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.
Bark of the northern white cedar. A variety of both evergreen and deciduous trees may be present in the rich conifer swamp in addition to the dominant species. 1  Thuja occidentalis: Northern white cedar, the dominant conifer, also known as arborvitae, a common landscape specimen in northern U.S. states and Canada.2  Abies balsamea: Balsam fir. variety of both evergreen and deciduous trees may be present in the rich conifer swamp in addition to the dominant species. 1  Thuja occidentalis: Northern white cedar, the dominant conifer, also known as arborvitae, a common landscape specimen in northern U.S. states and Canada. 2  Abies balsamea: Balsam fir.