To investigate the mechanism whereby changes in plasma glucose level alter human pancreatic A-cell activity in vivo, A-cell activity was determined during manipulation of plasma glucose and pancreatic B-cell activity by insulin and glucose infusions. A-cell activity (the acute immunoreactive glucago
How much does the cell boundary contract in a monolayered cell sheet?
โ Scribed by Hisao Honda; Goro Eguchi
- Book ID
- 104155346
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 595 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0022-5193
No coin nor oath required. For personal study only.
โฆ Synopsis
The method is developed to know how much the cell boundary contracts in a pattern consisting of convex polygonal cells with no gaps nor overlaps; when a cellular pattern is given, we can make it into another pattern whose total boundary length becomes shorter than the original, without reducing the area of each cell. By repetition of such procedure, (1) it can predict the hypothetical cellular pattern whose boundary length has approximated to the shortest possible and, (2) it can estimate the s value, which indicates the degree of lack of boundary shortening of the cellular pattern. The method is applied to several cellular and artificial patterns~ cultured epithelial ceils in monolayers from lung and pigment retina, epidermis of plant leaf, twodimensional arrangement of soap bubbles, etc. The results are discussed in 9 relation to recent knowledge on contractile microfilaments in organized cells.
๐ SIMILAR VOLUMES