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Physiological Regeneration
This type of regeneration is a regular physiological function including the continuous replacements of cells and tissues, and thus is indispensible for the maintenance of life in all animals. It is a primary attribute of all living systems. With no such type of regeneration there would be no life, as the extremely maintenance of an organism depends upon the incessant turnover by which all tissues and organs renew themselves. For instance, regular replacement of epidermal skin layers and RBC etc., in our body is a must. In a few instances quite substantial quantities of tissues are replaced periodically, as in the successive production of follicles in the ovary or the moulting and the replacement of feathers and hairs. In our body one per cent (%) of the total 25*1012 RBCs present in active circulation, die every day and thus are replaced daily. The time span of regeneration varies; as for example, mammalian skin epidermal cells, generated at the basal level may take several weeks to reach the outer surface and be sloughed off, whereas the life span of an individual epithelial cell in the intestine may be limited to a few days. The motile hairlike flagella and cilia of single-celled organisms have the capability to regenerate within an hour or two after amputation.
SOM E COMMON REFLEXES RELATED TO RESPIRATION - 1. Cough Reflex: Due to stimulation in Trachea before it 2.5 lit. air is inhaled. 2. Sneezing Reflex: Stimulati
For measuring the rate of transpiration of a twig using Ganong's potometer, learner A cuts the twig and fits it in the broad end of the water-filled potometer. Learner B cuts the t
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Discuss why Obelia is considered to be of special interest in Zoology as an animal showing an intermediate grade of organization.
list the major species of echinodermata
Q. Describe Lipoprotein? Ans. There is considerable current interest in this lipoprotein, which consists of LDL with an additional apoprotein-apoprotein (a) attached to it
The goals of treating heart failure are relief of symptoms, improvement in exercise tolerance, and reduction in the number of hospitalizations, decreasing morbidity and mortality
an assignment of amphibians
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