Basically, a cell's life is a product of preparation, rules and regulation, and sometimes even sex, which is made possible by a special type of cell division called meiosis, where cells are created with half the complete set of chromosomes. Yeah, we know this particular circle of life is small and easy for us to ignore on a daily basis (mostly because there are way fewer singing animals), but the microscopic pathways inside of us are the secret of life. Occasionally things do go wrong, but on the whole our cells manage all the hard stuff without us ever having to give it a second thought. While it may be true that we've all got bigger things to deal with, don't forget to take a second, or at least a week when you are studying the cell cycle for your biology exam, to pay the cells in our bodies some respect for all that hard work they do whilst we are not paying attention. After all, it is because of them that we can take a hakuna matata, problem-free, philosophy to life.
Cells come from pre-exsisting cells and cannot be created from non-living material. For example, new cells arise from cell division and a zygote (the very first cell formed when an organism is produced) arises from the fusion of an egg cell and a sperm cell.
When a patient has cancer and is given high doses of chemotherapy, the chemotherapy kills the cancer cells but also the normal cells in the bone marrow. This means that the patient cannot produce blood cells. So before the patient is treated with chemotherapy, he or she can undergo a bone marrow harvest in which stem cells are removed from the bone marrow by using a needle which is inserted into the pelvis (hip bone). Alternatively, if stem cells cannot be used from the patient then they can be harvested from a matching donor. After the chemotherapy treatment the patient will have a bone marrow transplant in which the stem cells are transplanted back into the patient through a drip, usually via a vein in the chest or the arm. These transplanted stem cells will then find their way back to the bone marrow and start to produce healthy blood cells in the patient. Therefore the therapeutic use of stem cells in bone marrow transplants is very important as it allows some patients with cancer to undergo high chemotherapy treatment. Without this therapeutic use of stem cells, patients would only be able to take low doses of chemotherapy which could lower their chances of curing the disease.
Bone marrow transplants are one of the many therapeutic uses of stem cells. Stem cells found in the bone marrow give rise to the red blood cells, white blood cells and platelets in the body. These stem cells can be used in bone marrow transplants to treat people who have certain types of cancer.
Adults have stems cells in the tissues in their bodies that need to be frequently replaced such as the skin. Stem cells have the ability to produce a wide range of cells which means that they are pluripotent. They retain their ability to divide and produce many different cells by cell division and the process of differentiation. For example, one type of stem cells in the bone marrow produce a variety of red and white blood cells.
As a society, we have become so focused on how much we can do at one time that we are willing to risk our personal safety as well as the safety of others because we can’t put down our cell phones....
Aging (production of toxic oxygen "free radicals"), exposure to toxins (like components of tobacco tar), mutagens (like ultraviolet light) all cause mutations in genes and cancer; but normal errors in DNA replication can lead transformation of the cell if they occur in a crucial gene. Stopping cancer cell growth:
Gale Encyclopedia of Medicine states, “ Most lung cancers develop in the cells that line the bronchi.” Lung cancer can take many years to develop and some have no idea that they even have it until it grows large enough to impede the function of the lungs.
Every cell in a multicellular organisms contains all the genes of that organism. However, the genes that are activated vary from cell to cell. The reason we have different types of cells in our body (the cells in your eyes are not the same as the ones that make up your hair) is because different genes are activated in different cells. For example, the gene that produces keratin will be active in hair and nail cells. Keratin is the protein which makes up hair and nails. Genes encode for proteins and the proteins affect the cell’s structure and function so that the cell can specialize. This means cells develop in different ways. This is called differentiation. Differentiation depends on gene expression which is regulated mostly during transcription. It is an advantage for multicellular organisms as cells can differentiate to be more efficient unlike unicellular organisms who have to carry out all of the functions within that one cell.
Financial aid for families faced with catastrophic illness recognizes the devastating financial impact that cancer treatment costs and other medical bills have on college funds. American Cancer Society Youth Scholarship Award Program provides financial aid for deserving cancer survivors and patients facing college funding shortfalls. Awards are issued directly to participating institutions to offset tuition and other campus expenses at universities and technical colleges. Assistance is disbursed by the organization’s regional divisions, like a aimed at resident students in Iowa, Minnesota, South Dakota and Wisconsin. To qualify, each applicant meets these criteria:
Many people don’t realize that not only distracted driving makes cell phones dangerous but with just modern day use can cause health problems and put people at risk with pedophiles....
Experts in the field of stem cell research promise that this will be the future of medicine; that stem cells will be the cure to all the debilitating diseases and afflictions of today, such as Alzheimer’s disease, heart disease, cancer and nerve damage.
As we can see the cube with the largest surface area and volume has the smallest surface area to volume ratio. If the surface area to volume ratio gets too small then substances won’t be able to enter the cell fast enough to fuel the reactions and wast products will start to accumulate within the cell as they will be produced faster than they can be excreted. In addition, cells will not be able to lose heat fast enough and so may overheat. Therefor the surface area to volume ratio is very important for a cell.