Seeley's Anatomy Chapter 11-13 Questions and Answers| Latest Update

Seeley's Anatomy Chapter 11-13 Questions
and Answers| Latest Update

dendritic spine little protuberance where axons synapse with dendrite




axons can branch to form collaterals




trigger zone site where action potentials are generated




axoplasm cytoplasm of axon




axolemma plasma-membrane of axon




functional classification of neurons sensory ( afferent), motor ( efferent), interneurons/
association neurons



sensory ( afferent) action potentials toward CNS




motor ( efferent) action potentials away from CNS




Interneurons/ association neurons within CNS from one neuron to another

, structural classification of neurons multipolar, bipolar, unipolar




multipolar many dendrites with a single axon




bipolar one dendrite and one axon




unipolar single process that divides into two branches




neuroglia of the CNS astrocytes, ependymal cells, microglia, and oligodendroccytes




astrocytes - covers neurons and blood vessels

- regulates substances between the CNS and blood



blood brain barrier protects from toxic substances




choroid plexus secretes cerebrospinal fluid




microglia specialized macrophages




oligodendrocytes form a myelin that surrounds portions of several axons