Receptors - these are structures on the surface of the receiving cell which have a space designed just for the transmitter (if the transmitter is a key, receptors are the lock into which they fit) Enzymes - these surround the synapse and break down any spare transmitter that might leak out...
(in the extracellular fluid) relative to inside the cell (in the cytoplasm). The negative charge within the cell is created by the cell membrane being more permeable to potassium ion movement than sodium ion movement. In neurons, potassium ions are maintained at high concentrations within the ce...
b. PNS. c. Is the "white matter". d. Travels hundreds of times faster than unmyelinated. e. All of the above How does acetylcholine enter the synaptic cleft? a. active transport b. simple diffusion c. facilitate diffusion d. exocytosis e. endocytosis Myelinated n...
Neurotransmitters do a wide range of things, and an excess or deficiency of them plays a role in many different diseases. Acetylcholine (ACh) is a major transmitter for basic body functions, including contraction and control of muscles and involuntary actions. Low ACh levels are associated with A...
enter a nerve synapse (communication passage between nerve cells), attach to an axon and lastly permanently block the release of the neurotransmitter Acetylcholine, (ACH). This terminates all messages moving along that nerve pathway, producing paralysis in the muscles served by that motor neuron [6...
Since the description of the first case of AD by Alois Alzheimer more than a century ago [9], the pathogenesis of the disease has still not been clearly understood. In the mid-1970s, the cholinergic hypothesis was proposed on the basis that patients exhibited low levels of acetylcholine. Th...