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zoo141 chap 11
neurophysiology
| Question | Answer |
|---|---|
| "PNS" sensory (afferent) division | includes somatic sensory receptors (position, touch, pressure, pain, temperature), special sensory receptors (smell, taste, vision, hearing, balance), visceral sensory receptors (monitor internal organs) |
| "PNS" motor (efferent) division | somatic nervous system (SNS, controls skeletal muscle) + autonomic nervous system (ANS, controls smooth muscle, cardiac muscle, glands, adipose tissue) |
| dendrites | neuronal processes that receive stimuli from environmental or other neurons |
| cell body contains? | contains nucleus and other organelles |
| perikaryon | cytoplasm surrounding nucleus |
| neurofilaments | similar to intermediate filaments |
| nissl bodies | clusters of RER and free ribosomes |
| axons | carry information toward other cells |
| axon hillock | base of axon (next to cell body) |
| axolemma | plasma membrane surrounding axoplasm |
| axoplasm contains | neurofibrils, neurotubules (used in axoplasmic transport of materials) |
| collateral branches | side branches of axons |
| telodendria | branches at end of axon |
| structure of synapse | site where presynaptic cell and postsynaptic cell communicate |
| synaptic knob | synaptic terminal of presynaptic cell |
| synaptic vesicles | contain neurotransmitters |
| synaptic cleft | space separating presynaptic and postsynaptic membranes |
| multipolar neurons | have multiple dendrites and one axon |
| bipolar neurons | have one dendrite and one axon |
| unipolar neurons | have only a single process leaving the cell body; axon starts at initial segment, where dendrites converge |
| anaxonic neurons | all cell processes look alike |