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Lecture four
Lecture four

... • usually smaller and less complex than eukaryotic cells • first cells to evolve • single-celled organisms – 0.5 to 5um in diameter (eukaryotes 10-100um) – some species exist as aggregates called colonies • e.g. cyanobacteria ...
Cell wall - De Anza College
Cell wall - De Anza College

... describe small organisms seen through a microscope, which he called animalcules and beasties  Hooke was the first to sketch and name ...
Plant Cell
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... I observed __________. I was doing this to see ___________. I also used the ipad to find out ___________. What I observed was _____________________ (2-3 sentences). Through these activities, I learned that the reason plant and animal cells are different is ______________. This shows me that ________ ...
Team Publications
Team Publications

... degradation of the extracellular matrix, initiated by the formation of invadopodia, actindriven membrane protrusions with matrix-degradative activity. Yet, mechanisms underlying invadopodia formation remain largely unknown. In this report, we examined the role of the histone deacetylase HDAC6 in inv ...
Document
Document

... • usually smaller and less complex than eukaryotic cells • first cells to evolve • single-celled organisms – 0.5 to 5um in diameter (eukaryotes 10-100um) – some species exist as aggregates called colonies • e.g. cyanobacteria ...
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Year 11 Worksheet Cells - VCE

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Osmosis-diffusion-Active_Transport PPT

... which a cell surrounds and takes in material from its environment. The material is engulfed and enclosed by a portion of the cell’s plasma membrane. ...
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... hemoglobin with which they are jam-packed. New RBCs are made in the marrow in the mature human. In the marrow, there is a population of erythropoietic stem cells. These are the precursors to RBCs, and they do have nuclei (which get expelled before they leave the marrow) and the ability to respond to ...
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Ch. 7 Notes: Cell Biology
Ch. 7 Notes: Cell Biology

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Cellular differentiation



In developmental biology, cellular differentiation isa cell changes from one cell type to another. Most commonly this is a less specialized type becoming a more specialized type, such as during cell growth. Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types. Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and during normal cell turnover. Some differentiation occurs in response to antigen exposure. Differentiation dramatically changes a cell's size, shape, membrane potential, metabolic activity, and responsiveness to signals. These changes are largely due to highly controlled modifications in gene expression and are the study of epigenetics. With a few exceptions, cellular differentiation almost never involves a change in the DNA sequence itself. Thus, different cells can have very different physical characteristics despite having the same genome.A cell that can differentiate into all cell types of the adult organism is known as pluripotent. Such cells are called embryonic stem cells in animals and meristematic cells in higher plants. A cell that can differentiate into all cell types, including the placental tissue, is known as totipotent. In mammals, only the zygote and subsequent blastomeres are totipotent, while in plants many differentiated cells can become totipotent with simple laboratory techniques. In cytopathology, the level of cellular differentiation is used as a measure of cancer progression. ""Grade"" is a marker of how differentiated a cell in a tumor is.
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