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.
Inhibition of Acetylcholinesterase at the Neuromuscular Junction I. Background Acetylcholine is the neurotransmitter used at the neuromuscular junction to generate muscle contractions. Acetylcholine (ACh) is released when an action potential reaches the axon terminus of a motor neuron.his Ca 2+ triggers the movement of ACh filled vesicles to the pre-synaptic nerve cell membrane and the exocytotic release of ACh. ACh then diffuses across the neuromuscular junction and binds to its receptor on the post-synaptic cell membrane (in this case, the plasma membrane of the muscle cell).