• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
03 Movement in and out of cells
03 Movement in and out of cells

... e.g. Active transport and muscle contraction ATP is produced by respiration – by breaking down glucose ...
The Basic Unit of Life
The Basic Unit of Life

... with the end of a toothpick. You will not be able to see anything on the toothpick when you remove it from your mouth (Figure 2-B). Dip the toothpick into the stain on the slide and mix once or twice (Figure2-C). Add a coverslip and examine under low and high power of your microscope. (use the hair ...
Cell Wall
Cell Wall

... •they are often associated with forming rough ER •Ribosomes are the site of protein synthesis in cells •they are made by the nucleolus of the cell •A ribosome can make the average protein in about one minute ...
Transcriptional regulatory network underlying connective tissue
Transcriptional regulatory network underlying connective tissue

... mesenchymal explant cultures overexpressing each of the transcription factors. Wholetranscriptome sequencing revealed that the transcription factors share common regulatory functions and positively regulate biological processes related to signal transduction, cell communication and biological adhesi ...
Section 2: Energy Flow in Ecosystems
Section 2: Energy Flow in Ecosystems

... Mitosis Checkpoint • During the metaphase stage of mitosis, chromosomes line up at the equator. At this point, the cell checks that the chromosomes are properly attached to the spindle fibers. • Without this point, the sister chromatids of one or more chromosomes may not separate properly. ...
lect 4
lect 4

... cells have neither a membrane-bounded nucleus nor other membrane-bounded organelles. These organisms are very successful. Did you know all bacteria found on the surface of our planet weigh more than any other species? That's amazing. ...
SOL5.4-5.5Cells
SOL5.4-5.5Cells

... substance dissolves in another. a. solution b. compound c. juice 14. Sugar dissolved in water is a: a. solution b. mixture c. both 15. Which of the following is a compound? a. sodium b. oxygen c. carbon dioxide d. hydrogen ...
Pharmacologic ascorbic acid concentrations selectively kill cancer
Pharmacologic ascorbic acid concentrations selectively kill cancer

... exposures. Normal cells were unaffected by 20 mM ascorbate, whereas 5 cancer lines had EC 50 values of <4 mM, a concentration easily achievable i.v. Human lymphoma cells were studied in detail because of their sensitivity to ascorbate (EC 50 of 0.5 mM) and suitability for addressing mechanisms. Extr ...
120 - volvox worksheet
120 - volvox worksheet

... Volvox are one-celled algae that live together in a colony. The colony is a hollow ball with 500 to 20,000 individual cells. Each of the cells in Volvox also has a flagella. Flagella are beat by individual cells in synchrony with other cells. This allows the whole Volvox to move through the water in ...
shh
shh

... Zebrafish Floor Plate Description ...
Biology - Introductory Remarks
Biology - Introductory Remarks

... – Interdependence with other organisms – Blueprint of life is coded by nucleic acid – Growth and development ...
Dear Managing Editor,
Dear Managing Editor,

... its expression. Moreover, we showed a positive correlation between PAK1 and RIPX expression in gastric cancer samples. Strikingly, we found that high expression of RIPX is tightly correlated to clinical gastric cancer. These findings revealed a novel function of RIPX in gastric cancer, suggesting th ...
Pathogenesis of Liver Fibrosis(Smart 2011)
Pathogenesis of Liver Fibrosis(Smart 2011)

... endoplasmic reticulum, diminution of vitamin A droplets, a ruffled nuclear membrane, appearance of contractile filaments, and proliferation. ...
A Ch2 Notes 97-03  - Little Silver Public Schools
A Ch2 Notes 97-03 - Little Silver Public Schools

... It keeps outside water out and the cell’s water in. ...
cytoskeleton
cytoskeleton

... • Both can move unicellular and small multicellular organisms by propelling water past the organism. • If these structures are anchored in a large structure, they move fluid over a surface. ...
Unit Review Powerpoint
Unit Review Powerpoint

... • every 3 bases has 64 possible combinations • 3 billion base pairs per cell ...
Chapter 5 Tissue Notes File
Chapter 5 Tissue Notes File

... **Stratified Cuboidal Epithelium – two or three layers of cuboidal cells surrounding a lumen; ...
Wetland Plant Adaptations
Wetland Plant Adaptations

... to tolerate stresses or to avoid them. There are several adaptations by hydrophytes that allow them to tolerate anoxia in wetland soils. These adaptations can be grouped into two main categories 1) Morphological 2) Physiological ...
cell cycle1
cell cycle1

... B. A mistake in the cell cycle may lead to cancer 1. Cancer can be the result of a change to one or more genes that code for enzyme(s) that are involved in controlling the cell cycle. When the cycle of cell division is not controlled, cells divide more rapidly. Cancer cells are rapidly dividing cel ...
Tour of the Cell
Tour of the Cell

... Tour of the Cell Part 2 ...
Skills Worksheet
Skills Worksheet

... An analogy is a relationship between two pairs of terms or phrases written as a : b :: c : d. The symbol : is read as “is to,” and the symbol :: is read as “as.” In the space provided, write the letter of the pair of terms that best completes the analogy shown. ...
Cell Transport Power point
Cell Transport Power point

... Proteins • 1. Enzyme activity – to help carry out some of the cell’s chemical rxn. 2. Cell-to-cell recognition: (Transplant issues, blood group, etc. – Ex.) 3. Cell signaling: chem. signals from 1 cell may be picked up by proteins in another cell • for action 4. Transport of Materials: Serve as chan ...
Name
Name

... 14. Isotonic means _____________________________ Hypertonic means ___________________________ Hypotonic means ____________________________ 15. Because cells are hypertonic in relation to fresh water (the water would be considered hypotonic), water will move ___________ of the cell. If that happens, ...
Slide 1
Slide 1

... Principal Investigator, Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR) Abstract : Dendritic cells (DCs) are heterogeneous immune cells crucial for both defense against pathogens and tolerance. DC populations in mouse and human non-lymphoid tissues can be se ...
The Spatial Order of Transcription in Mammalian Cells ARTICLES
The Spatial Order of Transcription in Mammalian Cells ARTICLES

... segmented (blue outlines) and the geometric centroids were calculated (black dots). Cells with nuclei that were not completely in the imaged field were rejected and are not shown. The nuclei of cells expressing three hypothetical gene expression profiles are marked in green, blue, and red. Empirical ...
< 1 ... 645 646 647 648 649 650 651 652 653 ... 1231 >

Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report