Botulism affects the neuromuscular junction of skeletal muscle, resulting in paralysis. Which vergence factor is botulism using to cause this.
Added by Matthew D.
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Botulism is caused by the botulinum toxin produced by the bacterium Clostridium botulinum. This toxin interferes with the normal functioning of the neuromuscular junction. Show more…
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Clostridium botulinum is a bacteria that produces a toxin. The toxin is deadly to most animals, because it prevents vesicle movement inside the axons of motor neurons. If a person were to consume food contaminated with Clostridium botulinum, which of the following would most likely occur? flaccid paralysis because their motor neurons would not be able to conduct action potentials along their axons. spastic paralysis because their motor neurons would release too much acetylcholine at the synapse with a muscle fiber spastic paralysis because their motor neurons would conduct too many action potentials along their axons. flaccid paralysis because their motor neurons would not be able to release acetylcholine at the synapse with a muscle fiber
Asma V.
Botulinums are potent neurotoxins produced by the bacillus, Clostridium botulinum. The toxins are proteins that bind to a receptor on the presynaptic membrane of neurons in peripheral cholinergic synapses. Botulinum toxins act at four different sites in the body: The neuromuscular junction, autonomic ganglia, postganglionic parasympathetic nerve endings, and postganglionic sympathetic nerve endings that release acetylcholine (such as sweat glands). Botox blocks neuromuscular transmission by binding to sites on motor or autonomic nerve terminals. The toxin-receptor complex is trafficked into the cell. Once released from the receptor, it cleaves SNAP-25, a protein critical to the successful docking and release of acetylcholine from vesicles situated within nerve endings. Typically, effects take a few days to manifest and persist for up to a few months. The affected nerve terminals do not degenerate, but the blockage of neurotransmitter release is irreversible. Function can be recovered by the sprouting of nerve terminals and formation of new synaptic contacts; this usually takes two to three months. Classified as a skeletal muscle relaxant, BOTOX (onabotulinumtoxin A) is a medication approved by the FDA for a number of indications. Botulinum toxins now play a very significant role in the management of a wide variety of medical conditions, especially strabismus and focal dystonias, hemifacial spasm, various spastic movement disorders, headaches, hypersalivation, hyperhidrosis, and some chronic conditions that respond only partially to other medical treatments. The list of possible new indications is rapidly expanding. An unlicensed preparation of botulinum toxin A, intended for research purposes, was illegally administered by a Florida physician to himself and three patients, including his girlfriend. The doctor was practicing without a medical license at the time. Within days, all four reported blurry vision, trouble swallowing, trouble speaking, and labored breathing. All were hospitalized and survived due to prompt emergency care. Identify the cranial nerves affected by the BOTOX that resulted in blurry vision, trouble swallowing, and trouble speaking clearly. Identify the muscles involved in blurry vision.
Adi S.
2) Botulism is a rare illness caused by botulinum toxin, a chemical produced by a specific type of bacterium found in certain contaminated foods. Botulinum toxin is extremely potent. Death can occur from only one microgram of botulinum toxin if inhaled. Botulinum toxin's potency stems from its ability to prevent the release of neurotransmitters such as acetylcholine (ACh). It interacts with the axon terminal, changing the characteristics of the terminal so neurotransmitters get stuck within the cytoplasm of the neuron and cannot exit. a) Based on the information given, which parts of muscle contraction (use the image above as a reference) would be most directly affected by botulinum toxin? b) What are the normal roles of those parts in muscle stimulation? c) What would happen differently in the presence of botulinum toxin and why? 3) Alpha-Bungarotoxin: The death adder is one of the most venomous snakes in the world. Death can occur in humans within six hours after being bitten. One of the components of death adder venom is alpha-bungarotoxin. This chemical binds irreversibly to and blocks acetylcholine (ACh) receptors in the neuromuscular junction. Recall the steps of initial steps of Muscle Contraction: a) Based on the information given about a death adder bite, which parts of muscle contraction (use the image above as a reference) would be most directly affected by a death adder bite? b) What are the normal roles of those parts in muscle stimulation? c) What would happen differently in the presence of death adder venom and why?
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