what are the nerve terminals?
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The nerve terminal is a specialized region of a neuron, separated from the neuronal soma by an axon that can be exceedingly long, whose function is to release neurotransmitter when stimulated by an electrical signal carried by the axon.
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A nerve impulse begins when a neuron receives a chemical stimulus. The nerve impulse travels down the axon membrane as an electrical action potential to the axon terminal. The axon terminal releases neurotransmitters that carry the nerve impulse to the next cell.
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The sympathetic division of the ANS has: long postganglionic axons. norepinephrine as a transmitter substance. preganglionic neuron cell bodies in the T1-L2 regions of the spinal cord.
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Nerve fibre is the axon of neuron and a bundle of many such fibres makes a nerve. ... A neuron is a nerve cell which transmits information through axioms. There are one hundred billion neurons in the brain. Nerves send impulses to the brain to send signals to the body.
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Neurons are unique-looking little cells. ... These axon terminals are often located close to the dendrites of another neuron, forming a connection known as a synapse — despite the fact that the axon terminals do not physically touch the other neuron's dendrites.
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Axon terminals contain synaptic vesicles that store the neurotransmitter for release at the synapse. This makes multiple synaptic connections with other neurons possible. Sometimes the axon of a neuron may synapse onto dendrites of the same neuron, when it is known as an autapse.
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A synapse typically involves a junction between an axon terminal of one neuron, known as the presynaptic neuron, and the dendrites or cell body of a second neuron, known as the postsynaptic neuron. Less frequently, axon-to-axon or dendrite-to-dendrite connections occur.
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The somewhat enlarged, often club-shaped endings by which axons make synaptic contacts with other nerve cells or with effector cells. end-feet neuropodia terminal boutons.
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Most neurons have a cell body, an axon, and dendrites. The cell body contains the nucleus and cytoplasm. The axon extends from the cell body and often gives rise to many smaller branches before ending at nerve terminals.
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['Spinal nerves: They are peripheral nerves that carry sensory information into and motor commands out of the spinal cord.', 'Cranial nerves: They are the nerve fibers that carry information into and out of the brain stem.']
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Most current anatomy and physiology texts refer to the axon as branching into axon terminals, and at the ends of the terminals are synaptic knobs, synaptic end bulbs, or terminal buttons (depending on the text). ... Neurotransmitters are stored for use in the Axon Terminal, not in the Axon.
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['It is made up of numerous nerve cells.', 'Nerve cells are excitable and respond to external stimuli.', 'Nerve cells show conductivity by transmitting signals from one cell to the other.', 'Transmission of signals is through neurotransmitters.', 'The brain is the major organ.']
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A group of neurons form a nerve. Neurons are the structural and functional units of the nervous system. Nerve is an enclosed, cable-like bundle of axons and nerve fibers found in the peripheral nervous system. There are three types of nerves autonomic nerves, motor nerves, and sensory nerves.
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The primary components of the neuron are the soma (cell body), the axon (a long slender projection that conducts electrical impulses away from the cell body), dendrites (tree-like structures that receive messages from other neurons), and synapses (specialized junctions between neurons).
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[' sensory neurons—receive impulses and carry them from the sense organs to the spinal cord or brain.', ' interneurons—connect sensory and motor neurons and interpret the impulse; only in the brain and spinal cord.', ' motor neurons—carry impulses from the brain and spinal cord to muscles or glands.']
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The very end of a branch of a nerve's axon, a long slender nerve fiber that conducts electrical signals to a nerve synapse (the gap between nerve cells). The axonal terminals are specialized to release the neurotransmitters of the presynaptic cell.
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Axon terminals (also called synaptic boutons or terminal boutons) are distal terminations of the telodendria (branches) of an axon.