Cell-cycle controls, Biology

• Cancer cells do not respond normally to the body's control mechanism.

o They divide excessively and invade other tissues.
o If left unchecked, they can kill the organism.

• Cancer cells do not exhibit contact inhibition

o If cultured, they continue to grow on top of each other when the total area of the petri dish has been covered
o They may produce required external growth factor (or override factors) themselves or possess abnormal signal transduction sequences which falsely convey growth signals thereby bypassing normal growth checks.

• Cancer cells exhibit irregular growth sequences

o If growth of cancer cells does cease, it does so at random points of the cell cycle
o Cancer cells can go on dividing indefinitely if they are given a continual supply of nutrients
o Normal mammalian cells growing in culture only divide 20-50 times before they stop dividing.

Posted Date: 4/16/2013 6:19:58 AM | Location : United States

Related Discussions:- Cell-cycle controls, Assignment Help, Ask Question on Cell-cycle controls, Get Answer, Expert's Help, Cell-cycle controls Discussions

Write discussion on Cell-cycle controls
Your posts are moderated
Related Questions
topics for zoology assignment for plus one

Q. Evaluate the texture of various foods? A number of instruments are available to evaluate the texture of various foods. Brief discussions on these instruments follow. Cons

Describe Valvar Aortic Stenosis Murmurs ? Characteristic: Harsh, rasping crescendo-decrescendo murmur best heard anywhere in a straight line from right 2nd ICS to apex ("sash"

Interferons are small glycoproteins formed by virus-infected cells that inhibit viral infection. They are heterogeneous. Gamma interferons induce MHC class II antigens in macrophag

please i want detailed explanation on the mechanism of enzyme catalysis

Q. What is the life cycle of the gymnosperms? As all plants they present a diplobiontic life cycle that is alternation of generations with haploid and diploid stages and the la

Define Nutritional Demands of Sports and Dietary Recommendations? There is a strong relationship between nutritional status and physical training. Whether it is to maintain hea

Cyanotic Heart Disease In  this there is a communication between Pulmonary and systemic circulation through which venous blood enters the systemic circulatory system. The infa

Q. What treatment should be used for constrictive pericarditis? Medical Treatment 1) Judicious use of diuretics to alleviate systemic congestion. This may be enough in s