Explanation:
cancer cells continue to grow they fail to listen to the signal that tells them to stop
cancer cells do not stick to nearby cells like normal cells they lack stickiness caused by adhesion molecules, can break free ans float to other regions of the body
cancer cells are immortal normal cells have a lifespan cancer cells defy death on the end of the chromosomes is a structure known as telomere. everytime a cell divieds it becomes shorter to a point where the cell dies cancer cells figures out a way to restore their telomeres so they dont shorten as the cells divide and they become immortal
Answer:
Non Voluntary action...........
My mathematics is very bad and I always spend time on it but I can not do it anyway. I have a great test in 28 days after I have a favor. Help!
Question is incomplete, the complete question is as follows :
Clotting begins when a _________ occurs in a blood vessel wall. Almost immediately, _______ cling to the blood vessel wall and release _____________ which helps to decrease blood loss by constricting the vessel. __________ is also released by damaged cells in the area. This chemical substance causes ________to be converted to ____________. Once present, thrombin acts as an enzyme to atatch ___________molecules together to form long, threadlike strands of _________, which then traps ____________ flowing by in the blood.
Answer:
Clotting begins when a <u>BREAK</u> occurs in a blood vessel wall. Almost immediately, <u>PLATELETS</u> cling to the blood vessel wall and release <u>SEROTONIN</u>, which helps to decrease blood loss by constricting the vessel. <u>THROMBOPLASTIN</u> is also released by damaged cells in the area. This chemical substance causes <u>PROTHROMBIN</u> to be converted to <u>THROMBIN</u>. Once present, thrombin acts as an enzyme to attach <u>FIBRINOGEN</u> molecules together to form long, threadlike strands of <u>FIBRIN</u>, which then traps<u> ERYTHROCYTES </u>flowing by in the blood.
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Answer:
We use models in order to represent Earth's processes on a smaller scale so that it is easier to study them. ... Changes in any part of the Earth's system affects all other spheres.
