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lipid bilayer
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structure of membrane, two sheets of lipid molcules with tails pointed inward, proteins embedded in bilayer (serve as channels) along with carbohydrate molecules (id markers - recognition)
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terms list
lipid bilayer
structure of membrane, two sheets of lipid molcules with tails pointed inward, proteins embedded in bilayer (serve as channels) along with carbohydrate molecules (id markers - recognition)
hypertonic
having a higher concentration of solute than another solution
hypotonic
when comparing two solutions, the solution with the lesser concentration of solutes
isotonic
used of solutions) having the same or equal osmotic pressure
passive transport
The movement of materials through a cell membrane without using energy
diffusion
process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated
osmosis
diffusion of water through a selectively permeable membrane
selectively permeable
a property of cell membranes that allows some substances to pass through, while others cannot
faciliated diffusion
The passive transport of ions or molecules by a specific carrier protein in a membrane
concentration gradient
a difference in the concentration of a substance across a space
active transport
energy-requiring process that moves material across a cell membrane against a concentration difference;the movement of materials through a cell membrane using energy
endocytosis
process by which a cell takes material into the cell by infolding of the cell membrane; is an
exocytosis
process by which a cell releases large amounts of material
Mitosis
cell division in which the nucleus divides into nuclei containing the same number of chromosomes
meiosis
(genetics) cell division that produces reproductive cells in sexually reproducing organisms
haploid
term used to refer to a cell that contains only a single set of chromosomes and therefore only a single set of genes
diploid
cells having two sets of chromosomes
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