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30 Cards in this Set

  • Front
  • Back
basic unit of all organisms
cells
lipids w/ an attached phosphate group. plasma membranes are composed of a phospholipid bilayer with embedded proteins
phospholipid
long, tangled strands of DNA found in the eukaryotic cell nucleus during interphase
chromatin
cell process following meiosis or mitosis in wh ich the cell's cytoplasm divides and separates into new cells
cytokinesis
group of plant organelles that are used for storage of starches, lipids, or pigments
plastids
diffusion of water across a selectively permeable membrane depending on the concentration of solutes on either side of the membrane
osmosis
organelle in eukaryoti cell nucleus that produces ribosomes
nucleolus
unicellular organisms like bacteria, lacks internal membrane-bound structures
prokaryotes
regulation of internal environment of maintaining conditions for survival.
homeostasis
cell growth phase where cell increases in size, carries on metabolism, and duplicates chromosome prior to division
interphase
energy-expending process by which cells transport materials across the cell membrane against a concentration gradient
active transport
eukaryotic membrane bound organelles that transform energy stored in food molecules into ATP; has a highly folded inner membrane that produced energy-storing molecules
mitochondria
a solution in which the concentration of dissolved substances in the solution is the same as the concentration of dissolved substances inside a cell.
isotonic
non-membrane bound organelles in the nucleus, where enzymes and other proteins are assembled
ribosomes
unicellular or multicellular organisms, such as yeast, plants, and animals, composed of cells which contain a true nucleus and membrane-bound organelles
eukaryotes
active transport process where a cell engulfs material with a portion of the cell's plasma membrane and releases the contents INside of the cell
endocytosis
period of nuclear cell division in which two dauther cells are formed, each containing a complete set of chromosomes
mitosis
membrane-bound structures within eukaryotic cells
organelle
hairlike projections composed of microtubules; wavelike motion; aid in feeling and locomotion
cilia
movement of particles across cell membranes by diffusion or ossmosis; the cell uses no energy to move particles across the membrane
passive transport
clear, gelatinous fluid in eukaryotic cells that suspends the cell's organelles and is the site of numerous chemical reactions
cytoplasm
serve as boundary between the cell and its environment; allows materials such as water and nutrientsto enter and waste products to leave
plasma (cell) membrane
passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
chlorophyll-containing cell organelles found in the cells of green plants

captures light energy

converted to chemical energy in food molecules
chloroplasts
long, hairlike projections composed of microtubules

help to propel ceclls and organisms by whiplike motion
flagella
shows that plasma membrane molecules are free to move sideways within the lipid bilayer
fluid mosaic model
in eukaryotic cells

central membrane-bound organelle that manages cell function and contains DNA
nucleus
feature of the plasma membrane that maintains homeostasis within a cell by allowing some molecules in the cell while keeping others out
selective permeability
firm, fairly rigid structure located outside of the plasma membrane of plants. provides support and protection
cell wall
membrane-bound fluid filled space in the cytoplasm of plant cells used for temporary storage of materials
vacuole