explain apical constriction
– apical constriction is the narrowest diameter of the RC- typically 0.5-1.0mm short of the centre of the apical foramen- apical constriction = minor constrictor. learning point = establish working length 0.5-1.0mm from APICAL FORAMEN NOT ANATOMICAL OR RADIOGRAPHIC APEX.
Apical constriction is a biological process that occurs during the development of certain organisms, such as animals and plants. It is a process by which a group of cells at one end of an embryo contract, leading to the narrowing of the cell cluster.
This process is essential for the formation of certain structures in the developing embryo, such as the neural tube and the formation of various organs. The mechanism of apical constriction involves the contraction of actomyosin fibers, which are found in the cell cortex. These fibers generate mechanical tension, which causes the cell to change shape and become narrower at the apical end.
During apical constriction, there are changes in the gene expression and cytoskeletal organization of the cells involved. The process is controlled by complex signaling networks that ensure the proper assembly and function of the actomyosin fibers.
Overall, apical constriction is a critical process in the embryonic development of many organisms and plays a vital role in the formation of structures that are necessary for normal growth and development.