By Dr Ananya Mandal, MD. Dopamine is a neurotransmitter released by the brain that plays a number of roles in humans and other animals. Some of its notable functions are in: 1  movement. 2  memory. 3  pleasurable reward.
Sycamores (Platanus spp.) are tall, spreading shade trees. These North American natives have few problems or pests, but their older bark flakes off in patches. If your sycamore is shedding bark, it may be a healthy, maturing tree.
It is a fast-growing tree that grows 100 feet tall, and 90 feet wide. The attractive grayish-green bark peels off to reveal patches of white wood underneath. Spiky ball-shaped fruits contain thousands of tiny winged seeds that are released in the fall. American Sycamores grow best in full sun in rich, moist soil.