Ever wonder why studying hard or taking multiple AP tests in a row makes you exhausted, or even hungry? This is because when you think, your brain has to work hard to send "messages" through the neurons to different parts of the brain and body. Cellular respiration turns your food (glucose) into adenoside triphosphate, or ATP. This is the molecule that many body functions require to do work, such as facilitated diffusion, muscle movement, and yep, you guessed it-- thinking. The sodium ion pump that creates a gradient in the nerve cell interior allows for the inside of the cell to become positive. The combination of the ATP- using sodium ion gradient and the two diffusion- using potassion and sodium channels allows for the neuron to send an electric pulse down the axon. At the end of the cell, called the transmitter, the pulse allows ligands (or signal molecules) to continue the message to the next brain cell, which will send another signal until the message reaches its intended destination.
...Scientific evidence as to why proctors should let us return to our bags for food. Physics says we need it to think! Post below with your favorite brain food! Mine is a chocolate chip cliff bar, and I know a certain math geek's is a buffalo chicken wrap
Happy post-APs, everyone!