Concept explainers
SCIENCE, TECHNOLOGY, AND SOCIETY The aging process is thought to be initiated at the cellular level. Among the changes that can occur after a certain number of cell divisions is the loss of a cell's ability to respond to growth factors and other signals. Much research into aging is aimed at understanding such losses, with the ultimate goal of extending the human life Span. Not everyone, however, agrees that this is a desirable goal. If life expectancy were greatly increased, discuss what might be the social and ecological consequences.
Want to see the full answer?
Check out a sample textbook solutionChapter 11 Solutions
CAMPBELL BIOLOGY MOD MASTERING (18 WEEK)
Additional Science Textbook Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Human Biology: Concepts and Current Issues
Concepts of Biology
Laboratory Experiments in Microbiology (11th Edition)
- Cell specializations are usually a modification or elaboration of one of the basic cell functions. (True or fa1se?)arrow_forwardA salamander can regenerate the entire front part of the brain; including sensory structures. Being a salamander enthusiast you use laser capture microdissection to isolate a proliferative group of cells after sectioning off part of the brain of your pet salamander. What are 5 ways that you could determine if these cells are indeed NEURAL stem cells and briefly describe each?arrow_forwardStem cells: What property of stem cells makes them interesting to scientists?arrow_forward
- P ESC (Embryonic Stem Cell) has ability to proliferate and differentiate into various cell types. Determining right and wrongarrow_forwardSTRICTLY NO PLAGIARISM Discuss the importance of Stem Cells. How does the scientists harvest the stem cells in our body? Differentiate the embryonic stem cells and the adult stem cellsarrow_forwardFighting Cancer by Disrupting Mitosis Scientists have identified a number of toxins that disrupt mitosis. These toxins can be used in many different ways – some of them are used during scientific research to arrest the cell cycle at specific points so that the cells can be studied. Others have clinical applications as chemotherapeutic drugs that are useful in the treatment of cancer, as well as other types of disease. Study the list of toxins below, and use the information provided and your understanding of mitosis to answer the questions below. Note: some of these drugs are currently approved for clinical use, while others are still in development. For the purposes of this exercise, assume that all of them are available for use. Drug How it affects mitosis Status of drug Vincristine Prevents polymerization of tubulin Approved Paclitaxel Prevents depolymerization of tubulin and can result in multipolar spindle formation Approved Flavopiridol Blocks Cdk-1. Cdk-1 is a kinase that helps…arrow_forward
- Virtually every multicellular organism, including you, goes from a single-celled fertilized egg to a large, multicellular organism. In this post you will demonstrate an understanding of how the process of mitosis leads to the growth of an organism and how cell differentiation results in the wide variety of specialized cells found in a multicellular organism. How does mitosis explain the process of growth? Can growth occur only through mitosis? If every cell in your body is a copy of that original fertilized egg, how is it that some cells are so different than other cells? How does differentiation help explain these different cell types? Cite some specific examples of differentiated (specialized) cells. Please remember to add a question to engage your classmates in the discussion.arrow_forwardMitosis: Name the Stages of Mitosis These pictures show the order of stages during mitosis. Name each mitotic stage, 1 though 5. Each answer choice is used once and only once. 1. 2. 3. 4. 5. nal [Choose] 2 [Choose] 3. [Choose]arrow_forwardWhy cell injury due to genetic causes are alarmingly increasing each year. Explain at your own wordsarrow_forward
- Which statement about cellular aging is TRUE? Cellular aging is unrelated to the first law of thermodynamics Oxidative stress prevents cellular aging. cellular aging is the result of an intracellular accumulation of damaged proteins Telomere length is maintained indefinitely in all cells, causing cellular aging.arrow_forwardCU: Structure and Function In the 1800s two scientists, Theodor Schwann and Matthias Schleiden, studied different types of organisms. After many years of studying a great variety of organisms, they drew similar but independent conclusions about their observations. Schwann studied animals and concluded that all animals are made of cells. Schleiden studied plants and concluded that all plants are made of cells. What statement was developed most directly from these conclusions and is part of the modern cell theory? Cells contain hereditary information. O Cells exist only in multicellular organisms. The functions of living things occur in cells. Living things are composed of cells. 1 2 3 4 5 6 DELL 441arrow_forwardA researcher is studying the effects of a novel cancer drug on cell division and comparing the new drug to a traditional chemotherapy drug. The traditional drug causes numerous side effects such as nausea, vomiting, hair loss and susceptibility to infections due to low white blood cell counts. The novel drug is a targeted therapy (specifically targets the abnormal protein in the cancer cell) and is likely to reduce side effects that patients experience when treated with traditional chemotherapy. One group of cancer patients was treated with the novel drug and a second group of cancer patients was treated with the traditional chemotherapy drug. Prior and subsequent to treatment, a mitotic index was obtained from a tumor sample from each patient as well as a bone marrow sample (bone marrow cells give rise to all blood cell types including red blood cells and white blood cells). Since this is a double-blind study (neither the patient nor the researcher knows which patients received which…arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning