GC Chapter 12 Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
Division of PNS that brings sensory info to the NNS | Afferent Division |
Division of PNS that brings Motor commands to the muscles/glands from the CNS | Efferent Division |
Efferent Division of the PNS that controls motor function | Somatic Nervous System |
Efferent Division of the PNS that controls smooth muscle, cardiac muscle, adipose tissue, gland activity | Autonomic Nervous System |
Cytoplasm surrounding the neucleus | Perikaryon |
branches from the axon that can help the neuron communicate with many other cells | Collaterals |
Neuron found in brain/special sense organs, with undistinguishable axons and dendrites, found in brain/sense organs | Anaxonic Neurons |
Neuron that relay sight, sound or smell, have two process separated by a cell body, found in sight, sound and hearing organs | Bipolar Neuron |
Most common neuron in sensory neuron, has a single elongate process, with cell body off to the side, found in sensory nerves of PNS | Unipolar Neuron |
Most common neuron in CNS, motor neurons that control skeletal muscle, common in the CNS, skeletal muscle neurons | Multipolar Neuron |
Receptors that monitor the position and movement of the skeletal muscles and joints | Proprioceptors |
Neuroglia of CNS that line ventricles in the brain/central canal of the spinal cord, produces CSF | Ependymal Cells |
Neuroglia of CNS that maintains blood/brain barrier,absorbs and recycles neurotransmitters | Astrocytes |
Neuroglia of CNS that myelienate CNS axon, provide structural framework | Oligodendrocytes |
Neuroglia of CNS that remove debris,waste, pathogens by phagocytosis | Microglia |
Neuroglis of PNS that surround neuron cell bodies in ganglia, regulate O2 and CO2 nutrient and neurotransmitter levels around neurons in ganglia | Satellite Cells |
Neuroganglia of PNS that surround all axon of PNS to mylienate PNS axons | Schwann Cells |
temporary local change in the resting potential of the cell membrane, decreases with distance | Graded Potential |
electrical impulse that is spread along the surface of the axon, does not diminish as it moves away from the source | Action Potential |
a shift from the resting potential of the cell membrane closer to 0 | depolarization |
The process of restoring resting potential after depolarization | repolarization |
the loss of positive ions, causing an increase in the negativity of the resting potential, (-70mv to -80mv)decreases with distance | Hyperpolarization |
Initial refractory period lasting 0.4-1.0 msec | Absolute refractory period |
Refractory period when sodium channels return to resting condition, until membrane potential stabilizes at resting levels | Relative Refractory period |
Nerves of the Efferent division of Nervous system that innervates skeletal muscle | Somatic motor neurons |
Nerves of the Efferent division of Nervous system that innervate peripheral effectors, cardiac muscle, smooth muscle, glands,adipose tissue | Visceral Motor Neurons |
If resistance is high the current is | Small |
If resistance is low the current is | Large |
Channels that are always open but change shape in response to local conditions | Leak channels |
Channels that open/close in response to specific stimuli | gated channels |
Channels that open after binding with specific chemicals | Chemically gated channels |
Type of axon fibers, large diameter/myelinated, speeds up to 120m/s | Type A |
Type of axon fibers, smaller diameter/mylientated speeds up to 18m/s | Type B |
Type of axon fibers, smallest diameter/unmyelienated, speeds up to 1m/s | Type C |
Synapses in which membranes are locked together by gap junctions, in some areas of the brain, eye and in one pair of PNS ganglia | Electrical Synapses |
Most abundant type of synapse, cells are not directly coupled, postsynaptic cell is not a slave to the presynaptic cell | Chemical Synapses |
Neurotransmitter of Adrenergic synapses, distributed in the brain and portions of ANS | Norepinephrine |
CNS neurotransmitter that effects precise control of movement | Dopamine |
CNS neurotransmitter that effect a person's attention and emotional states | Serotonin |
CNS neurotransmitter that has an inhibitory effect | GABA |
gas generated by synaptic terminals that innervate smooth muscle in thw waslls of blood vessels in the PNS and synapses in several regions of the brain | Nitric Acid |
gas generated by specialized synaptic terminals in the brain, functions as a neurotransmitter | Carbon Monoxide |
Neurotubules, neurofilments, neurofibrils | Components of Neuron cytoskeleton |
Dense areas of RER and ribosomes, makes the appearence of gray matter | Nissl Bodies |
cytoplasm and perikaryon | Cell body |
80-90% surface area of neuron, fine processes that recieve info from other neurons | Dendrites |
Carries signal to target | axon |
Cytoplasm of axon, contains neurotubles neurofibrils, enzymes and organelles | Axoplasm |
Specialized cell membrane of axon, covers axoplasm | Axolemma |
Initial segment of axon | Axon Hillock |
Where a neuron communicates with another cell | Synapse |
Chemical Messengers that released at presynaptic membrane, affect postsynaptic membrane, broken down by enzyme and reassembled in the synaptic terminal | Neurotransmitters |
Afferent neurons of the PNS | Sensory Neurons |
Efferent neurons of the PNS | Motor Neurons |
Monitor internal systems, internal senses | Interoceptors |
Monitor external senses, distance senses | Exteroceptors |
Temporary, local changes in resting potential caused by a stimulus | Graded Potential |
electrical impulse, produced by graded potential, propogates along axon to the synapse | Action Potential |
slower movement of action potential down the axon, occurrs in unmyelienated axons | continuous propagation |
faster movement of action potential down the axon, occurs in myelienated axons, depolarization occurs only at nodes | saltatory propagation |
when a neurotransmitter cannot replenish fast enough to meet the demands of an intense stimulous | synaptic fatigue |
occurrs between arrival of action potential at synaptic terminal and effect of postsynaptic membrane | Synaptic delay |
neuromodulators that bind to same receptors as morphine and opium and relieve pain | opioid peptides |
graded potentials that occur in postsynaptic membrane in response to neurotransmitters, IPSP, EPSP | postsynaptic potential |
Graded hyperpolarization of postsynaptic membrane | IPSP |
graded depolarization of postsynaptic membrane | EPSP |
multiple EPSPs at one synapse | temporal summation |
stimuli arrive at multiple synapses | spatial summation |
when EPSPs accumulate to raise membrane potential closer to threshold so a small stimuli can trigger an action potential | facilitation |
Directly opens Cl- channels, directly opens K+ channels and block entry of Ca2+ | GABA |
Indirectly G protiens and second messengers, Directly opens Ca2+/Na+ channels on pre/postsynaptic membranes | Glutmate |
an enzyme complex coupled to a membrane receptor | G Proteins |
Created by:
100000860991270
Popular Nursing sets