim of these dangers, whether it is staying up late to catch up on studying or watching too many TV programs, I too have put myself in danger for the day to come from my lack of rest. A biological clock, also known as a biological clock, is an internal mechanism that controls various functions and activities of the body such as: metabolic changes, hormone secretion, fluctuations in body temperature, and other bodily activities. It regulates the daily cycle of sleep and wakefulness and provides a wake-up signal to the rest of the brain. Due to my large sleep debt, and sometimes jet lag or late night classes, I tend to be more of a night person than a day person. Drowsiness can affect your learning abilities as it can make you fall asleep in class, thus making learning impossible, and it can cause you to lose focus on what is being taught. Your ability to problem solve, listen, learn, and concentrate is limited. Constantly sleepy during classes when I was in high school, I forgot important dates, names and places of important people or events, thus making tests more tiring due to the lack of information I had failed to gather. Being tired to the point of exhaustion means you are less likely to perform at your best