"all-ornothing" event. Explain what is meant by this phrase. This means that once the threshold is met‚ an action potential occurs. If the stimulus is too small an action potential does not occur. An action potential is usually initiated in an axon at or near what? The axon hillock‚ the initial segment‚ and the trigger zone. The adequate stimuli for olfactory receptors are chemicals‚ typically odorant molecules. Which of the following modalities will induce the largest amplitude receptor potential in the
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Elements 1 Neurons: The Basic Elements of Behavior Introduction to Psychology 101 Elements 2 The Basic Elements of Behavior The human body is a tremendous creation that is quite capable of performing a multitude of multifaceted movements and thoughts. In addition to its’ ability to move and think‚ the human body also allows numerous senses to become involved throughout ones daily routine. A person’s ability to think‚ remember‚ and experience emotion are all results of the body’s
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perfect for carrying the electrical messages that The Nervous Systemare the "language" of the nervous system.neurons are made up of a nucleus‚dendrite‚axon and axon terminals. the nucleus keeps the neuron alive and also carries the nuerons dna. the dentrites extend out to the synapses to pick up the electrical connection from the upstream neuron. the axon extends from the cell body to terminal endings and transmits the signal. The larger
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neurons is actually a "communication cable "inside our bodies. Neuron structure is basically the cell nucleus‚ the dendrites which receive information‚ and the axon which is responsible for the transference of the information. The information is transmitted via electrical pulses: an electric pulse is absorbed in the dendrite‚ passes through the axon and reaches the target organ or another
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learning‚ memory‚ and sleep. Dopamine affects a persons movement‚ attention‚ and learning. Axon An Axon is a long‚ slender projection of a nerve cell‚ or neuron‚ that typically conducts electrical impulses away from the neuron’s cell body transmiting neuroal signals. The axon is the tail-like part of the neuron where sinformation exits the cell. It helps in the transmit information. The function of the axon is to transmit information to different neurons‚ muscles and glands. Myelin sheath Myelin
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bundle of axons‚ and some nerves are less sensitive to lidocaine. If a nerve‚ rather than an axon‚ had been used in the lidocaine experiment‚ the responses recorded at R1 and R2 would be the sum of all the action potentials (called a compound action potential). Would the response at R2 after lidocaine application necessarily be zero? Why or why not? Your answer: Not necessarily because as it says in the first sensitive "some nerves are less sensitive to lidocaine" which means the axons found in those
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is made up of an axon‚ dendrites and a cell body. The nucleus and cytoplasm are contained in the cell body. The axon starts from the cell body‚ dividing into smaller branches and then ends at the nerve terminals. The dendrites also branch from the cell body‚ receiving information from the other neurons. Axons from other neurons forms synapses at their ends‚ which cover the cell body and dendrites.(Myers‚ 2013)Neurons send messages by passing impulses through their axons. The axons have different lengths
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extensions that extend out from the cell body. There are two types of these extensions; dendrites‚ which are extensions of the neurons that receive signals and then send them to the cell body; and axons which are extensions of neurons that send signals away from the cell body to other cells. both dendrites and axons can extend far away from the cell body to be as long as three feet. As well as sending
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branched dendrites and a long axon. -The axon is insulated by a fatty material called a myelin sheath. It needs insulation because ‘electricity’ goes through it. -The cell body is found midway along the long axon. -The direction of movement of the impulse is always from the sense organ to the CNS. Motor neurones: -The dendrites of a motor neuron are connected to the cell body at one end of the nerve cell (which is connected to the CNS) -The long axon (insulated too by myelin sheath)
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means an illness that occurs when the body tissues are attacked by its own immune system. In this case they begin attacking nerve cells which communicate with muscles. They attack the myelin sheaths surrounding the axons of the nerve cells. In some cases they have been known to attack the axons themselves. The first known incident of Guillain-Barre syndrome was reported in 1859 by a Frenchman named Jean Baptiste Octave Landry de Thezillat. Landry published a report after analyzing 10 patients with
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