Do you prefer full moons, new moons, or crescents? Whatever your birth moon, with Moonglow jewelry you can wear your favorite moon! Our moon phase necklaces make great gifts for any occasion, especially birthdays and anniversaries!
In the brain, dopamine functions as a neurotransmitter âa chemical released by nerve cells to send signals to other nerve cells. The brain includes several distinct dopamine systems, one of which plays a major role in reward-motivated behavior.
The distinctive characteristics of neurotransmitters, compared to other signaling molecules, are made clearer by comparison with the actions of the hormones secreted by the endocrine system. Hormones typically influence target cells far removed from the hormone-secreting cell (see Chapter 8).he subsequent binding of neurotransmitters to specific receptors on postsynaptic neurons (or other classes of target cells) transiently changes the electrical properties of the target cells, leading to an enormous variety of postsynaptic effects (see Chapters 7 and 8).