Cells

Cells
Notice that the larger cube has more surface area and more volume but less surface area for each cubic centimeter of volume.
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B cells are not only produced in the
b
one marrow but also mature there.
However, the precursors of T cells leave the bone marrow and mature in the
t
hymus (which accounts for their designation).
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Cells Alive! Very interesting site with new features each month.
The Nanoworld Image Gallery Lots of interesting pics and links for microscopes.
History of the Light Microscope Descriptive title says it all.
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Nerve cells projecting from the motor cortex to other parts of the brain and spinal cord. The pyramidal nerve cells play a key role in performing highly skilled movements.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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All body cells, except the reproductive cells.
explained:
Listen to a detailed explanation.
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The migration of different cell types, such as leucocytes and tumour cells, involves cellular strategies to overcome the physical resistance of three-dimensional tissue networks, ...
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Cells in culture, stained for keratin (red) and DNA (green)
The cell is the structural and functional unit of all living organisms. Some organisms, such as bacteria, are unicellular, consisting of a single cell.
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Purification of cells and their parts is achieved in the following ways: ...
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Cells derived from fetal tissue have been used to generate so-called embryonic stem cells.
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Cells contain a DNA-activated protein kinase. It is activated only by DNA containing free ends, not by intact circular DNA.
Cells also contain an ADP-ribosylase that is activated by DNA damage.
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Cells with the same genetic material are observed to behave very differently when confronted with different microenvironments.
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Cells: The basic units of life. All living organisms are a collection of cells. Chromosomes: The self-replicating genetic structures of cells.
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cells on the outer surface of the earthworm intestine
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
What Topic Is Your BIOLOGY Paper On?
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cells: the fundamental units of living things.
cellular respiration: the process by which animals and other organisms obtain the energy available in carbohydrates.
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cells
Have a basic knowledge of patterns of gene expression.
3rd Quarter, January ...
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Cells scattered among the seminiferous tubules of the vertebrate testis that secrete testosterone and other androgens, the male sex hormones.
interstitial fluid ...
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Cells regulate the activity of genes in part by increasing or decreasing their rate of transcription.
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B cells
: A major family of small lymphocytes
that are
responsible for antigen-specific humoral immunity as part of the adaptive immunity. Their antigen receptors are surface immunoglobulins (antibodies).
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sex cells
gametes. In the male it is the sperm and in the female it is the egg.
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bone cells The hard, rigid form of connective tissue constituting most of the skeleton of vertebrates; composed chiefly of calcium salts. Also called bone (osseous) tissue.
Bone os, G. osteon = bone.
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Early cells that serve as the mitotic progenitor of an organ in organogenesis.
Related Terms: Mitosis ...
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guard cells -- Pair of cells which surround a stomate and regulate its size by altering their shape.
gymnosperm -- n. A plant that produces seeds, which are not enclosed; includes any seed plant that does not produce flowers.
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glial cells- supporting cells of the nervous system, including oligodendrocytes and astrocytes in the vertebrate central nervous system and Schwann cells in the peripheralnervous system ...
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bottle cells - epithelial cells found at the initial site of gastrulation, lining the initial archenteron, that temporarily become bottle-shaped; they maintain contact with the outer surface of the embryo, ...
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Clone
Cells derived from a single cell and thus expected to be genetically identical.
Cloning
The production of multiple, genetically identical molecules of DNA, cells, or organisms.
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3 108 cells per ml
Mutation rate
10-8 mutations per gene per individual per generation ...
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Somatic cells: Any cell in the body except gametes and their precursors.
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Eukaryotic cells (or eukaryotes):
Organism whose cells have:
a distinct nucleus,
multiple chromosomes, and
a myotic cycle.
This classification includes animals, plants, and fungi.
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Live or fixed cells are labeled by fluorescent dyes. Individual cells are sorted based on their fluorescent markers. Frequently used to for purifying cells based on cell surface protein expressions, and for cell cycle studies.
Other Resources ...
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Pertaining to cells. Typically used when referring to objects or events within a cell. ...
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A class of antibiotics that kills bacterial cells. Bacteriophage (phage or phage particle). A virus that in- fects bacteria. Altered forms are used as vectors for cloning DNA. Bacteriostat.
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Amniocentesis -- prenatal diagnosis method using cells in the amniotic fluid to determine the number and kind of chromosomes of the fetus and, when indicated, perform biochemical studies. Amniocyte -- cells obtained by amniocentesis.
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peroxisome Membrane-bounded organelle in the cytoplasm of eukaryotic cells functioning in the destruction of proteins and characterized by peroxide-forming enzymes. pH The negative logarithm of the hydrogen ion concentration in an aqueous solution.
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Mitochondria - genetically independent organelles that produce energy for the cells along their many internal folds, called cristae
Mitosis - cellular division that yields two identical cells from one cell through a five-step process ...
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Selectable marker A gene which is usually constitutively expressed and allows the selection of cells which carry it through growth on a selective medium.
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Chromosome: rod-shaped bodies in the nuclei of cells that consist of a string of genes and maintain the structure or arrangement of the genetic code (DNA).
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Oncogene: A gene in a tumor virus or in cancerous cells which, when transferred into other cells, can cause transformation (note that only certain cells are susceptible to transformation by any one oncogene).
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CLONE - Describes a large number of cells, viruses, or molecules which are identical and which are derived from a single ancenstral cell, virus or molecule.
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The first broad group consists of disciplines that study the basic structures of living systems: cells, genes etc.
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Highly pleiomorphic organelle of eukaryotic cells that varies from short rod-like structures present in high number to long branched structures. Contains DNA and mitoribosomes.
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An immunoelectron-microscopy procedure in which cells are chemically fixed and infiltrated with cryoprotectant before they are frozen by being plunged into liquid nitrogen.
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Meiosis: the process of cell division in which a single cell produces four daughter cells each of which contains half of the number of chromosomes of the parent cell.
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[L. neuralis - nerve]. A group of cells found at the edges of the neural plate and lying above the neural tube after its formation. They migrate throughout the embryo to form ganglia, pigment cells, parts of gill arches, etc.
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Eukaryote. An organism whose cells possess a nucleus and other membrane-bound vesicles, including all members of the protist, fungi, plant and animal kingdoms; and excluding viruses, bacteria, and blue-green algae. See Prokaryote.
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Eukaryote organisms whose cells have a true nucleus
(eu = good well true; karyon = nut kernel nucleus)
Euryhaline having a wide range of salt concentration tolerance
(eury = broad wide; halin hali halo = salt the sea) ...
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Definition: Radial microtubule arrays in animal cells which are located around each pair of centrioles.

From Regina Bailey,
Your Guide to Biology.
FREE Newsletter. Sign Up Now! ...
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Metabolism, Metabolic: Chemical changes that occur in living cells to provide energy for vital activities and to assimilate new material.
Metamorphosis: A change in body form during development of an insect.
Microbial: A microscopic organism; a germ.
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meristem. The collection of cells at the growing point of a plant that are capable of cell division.
metamorphosis. The change in form that takes place as insects grow from immatures to adults.
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1958. Follicular dendritic cells
Number of views: 114
1959. Follicular predominantly small cleaved cell lympho ...
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Diatom. Dominant planktonic algal form with siliceous test, occurring as a single cell or as a chain of cells
Diffusion. The net movement of units of a substance from areas of higher concentration to areas of lower concentration of that substance ...
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