Nucleoid
a region of the cytoplasm that is not enclosed in a membranous sac.
Lipid bilayer
is a continous, oily boundary that prevents the free passage of water soluble substance across it.
Wave lenght
is the distance from the peak of one wave to the peak behind it.
Electron Microscope
use magnetic lenses to bend and diffract beams of electrons.
Transmission electron microscope
electrons pass through a specimen and are used to make images of its internal details.
Scanning electron microscope
direct a beam of electrons back and forth.
Organelle
is a nucleous and another membrane.
Secretory pathway
moves new polypèptide chains from some ribosomes through ER and golgi bodies.
Endocytic Pathwaymove ions and molecules into the cytoplasm.
Vesicles
act like taxis and move substances from organelles to the next line.
Nuclear envelopeis a double-membrane system in which two lipid bilayers are pressed against each other.
Chromatinsis the cell's collection of DNA and all proteins associated with it.
Chromosome
is a double-standed DNA molecule and its associated proteins.
Peroxisomeshold enzymes that digest fatty acids, amino acids, and hydrogen peroxide.
Cell conjuctions
are molecules structures where a cell sends or receives signal or material.
Basal body
array the remains.
Pseudopodsfalse feet.
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