cell theory and cell structure (microscope (transmission electron…
cell theory and cell structure
nucleus-a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material.
plant cell-eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms.
cell membrane-the semipermeable membrane surrounding the cytoplasm of a cell.
eukaryote-an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus
animal cell-a eukaryotic cell in which all the organelles are contained in membranes.
hypotonic-having a lower osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
prokaryote-a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles. Prokaryotes include the bacteria and cyanobacteria.
hypertonic-having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
organelle-any of a number of organized or specialized structures within a living cell.
isotonic- is the concentration of two solutions is the same
A eukaryote is any organism whose cells contain a nucleus and other organelles enclosed within membranes. Eukaryotes belong to the taxon Eukarya or Eukaryota.
transmission electron microscope
a form of electron microscope in which an image is derived from electrons that have passed through the specimen, in particular one in which the whole image is formed at once rather than by scanning.
scanning electron microscope
A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that contain information about the sample's surface topography and composition.
dissecting microscope is an optical microscope variant designed for low magnification observation of a sample, typically using light reflected from the surface of an object rather than transmitted through it.
A compound microscope is a microscope which uses a lens close to the object being viewed to collect light (called the objective lens) which focuses a real image of the object inside the microscope