Nervous System & Nervous Tissue
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| an action potential is just an: | electrical impulse
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| the ___ is always the same regardless of stimulus | impulse
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| the nervous system is ___ | the master controlling & communicating system of the body
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| 3 functions of the nervous system: | sensory input, integration & motor output
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| sensory input | monitor changes in & outside body
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| integration | processes & interprets sensory inpt
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| motor output | activates effector organs
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| the muscles & glands cause a response in the __ __ | motor output
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| cells communicate via ___ | electrical & chemical signals
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| central nervous system (CNS) consists of: | brain & spinal cord
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| what is the integrating & control center system of the nervous system? | CNS
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| the peripheal nervous system (PNS) consists of: | nerves (bundle of axons)
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| the 2 type of nerves found in the PNS are: | spinal & cranial nerves
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| spinal nerves | carry impulses to & from spinal cord
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| cranial nerves | carry impulses to & from brain
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| these peripheal nerves serve as communication lines that link all parts of the body to the ___ | CNS
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| 2 functional subdivisions of the PNS are: | sensory & motor division
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| sensory (afferent) division | carries impulses toward CNS
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| motor (efferent) division | transmits impulses away from CNS
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| the 2 motor divisions are: | somatic & autonomic nervous system
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| somatic nervous system is also known as the __ | voluntary nervous system
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| somatic nervous system | conducts impulses away from CNS to skeletal muscle
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| autonomic nervous system | regulates smooth & cardiac muscles, glands
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| the hypothalamus is in control of this nervous system. | autonomic nervous system
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| this is known as the involuntary nervous system. | autonomic nervous system
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| 2 divisions of the autonomic nervous system? | sympathetic & parasympathetic
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| sympathetic |
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| nervous tissue is made up of 2 principal cells __ and __ | neurons & neuroglia
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| this is known as the resting & digestion system. | parasympathetic
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| neurons | transmit electrical signals
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| neuroglia | surround & wrap neurons
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| neuroglia is also called __ cells | glial
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| axons rely on cell body to renew ___ | proteins & membranes
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| long axons are called: | nerve fibers
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| dendrites collect info with ___ | dendritic spines
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| ___ generate nerve impulses | axons
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| what does the IPSP do? | drives neuron away from threshold
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| what does the EPSP do? | brings neuron closer to the threshold
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| postsynaptic synapse | receives the info - neuron transmits electrical signal away from synapse
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| presynaptic synapse | sends the info - neuron conducting impulses toward synapse
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| ___ neurons are unipolar | sensory
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| ___ neurons are multipolar | motor
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| ___ lies between the sensory & motor neurons | interneurons
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| action potential | electrical impulse that goes down axon
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| graded potential | short-lived, incoming signals operating over short distances
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| ___ is the principal means of long distance neural communication | action potential
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| ___ is the principal way neurons send signals | action potential
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| neurons are classified by 3 processes. what are they? | multipolar, unipolar, and bipolar
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| multipolar | 3 or more porcesses - 1 axon, others dendrites
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| unipolar | 1 short process
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| bipolar | 2 processes - 1 axon, 1 dendrite
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| nonmyelinated fibers conduct impulses ___ slowly | more
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| myelin sheath function: | protects & insulates axon - increases speed of nerve impulse transmission
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| what does the neuron cell body do? | synthesizes proteins, membranes & other chemicals
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| groups of cell body in CNS Are called: | nuceli
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| groups of cell body in PNS are called: | ganglia
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| most abundant and versatile glial cell are: | astrocytes
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| astrocytes cling to ___ | neurons, synaptic endings & capillaries
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| microglial cells | helps when neurons get injured
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| ependumal cells | line central cavities of brain & spinal column - ciliated
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| which glial cell participate in infortmation processing in the brain? | astrocytes
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| satellite cells | surround cell body of neuron
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| schwann cells | surrounds axons of a neuron to form muelin sheaths
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| this glial cell is vital to regeneration of damaged axons. | schwanna cells
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| oligodendrocytes | branched cells that wraps around axons
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Created by:
Mariahj25
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