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Lab 14 & 15
| Question | Answer |
|---|---|
| Endoneurium | Loose CT that surrounds the individual axons |
| Perineurium | Fibrous CT that surrounds fascicles |
| Epineurium | Fibrous CT that surrounds the outer surface of a nerve |
| Cross Section of a nerve | show myelinated/nonmyelinated axons |
| Medullated nerve | Nerve coated in myelin |
| Soma | contains the nucleus & most of the major organelles |
| Processes | extensions of the cell body |
| Axon | a fiber that emerges from the cell body & projects to target cells |
| Dendrites | neuron processes that receive info from other neurons at contact |
| Synapses | where two neurons contact |
| Axon hillock | where the axon emerges from the cell body |
| Myelin | insulating substance made from glial cells |
| Node of Ranvier | gaps in the myelin covering an axon; determines how electrical signals travel down the axon/ |
| Oligodendrocytes | cells that produce the myelin sheath in CNS (Central Nervous System) |
| Schwan cells | cells that produce the myelin sheath in PNS (Peripheral Nervous System) |
| Nervous tissue's cells | Neurons & Glial cells |
| Neurons | responsible for the computation & communication that the nervous system provides |
| Neurons | electrically active & release chemical signals to target cells |
| Glial cells/ glia | support nervous tissue |
| Nerves | bundles of axons in the PNS |
| Tracts | Bundles of nerves in the CNS |
| CNS | brain & spinal cord |
| PNS | all the nerves carrying info to & from the CNS |
| Axon terminal | end of the axon where it meets the target cell |
| 4 major regions of the adult brain | cerebrum, diencephalon, brain stem, & cerebellum |
| nervous system region | gray matter & white matter |
| Gray matter | regions w/ many cell bodies & dendrites |
| White matter | regions w/ many axons |
| Cerebrum | makes up most of the brain mass |
| Cerebral cortex | wrinkled portion |
| Longitudinal fissure | separates the cerebrum into right & left cerebral hemisphere |
| Corpus Callosum | the white matter provides the major pathway for communication between the cerebral cortex hemispheres |
| Longitudinal fissure | separates cerebrum & cerebellum. |
| Gyrus | ridge of one of those wrinkles |
| Sulcus | groove between 2 gyri (gyrus) |
| Lateral sulcus | separates the temporal lobe from the other regions |
| Central sulcus | separates Frontal & Parietal sulcus |
| Parietooccipital sulcus | separates parietal & occipital lobes |
| Postcentral gyrus | primary sensory cortex |
| Postcentral gyrus | posterior to the central sulcus |
| Precentral gyrus | primary motor cortex |
Created by:
FuirzH