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Definition
nerve cells that pick up information.
gather information by detecting charges inside and outside of body. |
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Definition
Signals are brought together.
creates:
sensations, memories, thoughts, and perception |
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Definition
| Provides movement. Sends nerve impulses to other body regions by using effectors |
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Definition
| cells that recieve messages outside the nervous system. muscle cell=main |
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Definition
| voluntary, moves skeletal muscles (any limb movement) |
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| involuntary. moves cardiac and smooth muscle (heartbeat, breathing, kidney functions) |
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| What organs make up the central nervous system? |
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Definition
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| pns? peripheral nervous system |
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Definition
| everything that comes off of spinal cord and brain |
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| what are the four neuroglial(not nerve but helper cells) of the CNS |
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Definition
| microglial cells, oligodendrocytes, astrocytes, ependymal |
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Definition
| support the nervous and phagocytize bacteria and cellular debris. (algea eaters of nervous system) |
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Definition
| provide insulation around axons; called myelin sheets |
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Definition
| provide structrual support help regulate nurtients and ions |
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Definition
| covering tissues of brain and spinal cord (make meninges) |
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| schwann cells (neuroglial cell of the pns) |
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Definition
| form a covering called the myelin sheath around axons |
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Definition
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Definition
| the rounded end of the neuron that contains organelles |
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Definition
| part of the nerve cell that recieves messages, usually more than 1 short and branched |
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Definition
| part of the nerve cell that sends messages away, usually longer than dendrites |
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Definition
| lipid protein cell that surrounds the axon and provides it w/ insulation |
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| sensory neurons aka afferent neurons |
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Definition
| carry messages away from body to the brain and spinal cord |
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Term
| interneurons aka association neurons |
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Definition
| within the brain and spinal cord, link other neurons |
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| motor neurons aka efferent(to) |
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Definition
| goes to your body from the brain and spinal cord |
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Definition
| the way that impulses travel from 1 nerve to the next |
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Definition
| junction b.t where two neurons meeet has small gap |
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Definition
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Definition
| the process of crossing a synapse |
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Definition
| pouches of neurotransmitters that are in the synaptic knob |
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Term
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Definition
| biochemical that diffuses across synapse and reacts w. a dendrite on another neuron |
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Term
| what are the two types of neurotransmitters |
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Definition
| excitatory and inhibitory |
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Definition
| increases the dendrite permability and triggeers the nerve impulses. |
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Definition
| decrease the dendrite permability and make it less liekly that a nerve impulse will occur |
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Definition
| a group of nerve cells that perform a common function |
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Term
| facilitation (actions of a neuron pool) |
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Definition
| impulses come in and excite the neuron pool but no impulses go out |
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Definition
| axons of different areas head to same neurons |
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Definition
| impulses leave the neuron pool and go to dif. areas |
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Definition
| carry messages to the spine cord and brain |
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Definition
| carry messages from spinal cord and brain |
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Definition
| carry messages to and from |
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Term
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Definition
| outer most layer made of connective tissue and contains many nerves and blood vessels |
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Term
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Definition
| middle layer thing and wevved like and lacks blood vessels |
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Definition
| inner most than is thin and contains blood vessels to nourish the breain and spinal cord |
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Definition
| clear, watery fluid found between the arachnoid and pia matter surround the spinal cord and brain |
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Term
| functions of cerebrospinal flid |
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Definition
supports/protects the spinal cord and brain by absorbing foreces that may damage tihem.
maintain homeostasis of ions in CNS
PROVIDES A PATHWAY 4 nutrients and waste |
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Definition
| largest part of brain contains nerve center associated higher mental cunctions (conscience memory thoughts) |
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Definition
connect parts of nervous system.
regulates internal organs and processes sensory info |
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Definition
| coordinate voluntary muscular movements |
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| half of the cerebrum left and right hemi. |
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| nerve fibers that connect the hemispeheres in cerebrum |
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