• 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
Chapter 4 2015 - Franklin College
Chapter 4 2015 - Franklin College

... • Eat a chameleon-blend in with your environment • Eat an algae-photosynthesize ...
2.1 Cell Theory
2.1 Cell Theory

... EXCEPTIONS THAT TEST THE RULE OF CELL THEORY: ...
Week 8 - Tipp City Schools
Week 8 - Tipp City Schools

... O - TSW Describe the structure and function of the cell nucleus. Describe the role of vacuoles, lysosomes, and the cytoskeleton. Identify the role of ribosomes, endoplasmic reticulum, and golgi apparatus in making proteins. L- 7.2: cell structure A- Notes; Video: Eukaryopolis - The City of Animal Ce ...
Ch12mitosis - Environmental
Ch12mitosis - Environmental

...  unicellular organisms  growth  repair & renew ...
Biology is the only subject in which multiplication is the
Biology is the only subject in which multiplication is the

...  unicellular organisms  growth  repair & renew ...
Ch7-2CellStructure - Saint Joseph High School
Ch7-2CellStructure - Saint Joseph High School

... • Plants’ cell membranes are surrounded by cell walls • Plant cell walls are made of proteins and carbohydrates, including cellulose • Helps support and protect the cells • Connects cells to one another ...
Cell Organelle and Levels of Organization STUDY GUIDE
Cell Organelle and Levels of Organization STUDY GUIDE

... Miss Ward ~ Fall 2014  ...
Week 11
Week 11

... Objective: Students will gain an understanding of the cellular structure common to all eukaryotic cells and how these structures work together to allow the all of the cellular reactions to occur. Activity: Five minute review Activity: Complete lecture on the Activity: Complete part A, B and C of the ...
PowerPoint- Eukaryotic Cells
PowerPoint- Eukaryotic Cells

... I am a clear, thick, jelly-like substance. I am found between the cell membrane and the nucleus. ...
Slide 1
Slide 1

... Lysosomes contain special proteins called enzymes which help them digest food by breaking it down into its building blocks. Food particles brought into the cell (through the cell membrane) from extracellular fluid may be digested this way. Potentially harmful microorganisms, such as bacteria and vir ...
B Cell Tolerance
B Cell Tolerance

... have similar properties • Both have a similar surface phenotype (CD93+ CD23+ IgMlo, CD24inter, IgDhi) and lifespan. • Non-autoreactive BCR transgenic mice have few T3 cells suggesting that this population may not represent a developmental stage between T2 and naïve B cells. • Maintenance of the T3 p ...
What Are the Major Chemical Elements Found in
What Are the Major Chemical Elements Found in

... living cells. However, living things would not be able to survive without trace elements. Trace elements include iron, iodine, manganese, molybdenum, selenium, silicon, tin, vanadium, boron, chromium, cobalt, copper and fluorine. Iron is found in red blood cells and helps to carry oxygen in the bloo ...
Cell City Analogy – Let`s Practice Writing Analogies!
Cell City Analogy – Let`s Practice Writing Analogies!

... Cell City Analogy – Let’s Practice Writing Analogies! In a faraway city called Greensburg, the main export and production product is the steel widget. Everyone in the town has something to do with steel widget making and the entire town is designed to build and export widgets. The town hall has the ...
BSCI 124: LECTURE 2
BSCI 124: LECTURE 2

... • Each cell is functionally independent – it can live on its own under the right conditions – Uses sugars to get energy and stay alive – Contains all necessary info to replicate  produce a multicellular organism – Can make a whole plant  from a single cell! ...
3.5 Reinforcement
3.5 Reinforcement

... molecule called ATP. A cell may use this energy directly or indirectly. • The sodium-potassium pump directly uses energy from the breakdown of ATP to pump two potassium ions into a cell for every three sodium ions it removes from the cell. • The proton pump indirectly uses energy from the breakdown ...
Cells and Reproduction
Cells and Reproduction

... Our blood contains several different types of cells, red blood cells, white blood cells and platelets. The red blood cell’s job is to collect oxygen in the lungs and carry it to all the other cells in the body, from our brain to our leg muscle. Red blood cells are very, very tiny to let them squeeze ...
3.5 Reinforcement
3.5 Reinforcement

... molecule called ATP. A cell may use this energy directly or indirectly. • The sodium-potassium pump directly uses energy from the breakdown of ATP to pump two potassium ions into a cell for every three sodium ions it removes from the cell. • The proton pump indirectly uses energy from the breakdown ...
Cell Structure and Function
Cell Structure and Function

... o Vesicles bud off the trans side (side away from the ER) to exit the Golgi • Contain modified and sorted proteins or lipids • Have a “signal” that tells the cell where the product needs to be delivered ...
Biology of the Cell
Biology of the Cell

... Sometimes questions that seem simple can be devilishly difficult to answer. Imagine, for example, that you are holding a green blade of grass in your hand. The grass blade has been actively growing, its cells dividing and then stretching and elongating as the blade lengthens. Did you ever wonder how ...
Chapter 5: Cell Structure and Function
Chapter 5: Cell Structure and Function

... Robert Hooke (1660’s): Made first observation of cells (cork) • Cell = “Tiny rooms” occupied by monks Anton van Leeuwenhoek (1670’s): Early observations of protists Theodor Schwann (1830’s): Early observations of animal cells • Lack of cell wall delayed discovery (made observation difficult) Rudolf ...
lecture 8
lecture 8

... •Programmed cell death is thought to be an especially important part of animal growth and development in early life and the embryonic stage. • Examples : 1- Evidence indicates that the early development of individual fingers and toes in a human fetus is due to the apoptosis of the cells that would e ...
The Cell cp 13
The Cell cp 13

... • The surface area of the cell does not increase at the same rate as the volume. Because of this, cells typically stay small & will divide rather than getting larger. ...
how to build a
how to build a

... at least part of an artery, lobes of a lung, lobes of a liver,” says Badylak. Taylor suspects that partial approaches could aid patients with severe heart defects such as hypoplastic left heart syndrome, in which half the heart is severely underdeveloped. Restoring the other half, “essentially force ...
ImmunitySystemAP
ImmunitySystemAP

... individual ...
Cells and Systems
Cells and Systems

...  Also, blood flow through the arteries can become very limited or stop, causing a heart attack. ...
< 1 ... 680 681 682 683 684 685 686 687 688 ... 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