A cataract is a clouding of the lens in the eye that affects vision. Most cataracts are related to aging. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.
Acetylcholine. Acetylcholine (ACh) is the transmitter released by the preganglionic nerve terminals of both the sympathetic and the parasympathetic divisions (Fig 6.2). The synapse at those sites utilizes a nicotinic receptor similar in structure to the receptor at the neuromuscular junction.
Sorry, something has gone wrong. Trending Now. Answers. Best Answer: Neurotransmitter is a chemical that is released from a nerve cell which transmits an impulse from a nerve cell to another nerve, muscle, organ, or other tissue.it is a messenger of neurologic information from one cell to another.