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Nervous System
| Term | Definition |
|---|---|
| Astrocytes | Found in CNS Control chemical environment of brain Clean up leaked K+ ions Recapture released neurotransmitters |
| Microglia | Found in CNS Monitor neuron health Dispose of debris |
| Ependymal Cells | Found in CNS Circulate CSF with cilia Cushion CNS |
| Oligodendrocytes | Found in CNS Create myelin sheath |
| Schwann Cells | Found in PNS Form myelin sheath |
| Satellite Cells | Found in PNS Act as cushioning to protect cells |
| Dendrites | Convey messages toward the cell |
| Axons | Convey messages away from the cell |
| Tract | Bundle of nerve fibers in the CNS |
| Nerves | Bundle of nerve fibers in the PNS |
| What are the four major regions of the brain? | Cerebral Hemispheres Diencephalon Brain Stem Cerebellum |
| Cerebral Cortex | Speech Memory Logic Emotional Response Consciousness Sensation Voluntary Movement |
| Primary Somatic Sensory Area | In parietal lobe Senses pain, coldness and light touch |
| Occipital Lobe | Vision |
| Temporal Lobe | Olfactory |
| Frontal Lobe | Primary motor area |
| Broca's Area | Very involved in speech Only found in one hemisphere, usually left |
| Anterior Frontal Lobe | Intellectual reasoning Socially Acceptable Behaviors |
| Posterior Association Area | Recognizes faces and patterns Also a speech center Only found in one hemisphere |
| Diencephalon | Encased by cerebral hemispheres Contains: Epithalmus Thalmus Hypothalmus |
| Thalmus | Acts as relay center for sensory impulses passing upwards to sensory cortex |
| Hypothalmus | Regulates body temperature, water balance, metabolism Also center of drives and emotions |
| Epithalmus | Forms roof of 3rd ventricle Contains pineal gland and choroid plexuses of 3rd ventricle |
| Choroid Plexuses | Forms CSF |
| The Brain Stem Consists of: | Midbrain Pons Medulla Oblongata |
| Midbrain | Contains reflex centers involved with vision and hearing |
| Pons | Plays important role in respiration Means "bridge" Most fiber tracts found here |