The influx of calcium ions into the axon terminal triggers exocytosis.
I found out what causes muscle soreness after workouts. Since the early 20th century, this specific type of muscle soreness, called “delayed onset muscle soreness” (DOMS), was thought to be cause by lactic acid buildup in the muscles during strenuous workouts where your body's oxygen supply is depleted.
One way of learning about the earth's past is by studying fossils. When we find the fossil of a tropical fish, it means that at one time, there existed a warm ocean in the area. Palm trees thrived on a warm climate so we can also deduce that the environment at the time was also warm.
Nearly all the mitochondria in your cells were inherited from your mother.