Cell Structure and Function

Nucleoid

Region of the cytoplasm that is not enclosed in a membrane sac.

Lipid Bilayer

Oily, boundary that prevents the free passage of water soluble substances across it.

Wavelenght

Distance from the peak of one wave to the peak behind. Electron Microscopes Magnetic lenses to lend and diffract beams of electrons.

Transmission Electron Microscopes Used to make images of internal details of electrons.

Scanning Electron Microscopes Direct a beam of electrons back and forth across the surface of an element.

Organelles Membrane bonded sacs were eukaryotic cells once started.

Secretory Pathway Series that move polypeptide cells from ribosomes through ER and golgi bodies and release from the cell.

Endocytic Pathway Moves ions and molecules into the cytoplasm.

Vesicles Tiny molecules that move organelles' substances to another organelle in line.

Nuclear Envelope Double membrane system in which 2 lipid bilayers are pressed against each other.

Chromosome Double stranded DNA associated to proteins in a condensed form.

Chromatin Cell's connection of DNA and all proteins.

Peroxisomes Hold enzymes that digest different acids.

Cells junctions Molecular structures where a cell sends or receives signals and materials.

Basal Body Microtubules fixed into a 9+12 array.