منابع مشابه
Harvard Business Review
There is no question that in the last quarter century the work load of the executive has greatly increased. The top management man has new functions that he cannot possibly delegate completely; take, for instance, his new responsibilities in public relations and industrial relations. Businesses have grown in size, in complexity, and in geographical coverage; the duties and problems of the top e...
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Polarized epithelial cells create tightly packed arrays of microvilli in their apical membrane, but the fate of these microvilli is relatively unknown when epithelial cell polarity is lost during wound healing. In this issue, Klingner et al. (2014. J. Cell Biol. http://dx.doi.org/10.1083/jcb.201402037) show that, when epithelial cells become subconfluent, actomyosin contractions locally within ...
متن کاملMapping Your Every Move
In 2005, our authors discovered grid cells, which are types of neurons that are central to how the brain calculates location and navigation. Since that time, they have worked to learn how grid cells communicate with other types of neurons-place cells, border cells, and head direction cells-to affect spatial awareness, memory, and decision-making. Because the entorhinal cortex, which contains th...
متن کاملBackward waves move cells forward
dvancing cells periodically pull on their substrates to test the environment, say Grégory Giannone, Michael Sheetz (Columbia University, New York, NY), and colleagues. The actomyosin contractions both strengthen attachments to more solid substrates, and break off part of a signaling complex so that it can be carried into the cell. Once that retrograde signal reaches myosin, which is some distan...
متن کاملPulling Back to Move Forward
Animal cells can change shape and move by using actin polymerization to drive plasma membrane protrusion. Giannone and coworkers (this issue of Cell) describe how cells periodically pull back on these protrusions in order to sense and respond to the rigidity of their environment.
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ژورنال
عنوان ژورنال: African Journal of Business Management
سال: 2018
ISSN: 1993-8233
DOI: 10.5897/ajbm2018.8641