• 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

... The plasma membrane had both passive and active transport. Mrs. Degl ...
Vrije Universiteit Brussel IOF Knowledge Center
Vrije Universiteit Brussel IOF Knowledge Center

... Diabetes is a serious chronic disease with major health risks and heavy burden on patients and society, despite current treatment. Its most serious form is caused by a massive loss of insulinproducing beta cells in the pancreas. A cure requires restoration of an adequate beta cell mass through beta ...
Unit 4 Cell Transport Notes Packet - Dallastown Area School District
Unit 4 Cell Transport Notes Packet - Dallastown Area School District

... Processes that Transport Materials across the Cell Membrane (to allow materials either into or out of a cell) *Two categories of Processes = _______________ process VS ________________ Processes* ...
Biology Passage 2 - HCC Learning Web
Biology Passage 2 - HCC Learning Web

... B. Diffusion and Osmosis Osmosis is a more biologically relevant concept than diffusion. Cell plasma membranes are very particular to the flux of ions through transmembrane proteins, whereas water freely diffuses through the lipid bilayer. Thus, a solution (solvent) can ...
Chapter 7 practice quiz
Chapter 7 practice quiz

... permeable to water and to the simple sugars glucose and fructose but completely impermeable to the disaccharide ...
20080826_01
20080826_01

... After MMPs’ importance in cancer progression and metastasis was discovered, people began to search for the source of MMPs and the factors regulating MMPs’ expression. Early in the 1980’s, it was recognized that in most tumors, these MMPs were abundantly and sometimes exclusively expressed not by tum ...
Smooth Muscle Tissue
Smooth Muscle Tissue

... Mitochondrion Nucleus ...
Chapter 29
Chapter 29

... Pre-embryonic Stage - First 2 Weeks  Cleavage - mitotic divisions that occur for 3 days after fertilization  within 30 hrs – 2 cell stage  zygote splits into 2 daughter cells (blastomeres)  within 72 hrs – morula stage (solid ball of cells) ...
10-1 Cell Growth
10-1 Cell Growth

... In multicellular organisms, cell division leads to growth. It also enables an organism to repair and maintain its body. – In single-celled organisms, cell division is a form of reproduction. – Asexual reproduction is reproduction that involves a single parent producing an offspring. The offspring pr ...
Scientific Method
Scientific Method

... Semipermeable ...
Definition
Definition

... Definition ...
Unit 2
Unit 2

... The prokaryotic cell has no nucleus, there is no membrane to separate the DNA from the rest of the cell. The eukariotic cell has its nucleus which is enclosed in the nucleus envelope. The entire region between the nucleus and the cell is the cytoplasm. 4. Describe the structure and function of the n ...
Warm Up
Warm Up

...  Passive  Diffusion  Osmosis ...
Lecture #12 Date
Lecture #12 Date

... • 3) The basal body consists of a rod and a series of rings that anchor the flagellum to the cell wall and the cytoplasmic membrane. Unlike eukaryotic flagella, the bacterial flagellum has no internal fibrils and does not flex. Instead, the basal body acts as a molecular motor, enabling the flagellu ...
Impedance Measurements on Fuel Cells and Fuel Cell Stacks at
Impedance Measurements on Fuel Cells and Fuel Cell Stacks at

... load, makes it possible to study the influence of the different fuel cell elements on the behaviour and (if present) the degradation of the fuel cell. However, most fuel cells operate at currents far higher than 1 A, while most potentiostat/FRA combinations are limited to 1 or 2 A. The maximum curre ...
cell
cell

... The nonmembranous organelles include: • Microtubules, which together with actin and intermediate filaments form elements of the cytoskeleton and continuously elongate (by adding tubulin dimers) and shorten (by removing tubulin dimers), a property referred to as dynamic instability; • Filaments, wh ...
Movement Through the Cell Membrane
Movement Through the Cell Membrane

... Iso=equal solution dissolved substances are the same in the solution as the amount in the cell  The movement of water into the cell equals the water out of the cell ...
Unit 2
Unit 2

... Osmosis is the diffusion of water across a selectively permeable membrane. Water diffuses down its concentration gradient. Example: If two solutions of different concentrations are separated by a selectively permeable membrane that is permeable to water but not to solute, water will diffuse from the ...
Atypical Bacteria
Atypical Bacteria

... –  More than half of our _____________ are produced by species of Streptomyces.! –  Antibiotics are substances
 produced by microbes
 that in small amounts
 ...
TDS - eBioscience
TDS - eBioscience

... pre-dendritic cells. Studies indicate that CD209a expression can vary according to the activation state of the host. Moreover, CD209a is down-regulated in spleen-derived dendritic cell cultures supplemented with GM-CSF. CD209a is involved in mediating the innate immune response by binding microbial ...
Classification Lecture
Classification Lecture

... is misleading. Descriptions are too long to be a name. ex: Mountain Lion or Puma or Cougar ex: Starfish, dragonfly ex:“Oak with deeply divided leaves that have no hairs on their undersides and no teeth around their edges.” ...
Morphological Basis for the Cytolytic Effect of
Morphological Basis for the Cytolytic Effect of

... and releasein megakaryocytes(2), whereassurfaceblebbing of cultured cells, especially seen at anaphase, does not involve formation and alignment of small vacuoles or result in generation and release of small cytoplasmic vesicles. Surface blebbing induced in interphase cells (but not in@ mitotic cell ...
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 ...
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. ...
< 1 ... 644 645 646 647 648 649 650 651 652 ... 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