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Biology Exam 2
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Lyosomes
release enzymes to digest molecules outside a cell
Smooth Endoplasmic Reticulum
removes toxins
Golgi Bodies
extension of the membranes of the endoplasmic reticulum
Mitochondria
where ATP is formed
Ribosomes
where proteins are formed
Centrioles
barrel shaped organelles in animal cells
Cilia
small hair like structures
Chloroplasts
where photosynthesis occurs in plants
Membrane pumps
some proteins in the phospholipid layer of a cell membrane
Hypotonic
distilled water
Isotonic
physiological saline
Solute
What NaCl is called when dissolved in water
Nucleolus
contains RNA and protein
Diffusion
move from an area of more concentration to less
Chromatin
DNA and its associated proteins together
Selectively permeable
membranes control what passes into or out of cells
Cell membranes
2 layers of phospolipids
Ultracentrifuge
pulls heavier parts of cells away from others
Prokaryotes
do not have nuclear membranes
Eukaryotes
have nuclear membranes
Hans Spemann
found that the nucleus determines what organism looks like
Schleiden and Schwann
proposed the cell law
Dutrochet
saw that plant tissues had cells
Robert Hooke
named after holes in cork
Virchow
demonstrated that cells come from other cells