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Description
Flashcards by Mellie Montoya, updated more than 1 year ago
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Created by Mellie Montoya
over 9 years ago
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| Question | Answer |
| histology | microscopic study of cells, tissues, and organs |
| epithelium | cells are in close contact with each other; line body surfaces (ex. epidermis of skin, linings of vessels, hollow organs, and body cavities); composed of single or stratified layer of densely packed cells; also form glands that perform specialized, secretory functions; avascular |
| connective tissue | cells that are separated by an intercellular matrix typically consisting of fibers embedded in a ground substance; classified as loose or dense; ex. cartilage, bone, fat, and blood |
| muscle | a soft tissue found in most animals; muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. |
| nerve | main component of the two parts of the nervous system; It is composed of neurons, or nerve cells, which receive and transmit impulses, and neuroglia, also known as glial cells or more commonly as just glia, which assist the propagation of the nerve impulse as well as providing nutrients to the neuron. |
| smears | specimen consists of cells suspended in a fluid (e.g. blood, semen, cerebrospinal fluid, or a culture of microorganisms), or where individual cells have been scraped brushed or aspirated (sucked) from a surface or from within an organ; spread thinly |
| whole mounts | an entire organism or structure is small enough or thin enough to be placed directly onto a microscope slide (e.g. a small unicellular or multicellular organism or a membrane that can be stretched thinly on to a slide) |
| sections | specimens are supported in some way so that very thin slices can be cut from them, mounted on slides, and stained. Sections are prepared using an instrument called a “microtome”. |
| hematoxilyn | basic dye that stains acid (ex. DNA, RNA) |
| eosin | acidic dye that stains basic structures (ex. most proteins) |
| h&e | counterstain mix of hematoxilyn and eosin; most commonly used stain |
| trichrome stain | a general name for a number of techniques for the selective demonstration of muscle, collagen fibers, fibrin and erythrocytes; muscle is reddish brown; connective tissue is bluish green |
| periodic acid-Schiff (PAS) | stains complex carbohydrates (ex. mucus, glycogen, basal lamina) |
| basal surface | pertaining to or situated near a base; in physiology, pertaining to the lowest possible level; where epithelial tissues are anchored to the basement membrane that separates them from the underlying connective tissue compartment |
| lateral surface | he face or surface of the sides of the epithelial cells; where junctional complexes are that allow epithelial tissues to function in a cohesive manner/be connected to each other |
| apical surface | the surface of the plasma membrane that faces inward to the lumen. This is particularly evident in epithelial and endothelial cells, but also describes other polarized cells, such as neurons; location of extensions with specialized functions (ex. cilia, microvilli) |
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