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        | neurotransmitter chemical released at the ends of some nerve cells |  | 
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        | middle layer of the tree membranes (meninges) that surround the brain and spinal cord. |  | 
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 | Definition 
 
        | Nerves that control involuntary body functions of muscles, glands, and internal organs. |  | 
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 | Definition 
 
        | Microscopic fiber that carries the nervous impulse along a nerve cell. |  | 
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 | Definition 
 
        | lower portion of the brain that connects the cerebrum with the spinal cord. The pons and the medulla oblongata are part of the brainstem. |  | 
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        | Term 
 
        | central nervous system (cns) |  | Definition 
 
        | Brain and the spinal cord |  | 
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 | Definition 
 
        | Part of the brain that coordinates muscle movements and maintains balance. |  | 
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 | Definition 
 
        | outer region of the cerebrum; containing sheets of nerve cells; gray matter of the brain. |  | 
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        | Term 
 
        | cerebrospinal fluid (CSF) |  | Definition 
 
        | Fluid that circulates throughout the brain and spinal cord. |  | 
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 | Definition 
 
        | Largest part of the brain; responsible for voluntary muscular activity. vision, speech, taste, hearing, thought, and memory. |  | 
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        | Term 
 | Definition 
 
        | thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord. |  | 
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 | Definition 
 
        | portion of the brain beneath the thalamus; controls SLEEP, APPITITE, BODY TEMP, AND SECRETIONS FROM THE PITUITARY GLAND |  | 
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        | Term 
 | Definition 
 
        | the part of the brain just above the spinal cord; contols brathing , heart beat, and size of blood vessels; nerve fibers cross over here. |  | 
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        | Term 
 | Definition 
 
        | three protective membranes that surround the brain and spinal cord |  | 
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        | Term 
 | Definition 
 
        | carry messages away from the brain and spinal cord to muscles and organs |  | 
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        | Term 
 | Definition 
 
        | macroscopic structure consisting of axons and dendrites in bundles like strands of rope. |  | 
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        | Term 
 | Definition 
 
        | a nerve cell; carries impulses throughout the body. there are about 10 billion neurons. |  | 
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        | Term 
 | Definition 
 
        | Involuntary, autonomic nerves that help regulate body functions like heart rate and respiration |  | 
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        | Term 
 
        | peripheral nervous system |  | Definition 
 
        | Nerves outside that brain and spinal cord; cranial, spinal and autonomic nerves |  | 
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        | Term 
 | Definition 
 
        | Large, interlacing network of nerves. |  | 
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        | Term 
 | Definition 
 
        | organ that receives a nercous stimulation and passes it on to nerves within the body. the skin, ears,eyes, and taste buds are receptors. |  | 
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        | Term 
 | Definition 
 
        | carry messages to the brain and spinal cord from a receptor |  | 
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        | Term 
 | Definition 
 
        | change (light, sound, touch)in the internal or external enviroment that evokes a response |  | 
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        | Term 
 | Definition 
 
        | autonomic nerves that influence body functions involuntarily in times of stress |  | 
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        | Term 
 | Definition 
 
        | the space through which a nercous impulse is transmitted from one neuron to another or from a neuron to another cell, such as a muscle or gland cell. |  | 
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        | Term 
 | Definition 
 
        | meninges herniate outward |  | 
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        | Term 
 | Definition 
 
        | spinalcord and meninges herniate outward |  | 
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