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| the body's nervous system is |
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| an elaborate, interlaced network of nerve cells of astronishing complexity and sophistication |
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| brain, spinal cord, and nerves |
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| this system functions in order to |
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| regulate and coordinate body activities and bring about responses by which the body adjusts to changes in its internal and external environment |
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| The central nervous system (CNS) consists of |
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brain and spinal cord.
processes and stores sensory info and includes the parts of the brain governing consciousness. |
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| The peripheral nervous system (PNS) consists of |
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| all other nervous tissue outside the CNS |
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| The PNS includes how many cranial nerves, spinal nerves, & sensory nerves? |
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| 12 pairs of cranial nerves, 31 pairs of spinal nerves, all sensory nerves, and the sympathetic and parasympathetic nerves. |
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| The sympathetic and parasympathetic are part of |
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| (ANS)-Autonomic Nervous System |
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| regulates involuntary muscle movements and the action of glands |
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| the cell body of each neuron contains: |
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| DNA in its nucleus, endoplasmic reticulum, and ribosomes for buiding proteins, and mitochondria for making energy |
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| cell specialized to initiate or conduct electromechanical impulses and to react to physical and chemical changes in its surroundings. |
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| brain is the control center for |
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| information: receives, processes, and responds |
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| axons may be sheathed in myelin and many tiny braches called dendrites. |
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| carry impulses away from the cell body towards other neurons |
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| transmit impulses to the CNS |
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