Chapter 3: Terms, Acrynyms And Abreviations Flashcards
Atom
Smallest, most basic chemical unit of an element
Proton
Positively charged particle
Neutron
Particle with no charge
Molecule
Chemical compound of two or more atoms
Major parts of a cell
Cell membrane, cytoplasm, and nucleus
Cell membrane
Outer covering of the cell
Cytoplasm
Substance between the cell membrane and the nuclear membrane
Nucleus
Responsible for cell’s metabolism, growth, and reproduction; contains the chromosomes
Stem cells
Precursors of all body cells; has three general properties: dividing and renewing, unspecialized, and can give rise to specialize cell types
Tissue
Grouping of similar cells that perform specialize functions
Four basic tissue
Epithelial, connective, muscle, and nerve
Nervous tissue
Internal communication and control; brain, spinal cord, and nerves
Muscle tissue
Contracts to cause motion; muscle attached to the bone (skeletal), muscles of heart wall (cardiac), muscles of walls of hollow organs (smooth)
Epithelial tissue
Forms boundaries between different environments; protects, sensations, secretes, absorbs, excretes, and filters; lining of the GI tract and other hollow organs, skin surface (epidermis)
Connective tissue
Supports, protects, and binds other tissues; cartilage, bones, tendons, fat, and other soft padding tissue
Organs
Multiple different tissues serving a common purpose or function make up structures