BIOL 20300 Study Guide - Quiz Guide: Schwann Cell, Monocyte, Oligodendrocyte
23 Aug 2016
School
Department
Course
Professor
Document Summary
All-or-none phenomenon - this applies to single muscle fibers and motor units. That is, a stimulus is either sufficient to cause a maximum contraction, or it is subthreshold and there is no contraction at all. Therefore, activation of a single motor neuron causes maximum contraction of all the muscle fibers in the motor unit. Astrocytes - star-shaped cells found between neurons and blood vessels. This process is involved in the transport of organelles (such as synaptic vesicles, mitochondria) through the axon. Axoplasmic flow - a slow process which is responsible for carrying soluble proteins synthesized in the cell body down to the axon terminals. Characteristics of cardiac muscle - involuntary, striated, branched, uni-nucleated. Characteristics of skeletal muscle - voluntary, striated, non-branched, multi- nucleated. Characteristics of smooth muscle - involuntary, non-striated, non-branched, uni- nucleated. Ependymal cells - like epithelial cells, they line the ventricles of the brain and the central canal in the spinal cord.
