Henrietta Lacks died in 1951, but her cancer cells are still alive today. Do you think they carry some essence of Henrietta? How do you think you would perceive cells from someone close to you that grow in culture in a laboratory...or is the idea of cells simply too remote to relate to?
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- Lina, a teenager, observed one morning as she looked at the mirror that her face has a new pimple. She wondered how she got another pimple when she already pricked it a few days ago. What principle of the cell theory is related to this? Provide a brief explanation as to its relationship with the principle of cell theoryinvolved. ThanksThrough a microscope, you can see a cell platebeginning to develop across the middle of a celland nuclei forming on either side of the cell plate.This cell is most likely(A) an animal cell in the process of cytokinesis.(B) a plant cell in the process of cytokinesis.(C) a bacterial cell dividing.(D) a plant cell in metaphase.Comment on the following (1922) quote fromWarren Lewis, who was one of the pioneers of cell biology.“Were the various types of cells to lose their stickiness forone another and for the supporting extracellular matrix,our bodies would at once disintegrate and flow off into theground in a mixed stream of cells.
- Cancer cells can eventually metastasize (or spread) from their tissue of organ to distant sites throughout the body. Which of the three types of cytoskeletal components could be used to detect the tissue of organ of a metastatic cancer cell? Why? (For example, if you took a biopsy of a tumor that had spread to the lungs, how could use what you know about the cytoskeleton to determine where the cancer originated? )How does a cell maintain theright amount of every component(organelles, molecules), and how doesit change these amounts as needed(for example, to greatly expand theendoplasmic reticulum when the cellneeds to produce large amounts ofsecreted proteins)?Tissue in which cells have lost the capacity of cell division: A) Mesristmatic tissue B) Permanent tissue C) Both a and b D) None of these
- A major tenet of the cell theory is that allbodily structure and function are based oncells. The structural properties of bone, cartilage, and tendons, however, are due moreto their extracellular material than to theircells. Is this an exception to the cell theory?Why or why not?A cell collected from the stratum germinativum layer of the skin during adulthood might best be considered a(n) -- stem cell. Unipotent Totipotent Multipotent PluripotentThe cell theory is not applied for...........
- A cell is like our school. Each part of the cell (and school) has responsibilities thatmust be done and certain organelles (people or places) do them. Identify the function of the following parts of the cell. Then, identify which person does the same job (or a place like it) in the school. The first one is done for you as an example to follow. (Picture attached below).All cells have a single primary cilium. This cilium is not (a) _____ and is thought to (b) _______ cell signalling pathways. It must be (c)_______ before mitosis can occur.Which of the following is an illustration of cell sorting? When dissociated epidermal and neural cells are mixed together, they will transdifferentiate and adopt a different fate A than their embryonic fate. When dissociated epidermal and neural cells are mixed together, they reaggregate and then segregate into two layers: B an epidermal layer and a neural layer. When dissociated epidermal and neural cells are mixed together, they can influence each other's development through paracrine signaling. Dissociated presumptive epidermal cells can spontaneously reaggregate after the dissociating agent has been removed. E When presumptive epidermal cells are isolated from the embryos, they dissociate spontaneously.