About 1016 cell divisions take place in a human body during a lifetime, yet an adult human body consists of only about 1013 cells. Why are these two numbers so different?
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About 1016 cell divisions take place in a human body during a lifetime, yet an adult human body consists of only about 1013 cells. Why are these two numbers so different?
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- What is a chromosome? How many chromosomes are in humans? 2.- What are the phases of the cell cycle? Why are important? 3.- a: What is the interphase ? b: Please explain the phases of the interphase. 4.- Why the cells are capable to maintain the homeostasis? 5.- Please name the organelles in the cell, and explain Golgi Apparatus, and Nucleolus: __________________.1. Why must somatic cells divide? 2. How do healthy cells decide when to divide? 3. How is information passed to new cells during cell division?A cell containing 48 chromatids at metaphase would, at its completion, produce two nuclei each containing how many chromosomes?
- In humans, what kinds of cells undergo cell division most often? What kinds of cells almost never undergo cell division?A cell with 80 chromosomes undergoes mitosis. How many chromosomes are found in the daughter cells? How many daughter cells are produced? Are the daughter cells identical to one another or different from one another?1) what is meant by “there is no such thing as a typical cell?” 2) which part of the cell cycle does the cell spend the least amount of time in? Why do u think that is? 3) why would a cell ever want to destroy itself? 4) how long does a cell live before it undergoes mitosis? 5) if cells can constantly replace themselves, why is a heart attack (which kills cardiac muscle cells) so devastating? 6) what type of cells never undergo mitosis? 7) what makes stem cells particularly interesting to researchers? 8) how might stem cells be used to repair brain or heart damage, even though these cells do not undergo mitosis? 9) why do you think beauty experts would also be interested in stem cells? 10) what is the connection between cancer and mitosis? 11) why is it so difficult for your body to battle cancer? 12) why does you hair fall out of the chemotherapy?
- Some cells in organisms can divide on a daily basis while others do not divide as often. Which phase of the mitosis do you think would vary the most due to different rates of cell division and why?If a cell with 6 chromosomes undergoes mitosis followed by cytokinesis, how many chromosomes will each daughter cell have?1. Most nerve cells in the adult human central nervous system, as well as heart muscle cells, do not divide. In contrast, cells lining the inside of the small intestine divide frequently.. Discuss this difference in terms of why damage to the nervous system and heart muscle cells (think stroke or heart attack) is so dangerous. What do you think might happen to tissues such as the intestinal lining if a disorder blocked mitotic cell division in all cells of the body?
- If you were to look at a sample of “normal” cells, what phase of the cell cycle do you think most of the cells would be in? If you were to look at a sample of cancer cells, what phase of the cell cycle do you think most of the cells would be in?In the tracking chromosomal DNA movement through mitosis experiment, how many chromosomes did each of your daughter cells contain? Why is it important for each daughter cell to contain information identical to the parent cell? How often do human skin cells divide? Why might that be? Compare this rate to how frequently human neurons divide. What do you notice?Some cells in your body frequently divide, while others in your body rarely, if ever, divide. a. What type of cell frequently divides? b. What type of cell infrequently divides? c. How would the two cells differ in their interphase?