• 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
Gutsy moves in mice: cellular and molecular dynamics of endoderm
Gutsy moves in mice: cellular and molecular dynamics of endoderm

... The concept that DE emerges at the distal tip of the conceptus resulted from fate-mapping studies that showed that DE precursors reside near the APS [17 –19]. The primitive streak is a dynamic structure: it starts out as a small region of cellular ingression in the most posterior part of the epiblas ...
Human Corneal Endothelial Cells Expanded In Vitro Are a Powerful
Human Corneal Endothelial Cells Expanded In Vitro Are a Powerful

... epithelium, Bowman’s layer, the stroma, Descemet’s membrane, and the endothelium. The epithelium is a well-characterized self-renewing layer with stem cells at its peripheral areas. The stroma cells are usually a group of small quiescent cells, which play an important role in maintenance of corneal ...
Viscoelastic dissipation stabilizes cell shape changes
Viscoelastic dissipation stabilizes cell shape changes

Two vacuole-mediated defense strategies in plants
Two vacuole-mediated defense strategies in plants

... by rapid and localized programmed cell death (PCD) known as hypersensitive cell death. The HR is controlled by multiple signal transduction pathways that are initiated upon recognition of a pathogen avirulence (Avr) factor by a plant resistance (R) gene product.2 Although the components of the signa ...
Chapter 4
Chapter 4

... Microscopes as Windows on the World of Cells – Light microscopes can be used to explore the structures and functions of cells. – When scientists examine a specimen on a microscope slide • Light passes through the specimen • Lenses enlarge, or magnify, the image – Magnification is an increase in the ...
High-throughput screens for fluorescent dye discovery
High-throughput screens for fluorescent dye discovery

FREE Sample Here
FREE Sample Here

... full file at http://testbankcorner.eu 46) Amoebae move by crawling over a surface (cell crawling), which involves _____. A) growth of actin filaments to form bulges in the plasma membrane B) setting up microtubule extensions that vesicles can follow in the movement of cytoplasm C) reinforcing the p ...
7.2 Cell Structure
7.2 Cell Structure

... In many cells, the smooth ER contains collections of enzymes that perform specialized tasks, including the synthesis of membrane lipids and the detoxification of drugs. ...
Stomata lab data sheet
Stomata lab data sheet

... Lab Experiment for Section 5.2 Purpose: In this activity, you will be investigating the structure of the stomata within a spinach plant leaf and determine how it functions with regards to the process of photosynthesis. Objectives:  Students will be able to define the function of the stomata  Stude ...
Applied and Environmental Microbiology
Applied and Environmental Microbiology

... ber of adsorbed cells per root hair was signifi- four additional replicates of R. trifolii strain cantly less thaxi the pooled means of infective 403 adsorbed on white clover root hairs were R. trifolii cells at the 99.5% level. Thus, it can 24.25 ± 1.60 25.10 - 2.18, 24.90 ± 1.79, and be concluded ...
Biotic and abiotic elicitors induce biosynthesis and accumulation of
Biotic and abiotic elicitors induce biosynthesis and accumulation of

... Man-ABA20 Man-Fungi medium ...
Ch. 3  - SBCC Biological Sciences Department
Ch. 3 - SBCC Biological Sciences Department

... neurons do not divide, they cannot be grown long enough in laboratory culture to observe what goes wrong in ALS. A new technology called cellular reprogramming, however, can take a specialized cell type back to a stage at which it can specialize in any of several ways. Then, by adding certain chemic ...
Regulation of Vascular Development - Size
Regulation of Vascular Development - Size

... hypothesis predicts that cells would be added incrementally to the end of developing procambial strands, but these observations suggest that this step happens at a prepatterning stage and that morphological appearance of procambium is expressed only after the bridge from auxin source to sink is comp ...
Ch. 36
Ch. 36

... AP Biology Chapter 36 – ...
Nerve activates contraction
Nerve activates contraction

...  Tissues are groups of cells that are similar in structure and function ...
- Haverford Scholarship
- Haverford Scholarship

... Immunofluorescence. KKF cells (5 x 105) were distributed in a microtiter plate and incubated for 30 min at 4~ with 100 #1 of undiluted hybridoma culture supernatant (in the case of MR 12-4 and MR 10-2) or 30/~1 staining medium (PBS, 0.5% BSA, 0.05% NAN3) with saturating concentrations of 2Cll, H57-5 ...
Glucocorticoid-Induced Plasma Membrane Depolarization during
Glucocorticoid-Induced Plasma Membrane Depolarization during

... caspase activation, and DNA degradation (3–5). The structure and function of the plasma membrane are also altered by glucocorticoids during apoptosis, as is evidenced by alterations in the transport of glucose and amino acids (6) and the distribution of ions across the membrane (7–10). Phosphatidyls ...
The innate immune function of airway epithelial cells in inflammatory
The innate immune function of airway epithelial cells in inflammatory

... intense communication network involves not only soluble mediators but also cell–cell contacts, and allows AECs to transfer a signal resulting from exposure to inhaled substances to other cells, and thus instruct adaptive immunity. In recent years, significant progress has been made in our understand ...
Transcriptional insights into the CD8+ T cell response to infection
Transcriptional insights into the CD8+ T cell response to infection

... select few with the ability to form long-term memory and to protect the host from reinfection. Each differentiation state—naive, effector, terminally differentiated effector and memory—is thought to be orchestrated by a network of transcription factors with key downstream targets that enable and enf ...
Cytoskeleton-Plasma Membrane-Cell Wall
Cytoskeleton-Plasma Membrane-Cell Wall

... Institute of Botany, Department of Plant Cell Biology, Rheinische Friedrich-Wilhelms University of Bonn, 53115 Bonn, Germany (F.B., J.Š., P.W., D.V., D.M.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Akademicka 2, SK–949 01 Nitra, Slovak Republic (J.Š.); Institute o ...
Origin of Life
Origin of Life

... Organization of cells • Cells are simply replicating stuff inside a membrane – so the membrane makes it a cell. • Cell membrane made of fatty acids (lipids) – In water, they self-organize into bilayer membranes One end of the fatty acids is attracted to water: the other end is repelled by water. So ...
ACELL Mar. 45/3 - AJP-Cell
ACELL Mar. 45/3 - AJP-Cell

... large intestines, is a main organ for water entrance to the body. A large volume of water moves and is absorbed in the gastrointestinal tract every day, estimated as 7.5 liters in the small intestine and 1.5 liters in the large intestine in humans (25, 27). Although electrolytes have been demonstrat ...
ELI1 regulates cell expansion and secondary wall
ELI1 regulates cell expansion and secondary wall

... of phloroglucinol staining in the primary root. mux (multiple xylem) mutants exhibited an increased number of xylem strands in the primary root, tpx mutants displayed an altered timing of protoxylem development in the primary root, and eli (ectopic lignification) mutants exhibited an altered pattern ...
Cell Death and Differentiation
Cell Death and Differentiation

... proteins were analyzed by Western blotting with an anti-GST antibody (left panel). The CaM::HRP overlay assay (described in Materials and Methods) was performed in the absence (5 mM EGTA, middle panel) or presence (1 mM CaCl2, right panel) of Ca2 þ . CDDI575V, CDDI575S and CDDI575N represent replace ...
How and why cells grow as rods Open Access Fred Chang
How and why cells grow as rods Open Access Fred Chang

... (glycan strands) oriented along the circumferential direction [12]. It will be interesting to discover whether there is mechanical anisotropy in plant cell walls, or whether they are more like the fission yeast cell wall. It is important to note that the anisotropy of growth (elongation along only o ...
< 1 ... 275 276 277 278 279 280 281 282 283 ... 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