Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Origin of Regeneration Cells of Blastema
The origin of the cells making the blastema in vertebrates has been investigated by various workers in the case of regenerating legs of salamanders and newts. Their studies have depicted that cells which form the blastema are of local rather than of systemic origin. To come to this conclusion they have performed various irradiation experiments on urodeles. It has been observed that appropriate dose of x-rays supress the capability of urodeles to regenerate.
Figure: Histological sections of regenerating newt limbs
By using this knowledge scientist found that those urodeles whose bodies were irradiated failed to regenerate their limbs after amputation. Similarly, irradiated limbs also failed to regenerate upon consequent amputation. Though if the limb was shielded from the x-rays while the rest of the body was irradiated then regeneration proceeded normally in the limb while the limb was amputated. If only a portion of limb for example the knee joint was irradiated, after that regeneration of the limb took place only if the amputation was done above or below the irradiated segment and not through it. Figure displays some of the irradiation experiments performed on the urodeles. These experiments clearly depicted the local origin of the cells of the blastema.
Explain the Types of cell Reproduction ? One of the major characteristics of living organisms is their ability to grow and reproduce. This is accomplished by cell division. In
Q. Briefly explain about Type Specimens ? The specimens on which the names of the species are based are kept as type specimens. Do not replace these specimens because these wi
Amelioration of mineral deficiency Performance of livestock in the tropics is mainly governed by the quality and quantity of nutrients provided in the diet. In most of the dev
Discuss about the Common migraine This is the most frequent type, occurring in more than 80% of migraine sufferers. There is no clear aura as there is in classic migraine, but
Define Food availability and Food Access? Food availability: This refers to availability of necessary types of food in sufficient quantity, to the individual. The sources may b
Define Types of Root Canal Perforations According to location According to location (level) in relation to crestal bone): Coronal perforation: (supragingival) coronal to
Nervous System of Echinoderms Previous to studying the nervous system of echinoderms, you have to bear in mind the peculiar organization of these animals. Here as well, the ne
6
How dissimilar is the simple cuboidal epithelium from the columnar epithelium? Where can these epithelia are found in the human body? The simple cuboidal epithelium is made of
Considering the nature of negative-feedback control and the function of the respiratory system, what effect do you predict that a decrease in CO2 in the internal environment would
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd