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| Neurotransmitter chemical released at the ends of some nerve cells |
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| Middle layer of the three membranes ( meninges ) that surround the brain and spinal cord. The greek arachne means " spider" |
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| a type of glial * neuroglial) cell; connective, supporting of the nervous system astrocytes transport water and salt from capillaries |
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| Nerves that control involuntary body functions of mscles,glands, and internal organs |
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| Microscopic fiber that carries the nervous impulse along a nerve cell |
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| blood vessels (capillaries) that selectively let certain substances enter the brain tissue and keep other substances out |
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| Lower portion of the brain that connects the cerebrum with the spinal cord. The pons and medulla oblongata are part of the brainstem |
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| lower portion of the brain that connects the cerebrum with the spinal cord. the pons and medulla oblongata are part of the brainstem |
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| collection of spinal nerves below the end of the spinal cord |
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| part of a nerve cell that contains the nucleus |
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| central nervous system ( CNS) |
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| brain and teh spinal cord |
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| Part of the brain that coordinates muscle movements and maintains balance |
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| outer region of the cerebrum containing sheets of nerve cells; gray matter of the brain |
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| cerebrospinal fluid ( CSF ) |
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| Fluid that circulates throughout the brain and spinal cord |
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| largest part of the brain; responsible for voluntary muscular activity, vision speech taste hearing thought and memory |
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| microscopic branching fiber of a nerve cell that is the first part to receive the nervous impulse |
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| thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord; from the Latin, Meaning: "hard mother" |
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| a cell that lines the fluid-filled sacs of the brain and spinal cord |
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| a collective nerve cell bodies in the peripheal nervous system |
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| sheets of nerve cells that produce elevatino in the surface of the cerebral cortex; convolution |
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| portion of the brain beneath the thalamus; controls sleep appetite body tempature and secreations from the pituitary gland |
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| the part of the brain just above the spinal cord; controls breathing heart beat and the size of blood vessels nerve fibers cross over here |
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| three protective membranes that surround the brain and spinal cord |
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| one type of glial cell a micro glial cell is a phagocyte |
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| carry messages away from the brain and spinal cord to muscles and organs efferent ( ef=away) nerves. |
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| fatty tissue that surrounds, protects, and insulates the axon of a nerve cel. these sheaths are white in color ( white matter ) |
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| macroscopic structure onsisting of axons and dendrites in bundles like strands of rope |
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| a nerve cell; carries impulses throught the body. there are baout 10 billion neurons |
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| chemical messenger, released at the end of a nerve cell. it stimulates or inhibits another cell, which can be a nerve cell, muscle cell, or gland cell, examples of neuro transmitters are acetylcholine epinephrine dopamine and serotonin |
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| glial cell that forms the myeling sheath covering axons |
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| involunatry autonomic nerves that help regulate body functions like heart rate and respiration |
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| essential, distinguishing cells of an organ. Neurons are the parenchymail tissue of the brain. |
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| peripheral nervous system |
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| Nerves outside the brain and spinal cord; cranial spinal and autonomic nerves |
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| thin, delicate inner membrane of the meninges |
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| large, interlacing network of nervs. Examples are lumbar=sacral and brachial ( brachio means arm ) plexus. The term orginated from te indo-europeon plek meaning : to weave together: |
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| part of the brain anterior to the cerebellum and between the medulla and the rest of the brain ( latin pons means :bridge: ) it is a bridge connecting various parts of the brain |
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| organ that receives a nervous stimulation and passes it on to the nerves within the body. The skin, ears, eyes and taste buds are receptors |
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| carry messeages to the brain and the spinal cord from a receptor a ffrent ( af=toward) nerves. |
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| the space ( juncture ) through which a nervous impulse is transmitted from one neuron to another or from a neuron to another cell, such a s a muscle or gland cell. From the Greek synapsis "a point of contac" |
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| main relay center of the brain. It conducts impulses between the spinal cord and the cerebrum incoming sensory messages are relayed through the thalamus to appropriate centers in the cerebrum. The latin thalamus meaning: room: comes from the romans who thought this part of the brain was hollow--therefore resembeling a room. |
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| reservoirs * canals* in the interior of the brain that contains cerebrospinal fluid |
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