. The chemistry and physiology of growth. Growth; Biochemistry. DIFFERENTIAL GROWTH I75 shaped pattern. Cell movements and divisions will be directed at the area, instead of around it as in the preceding example. Many embry- onic invaginations ( blastopore, neural tube, nasal pits) seem to take their origin from such localized contractile centers in the surface coat of the germ (24),. Figure 2. Diagrams illustrating the effect of local contraction (top) and local ex- pansion (bottom) on the structure of a reticular matrix. It was very illuminating to find that certain biochemical activitie
. The chemistry and physiology of growth. Growth; Biochemistry. DIFFERENTIAL GROWTH I75 shaped pattern. Cell movements and divisions will be directed at the area, instead of around it as in the preceding example. Many embry- onic invaginations ( blastopore, neural tube, nasal pits) seem to take their origin from such localized contractile centers in the surface coat of the germ (24),. Figure 2. Diagrams illustrating the effect of local contraction (top) and local ex- pansion (bottom) on the structure of a reticular matrix. It was very illuminating to find that certain biochemical activities attending growth and differentiation may lead to the same type of ex- pansion and contraction patterns (45). The expansion type, for in- stance, is observed around areas with proteolytic activity. When a local process dissolves part of an erstwhile coherent protein network, the re- maining portion, owing to its elastic tension, retracts from the hole and assumes a pattern like that shown in Figure 2 Be, much like a pierced cobweb. A contraction pattern such as in Figure 2 Ac, on the other hand,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Parpart, Arthur Kemble, 1903-; Princeton University; Northrop, John Howard, 1891-. Princeton, Princeton Univ. Press
Size: 1742px × 1434px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorprincetonuniversity, bookcentury1900, booksubjectgrowt
