• 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
Cell Transport
Cell Transport

... *Because the cell needs isolated areas of the cell with different pH for particular functions; ex) lysosomes – have proton pumps to maintain a pH=5 *Because the cell only uses one ATP to pump a proton out, and that proton can be used in co-transport Co-transport – process cells use to bring large mo ...
Interaction of ZPR1 with translation elongation factor
Interaction of ZPR1 with translation elongation factor

... pMM6 was prepared by inserting two fragments of the cZPR1 gene (2785 bp to 210 bp and 1970 bp to 11,471 bp) flanking the LEU2 gene in the plasmid pRS405 (Sikorski and Hieter, 1989). The ScaI-SpeI fragment from pMM6 containing the disrupted cZPR1 gene was transformed into the diploid yeast strain CY2 ...
Developing optimum smoke control systems for prison cells in
Developing optimum smoke control systems for prison cells in

... The importance of reliable data for modelling input cannot be overemphasised. Certainly in the absence of actual data, assumptions must be made, and such assumptions must necessarily be conservative. The results are correspondingly conservative, and if too much conservatism creeps into an analysis t ...
The cell - Libero.it
The cell - Libero.it

... Your body is made up of about 100 billion living cells. You can tell when they are alive because there are all sorts of chemical changes going on inside them. Every cell is like a tiny ball of jelly full of chemicals and it’s far too small to be seen without a microscope. In fact you can squeeze tho ...
tissues - Linn-Benton Community College
tissues - Linn-Benton Community College

... TISSUE REPAIR 3) Regeneration or fibrosis Surface cells replaced with new cells If injured tissue is unable to regenerate Original cells are replaced by collagen bundles running in ...
PDF
PDF

... developmental mechanisms of diverse taxa and comparing them in light of the relevant phylogenetic relationships. In making such comparisons, the fruit fly Drosophila melanogaster and the nematode Caenorhabditis elegans are prime candidates for reference species, since these are the organisms for whi ...
Chapter 8
Chapter 8

File
File

... into only one type of cell. For instance, a stem cell might become a cardiac muscle cell or a spinal neuron. These committed cells still retain all of the genetic information needed to build an entire organism. However, during determination, they lose their ability to express some of this informatio ...
Chemoreceptors (Ke”mo-re-sep-torz) Overview: Chemoreceptors
Chemoreceptors (Ke”mo-re-sep-torz) Overview: Chemoreceptors

... the discomfort. Perception gives information on the pain's location, intensity, and something about its nature. The various conscious and unconscious responses to both sensation and perception, including the emotional response, add further definition to the overall concept of pain. Pain arises from ...
Comparing Mitochondria and Chloroplasts
Comparing Mitochondria and Chloroplasts

... 2 membranes stroma = internal fluid-filled space  DNA, ribosomes & enzymes  thylakoids = membranous sacs where ATP is ...
Origin of Cancer: An Information, Energy, and Matter Disease
Origin of Cancer: An Information, Energy, and Matter Disease

... develop cancers (Martincorena et al., 2015). This finding stands in contrast to the mutation hypothesis because, if mutations really are the exclusive cause of cancer, then how can the hypothesis explain, on the one hand, the existence of cancers without mutations, and on the other, the fact that no ...
RESPITATION - Barbados SDA Secondary
RESPITATION - Barbados SDA Secondary

... • Both photosynthesis and respiration convert energy into a form that living cells can use: • However generally speaking, cellular respiration is the opposite of photosynthesis. • During photosynthesis, water molecules are first split into hydrogen and oxygen and then the hydrogen atoms are combined ...
Characteristics of Living Things
Characteristics of Living Things

... Characteristics of Living Things ...
A Study of the Effect of Different Growth Medium Concentrations on
A Study of the Effect of Different Growth Medium Concentrations on

... Chondrocyte Cultures. Using RT-PCR, cDNA was created from mRNA purified from chondrocyte cultures, amplified, and run on an agarose gel. The first lane indicates a DNA ladder, the next two lanes contains Collagen I cDNA from the 6 mL and 9mL samples, respectively. Both samples contain bright bands c ...
Correlated Discharge among Cell Pairs within the Oculomotor
Correlated Discharge among Cell Pairs within the Oculomotor

... Synchronous firing between many unilateral pairs of cells could have arisen from population synchrony in which many position neurons fire simultaneously and pairwise events only occur as part of a larger population event. To determine whether this was so, simultaneous recordings with three separate ...
Relation of Interferon Production to the Limited Replication of
Relation of Interferon Production to the Limited Replication of

... BHK-21 cells were treated for 24 h with the appropriate serially diluted culture media of the respective species of cells, infected with NDV and then challenged by 100 TCID50 of VSV. After 3 days the development of cytopathic change was scored and IFN titre was expressed by the reciprocal of the hig ...
Powerpoint examples of tissues
Powerpoint examples of tissues

... composed of several cell layers; basal cells are cuboidal or columnar and metabolically active; surface cells are flattened (squamous); in the keratinized type, the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more superficial layers. Str ...
Role of reactive oxygen species in cell signalling pathways Abstract
Role of reactive oxygen species in cell signalling pathways Abstract

... Reactive oxygen species (ROS) have been of interest for many years in all areas of biology. Originally ROS were recognized as being instrumental for mammalian host defence, and early work led to the characterization of the respiratory burst of neutrophils [1,2] and finally the NADPH oxidase complex ...
cell behaviour during active cell rearrangement: evidence and
cell behaviour during active cell rearrangement: evidence and

... in the marginal zone. Epithelial cell rearrangement in the sea-urchin embryo both elongates the archenteron and simultaneously closes the blastopore. Cell rearrangement is accompanied by stage­ specific changes in protrusive activity and cell shape of the basal surfaces of cells in the wall of the g ...
sample pages - Oxford University Press
sample pages - Oxford University Press

... All cells are bound by a cell membrane. In plant cells, this is enclosed by a rigid cell wall made of cellulose. Membranes are very thin (about 8 nm or 0.000008 mm) and act as a boundary between the cell and its environment (so maintaining the concentrations of substances inside and outside the cell ...
Epithelial Integrin O/6~4: Complete Primary Structure of and Variant
Epithelial Integrin O/6~4: Complete Primary Structure of and Variant

NEURONS COMMUNICATE WITH OTHER CELLS AT SYNAPSES
NEURONS COMMUNICATE WITH OTHER CELLS AT SYNAPSES

... postsynaptic potentials (EPSPs); shift membrane potential towards threshold. • Inhibitory synapses shift membrane potential away from threshold; produce graded ...
Chap 7 ?`s
Chap 7 ?`s

... 7. Which of the following is a characteristic feature of a carrier protein in a plasma membrane? A. It is a peripheral membrane protein. B. It exhibits a specificity for a particular type of molecule. C. It requires the expenditure of cellular energy to function. D. It works against diffusion. E. It ...
6 dent antigen specific B cell response
6 dent antigen specific B cell response

... shaping the BCR repertoire. Point mutations in antibody V regions are induced due to AID activity in B cells, as a result, yield different affinities to the developing clones. (In plasmablasts, Ig V genes undergo point mutations at an extremely high rate, which are about a million times higher than ...
Divergent and convergent evolution in
Divergent and convergent evolution in

... ð5Þ 2sa This function has been scaled so that two epithelial cells (normal or malignant) will have a competition coefficient of a ¼ 1 if they share the same strategy, and this competition term takes on a maximum value when uj ¼ v þ b. The evolving strategy in this model, v, can be thought of as some ...
< 1 ... 394 395 396 397 398 399 400 401 402 ... 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