For example, dopamine plays a big role in starting movement, and the destruction of dopamine neurons in an area of the brain called the substantia nigra is what produces the symptoms of Parkinsonâs disease. Dopamine also plays an important role as a hormone, inhibiting prolactin to stop the release of breast milk.
Why are sunspots darker than the rest of the Sun? Sunspots appear dark (in visible light) because they are much cooler than the rest of the surface of the Sun. However, even though they appear dark, they are still very hot. Sunspots have temperatures around 6,300 Fahrenheit (~3,500 Celsius) while the surrounding surface of the sun has a temperature of about 10,000 Fahrenheit (5,500 Celsius). If a sunspot was alone in space, it would glow brightly.
Share to: A sunspot is an area on the Sun's surface (the photosphere) that is affected by intense magnetic activity, which inhibits convection, thus reducing the surface temperature i â¦ n that region.Even though sunspots are still very bright and hot they appear darker because they are cooler than the surrounding area.he photosphere is the visible layer of the sun (or any other star). Light energy and photons and other solar radiation are given off and escape the sun from the photosphere.