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Galvanotaxis - Modes of Cell Movement
Galvanotaxis considers to the movement of cells in response to a potential variation between cells. It is suggested that there are voltage differences among embryonic regions that could play an important role in morphogenesis. Minute electric fields of the order of 10 to 100 mv/mm appear to be enough to alter the direction of nerve growth. Nuccitelli and Erickson (1984) displayed that embryonic chick fibroblasts migrate toward negative pole when cultured in small steady electrical field. Early chick embryos, regenerating blastema of amphibians and moth ovaries while transportation of yolk proteins occurs, arc some of the structures where large electric currents have been detected.
Define the Type of chemical reaction used in volumetric analysis? The titration has to be based on some rapid chemical reaction. Although any type of chemical reactions may be
In what ways could human activity lead to the extinction of a species in an area? Human activity could lead to extinction of a species by (a) over-hunting, e.g. elephants, rhin
What proportion of children with Down syndrome do you expect when women with down syndrome have children with men who have 46 chromosomes? Justify answer
Adenine is one of the four nitrogen-containing bases occurring in the nucleotides, the building blocks of organic macromolecule group called as nucleic acids (DNA and RNA). Adenin
Q. What is the clitellum of earthtworms and where it is located? The clitellum is a special region of the annelid constituted by rings (metameres) with reproductive function. I
what are the alpha taxonomy?
Injury to adrenal cortex is not likely to affect the secretion of which one of the following? 1. Aldosterone 2. Both Androstenedione and Dehydroepiandrosterone 3. Adrenali
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Define Cercaria Larva? Cercaria larva is the fourth larval stage in the life-cycle of F, hepatica. It is a free living stage produced by the redia larva. 1. It has
Define beriefly about the Phytoestrogens? You may be aware of the surging interest in phytoestrogens (PE) especially in connection with osteoporosis. This section briefly discu
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