Terms : Hide Images
| 2458135740 | neuron | nerve cell | 0 | |
| 2458135741 | nerve | bundle of neurons | 1 | |
| 2458139088 | sensory neuron | binds to / responds to external & internal stimulus | 2 | |
| 2458140365 | relay neuron (interneuron) | sends messages to relay or motor neurons | 3 | |
| 2458143596 | relay neuron (interneuron) | nerves found primarily in brain & spinal cord | 4 | |
| 2458145051 | motor neuron | synapses with effector | 5 | |
| 2458148857 | central nervous system | brain and spinal cord make up the ____ | 6 | |
| 2458150286 | peripheral nervous system | branching nerves make up the ____ | 7 | |
| 2458151584 | dendrite | part of neuron that receives a stimulus | 8 | |
| 2458154228 | ganglia near spinal cord | where are the cell bodies of sensory neurons located? | 9 | |
| 2458156167 | ganglia in spinal cord | where are the cell bodies of motor neurons located? | 10 | |
| 2458158899 | axon | part of neuron that sends action potential to the endings if threshold potential is reached | 11 | |
| 2458161319 | axon ending | part of neuron where neurotransmitters are released | 12 | |
| 2458164672 | broken down by an enzyme, taken back up by original neuron | eventually, neurotransmitters in the synaptic cleft will be ____ or ____. | 13 | |
| 2458168900 | myelin sheath | surrounds the axon arm | 14 | |
| 2458170013 | nodes | gaps in myelin sheath | 15 | |
| 2458172608 | voltage sensitive gated channels for Na and K ions | nodes are where ____ are located | 16 | |
| 2458175428 | schwann lipid rich cells | the myelin sheath is made up of | 17 | |
| 2458182905 | acetylcholine | allows motor neurons to synapse with skeletal muscles | 18 | |
| 2458183927 | dopamine | plays a role in skeletal muscle movement and reward pathway | 19 | |
| 2458187450 | motor cortex | people with parkinsons cannot effectively control their muscles because of a defect in the ____ | 20 | |
| 2458191363 | pain withdrawal, kneejerk | what are the 2 main types of somatic / spinal reflexes? | 21 | |
| 2458195787 | sensory to relay to motor | what path does an action potential take in a pain withdrawal reflex? | 22 | |
| 2458197473 | sensory to motor | what path does an action potential take in a knee-jerk response? | 23 | |
| 2458207198 | cerebrospinal fluid | the spinal lumen and brain ventricles contain ____ | 24 | |
| 2458215175 | gray matter; rich in cell bodies | the center of the spine contains ____ because it is ____ | 25 | |
| 2458218432 | white matter; rich in myelinated axons | the outer part of the spine contains ____ because it is ____ | 26 | |
| 2458237543 | ventral root | motor neurons connect to effectors via the ____ | 27 | |
| 2458239382 | dorsal root | sensory neurons connect to relay neurons via the ____ | 28 | |
| 2458244097 | reflex arc | very quick response to stimulus without directly synapsing to brain | 29 | |
| 2460077975 | -70mv; negative | at rest, a neuron has a membrane potential of ____, meaning it is more ____ than the outside | 30 | |
| 2460083289 | 2 K, 3 Na | the pump in a neuron pumps ____ for every ___ | 31 | |
| 2460089076 | depolarization | when the neuron shifts from negative to positive | 32 | |
| 2460095078 | sodium channels | during depolarization, ____ open | 33 | |
| 2460096724 | threshold potential | when enough Na ions enter the neuron, the ____ is reached | 34 | |
| 2460330908 | voltage sensitive gates | the ____ open when the threshold potential is reached | 35 | |
| 2460332144 | wave of depolarization | when Na ions flood the axon, a ___ results where each set of voltage sensitive gates open | 36 | |
| 2460339304 | K channel, voltage sensitive K channel | the ____ and ____ open slightly after the wave of depolarization, beginning the return to resting potential | 37 | |
| 2460341187 | Na K pump | the ____ completes the return to resting potential | 38 | |
| 2460342661 | hyperpolarization | when a stimulus causes k ion channels in the dendrite region to open | 39 | |
| 2460344919 | +10 mv | what is the threshold potential? | 40 | |
| 2460347269 | Ca2+ | at the axon endings, ___ enter the neuron | 41 | |
| 2460350093 | prevents | hyperpolarization ___ a wave of depolarization | 42 | |
| 2460353460 | leave | when inhibitory neurotransmitters bind to a receptor, k ions ____ the cell | 43 |
