What is Acetylcholine? and it's functions?
352987
Also known as ACh, it functions to activate an action potential, and since you are referring to psyh., ACh would help the brain interpret b/w the 2 hemispheres(right/left), which as you know, depending on which side the brain is activated, will determine your analytical, thinking and emotional repsonses.
910390
Parasympathetic part of your autonomic nervous system for GI stimulation.  Also the EN as the person below me just mentioned can cause it to contract.  In general it mainly is the EN.  Parasympathetic regulation by the brain is really just an extra component of contraction.  If you weren't taught EN go with parasympathetic it really just depends how basic your course is and if they are just teaching you functions of the somatic and autonomic (parasympathetic/sympathetic) pathways or if your actually going into GI physiology.
629249
blockinng the movement of sodium and calcium ions across the cell membrane of the neuron. This inhibits saltatory transmission of neurotransmitters.
193366
A nerve impulse is the electro-chemical signal that is initiated between nerve synapses(the gaps between nerve endings). The primary agent for this is ace·tyl·cho·line ,a neurotransmitter C7H17NO3 released at autonomic synapses and neuromuscular junctions and formed enzymatically in the tissues from choline.
979404
Actually I think he meant, "What would reduced extracellular Ca++ concentration (hypocalcemia) do to the synaptic transmission at the NMJ?"\n\nIf this is what you mean, then here's my answer:\n\nCalcium is required for the release of acetylcholine at the NMJ.  If there is a large reduction of calcium in the body, eventual results include flaccid paralysis, poor pupillary response to light, and coma.  This occurs after a temporary bout of hyperexcitability and tetany.
208670
im taking psych 1010 right now, and what we learned is that if you can figure out how the mind and nervous system work we can help figure out why we as people do the things we do. like sudying the nervous system helps explain our reactions, emotions, and studying the parts of the brain helps us to know how we control our speech, motor skills, and many other things. it is kind of a building block for everything else. i hope this helps
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THE AUTONOMIC NERVOUS SYSTEM \n\n1. THE AUTONOMIC NERVOUS SYSTEM REGULATES ACTIVITIES THAT ARE AUTOMATIC, OR INVOLUNTARY. \n\n2. The Nerves of the Autonomic Nervous System CONTROL Functions of the body that are NOT UNDER CONSCIOUS CONTROL. \n\n3. The Autonomic Nervous system seems to be concerned with striking a balance or MAINTAINING HOMEOSTASIS IN THE FUNCTIONING OF MANY ORGANS OF THE BODY. \n\n    EXAMPLES:  CONTRACTION IN THE HEART, DIGESTION, HEART RATE, BREATHING, SALIVATION, AND BLADDER. \n\n4. THE AUTONOMIC NERVOUS SYSTEM IS FURTHER SUBDIVIDED INTO TWO PARTS: \n\n    A. THE SYMPATHETIC DIVISION \n\n    B. THE PARASYMPATHETIC DIVISION \n\n5. The TWO parts have OPPOSITE EFFECTS on the ORGANS they control. (See Table 49-1) \n\n6. Most organs controlled by the Autonomic Division are under control of both Sympathetic and Parasympathetic Neurons. \n\nEXAMPLE:   Heart Rate is SPEEDED UP by the Sympathetic Nervous System, and it is \n                       SLOWED DOWN by the Parasympathetic Nervous System. \n\n7. The Sympathetic Division generally ACTIVATES ORGANS or SPEEDS UP. \n\n8. The Parasympathetic Division generally RETARDS ORGANS or SLOWS DOWN.
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Tasting, smelling, seeing, hearing, thinking, dreaming, breathing, heart beating, moving, running, sleeping, laughing, singing, remembering, feeling pain or pleasure, painting, writing...you couldn't do any of these things without your central nervous system! \n\nWhat is the nervous system? \nMade up of your brain, your spinal cord, and an enormous network of nerves that thread throughout your body, it's the control center for your entire body. Your brain uses information it receives from your nerves to coordinate all of your actions and reactions. Without it, you couldn't exist! \n\nWhat are nerves? \nThey're the thin threads of nerve cells, called neurons that run throughout your body. Bundled together, they carry messages back and forth just the way that telephone wires do. Sensory nerves send messages to the brain and generally connect to the brain through the spinal cord inside your backbone. Motor nerves carry messages back from the brain to all the muscles and glands in your body. \n\nSo how do they they pass along messages? \nThrough the marvels of chemistry and a kind of electricity! Neurons are thin. Some are very small, and some can be three feet long! All are shaped somewhat like flat stars which have, to varying degrees, been pulled at each end so that they have long fingers. The fingers of one neuron almost reach to the next neuron. \n\nWhen a neuron is stimulated -- by heat, cold, touch, sound vibrations or some other message -- it begins to actually generate a tiny electrical pulse. This electricity and chemical change travels the full length of the neuron. But when it gets to the end of finger-like points at the end of the neuron, it needs help getting across to the next extended finger. That's where chemicals come in. The electrical pulse in the cells triggers the release of chemicals that carry the pulse to the next cell. And so on and so on and so on. \n\nSource(s):\n\nsearch engine: ask.com\nkey words: The Nervous System\n(This is pretty broad in nature, is there a specific question related to an answer you need that I can help you with?\nohhhhhh...nurse?????
130950
See the below link of the definition of muscarinic.  My best guess is that it is a type of neural receptor that takes in this stuff called muscarinic, which would be a good thing since it is highly toxic stuff to have in your body.  The receptor would be a good thing in the brain because it would recieve the toxic alkaline, therefore removing it from the environment of the brain. \n\nThis is just my best guess based on limited psychology classes and wikepedia.  Good luck!
414945
Its overall function is to collect information about the external conditions in relation to the body's internal state, to analyze this information, and to initiate appropriate responses to satisfy certain needs (Maintain Homeostasis). The most powerful of these needs is survival.
236271
In biology "agonist" is used for a substance  which combine with an organ's receptor and activates its action. It is also used for a muscle. \n\nThe term "antagonist" refers to a substance which will block the receptor. It is also used to the opposing muscle (when one muscle contracts, the other relaxes).
405362
do you mean how does aricept affect the shortage of blood flow to the brain?I am not sure it does. aricept increases the levels of acetycholine which increases cholingeric function used because a decrease in cholingeric function maybe the sause of alzheimers and is used for mild dementia I am not sure if it should maintain or improve intellectual functioning I found a drug book that states ther is no evidence that the drug alters the course ofthe underlying dementing process
1035895
My recollection is that muscarinic receptors cause vasodilation.  This is supported by the resource below: \n  \n"ACh on Blood flow: \n\nA very tricky question.  The only place one finds muscarinic receptors on blood vessels is in some of them supplying skeletal muscles.  In this case, ACh is released from sympathetic nerves.  Following our "Fight or Flight" scenario, we can predict that ACh will dilate these vessels.  However, if we give an i.v. dose of ACh, heart rate will go down (parasympathetic action) and this may decrease blood flow in the total system. \n"
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Pain is a fairly universal defense mechanism of life forms. It is nothing but the message (along neural cells) to the rest of the body (or at least the closest node in the nervous system) that something is wrong, so that the body can react by sending repair and defence agents. \n\nFish are vertebrates, and all vertebrates have a brain which coordinates most of their bodily functions. Mammals aren't that different from fish in this regard. Fish have more different sensory organs than mammals, all of which are coordinated in the brain.\n\nThere are also autonomous neural systems in vertebrate bodies. The intestines are a complex, self-regulating neural system with only little communication with the brain.\n\nIt is perfectly possible to make a fish "drunk" (i.e. reduce coordination of neural activity) by exposing it to chemicals. What levels of alcohol are required for it to act as a neurotoxic substance may differ from air-breathers, since the respiratory organs may be a better conductor for alcohol into the blood than the intestinal organs. Or in other words, think of inhalable alcohol.
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When a nerve impulse reaches a synapse, this releases signaling chemicals called neurotransmitters. These substances travel a short distance to the membrane of the next cell, where they attach to receptors. The binding of neurotransmitters to membrane receptors helps transfer electrical signals from cell to cell. \n\nReceptors are located in the membranes of the dendrites or cell bodies. One important feature of receptors is that they bind to specific types of nerve-signaling chemicals (neurotransmitters). In most cases, the binding of neurotransmitters will lead to the movement of specific molecules through the cell membrane (via a channel). This process passes the electrical (nerve) impulses. \n\nReceptor cells - receive information from the environment.\nSensory neurons - messages travel from the receptor cells through the sensory neurons to the spinal cord and brain.\nInterneurons - connect sensory neurons to the motor neurons.\nMotor neurons - messages travel from the brain and spinal cord through motor neurons to the muscles and glands\nEffector cells - cells stimulated by the motor neurons.
592754
it has so many functions.. all concerning autonomic actions (involuntary actions) - \nthe most important are: \n1- control of cardiac activity (it has 2 centers: cardiac accelerating and inhibitory centers)\n2- control of respiration (via dorsal and ventral motor neurones)\n3- regulation of heart rate and respiratory rate via central chemoreceptors\n4- regulation of arterial blood pressure by controlling the diameter of arterioles via vaso-motor center\n5- control of vital actions as swallowing ...etc
77894
as for the little i know its the energy molecule. cells use it to perform other tasks. i think one is to take in insulin and to operate some voltage gated channels. and i believe it is used in muscle fibers to retract.