Cell Membrane Quiz Flashcards

Terms Definitions
isotonic
equal concentration
monosaccharides
simple sugars; glucose
organic compounds
compounds containing carbon
unsaturated carbons have
double bonds
eukaryotes
10-100 micrometers; everything else: protists, fungi, plants, animals
disaccharides
double sugars; formed through dehydration synthesis; sucrose
lipids rotate
fast and tails flexible
non-polar
containing no permanently dipolar molecules; lacking a dipole.
cotransport
active transport that is coupled transport of 2 substances; cotransporters-membrane proteins
selectively permeable; allows passage of some molecules but not others
plasma membrane
macromolecule
large molecule made up simple structures
saclike structures used for storing materials, animal cells store proteins, fats, and carbohydrates, plant cells contain a large central vacuole that stores water and dissolved salts, as well as providing support
vacuoles
urea
a compound, CO(NH2)2, occurring in urine and other body fluids as a product of protein metabolism.
Facilitated Diffusion
using ion channels and protein carriers to move across the membrane
pump
active trasport that uses energy from ATP; ATP supplies energy to move molecule across membrane; Na+ or K+ pump; proton pump; energy from a concentration difference across a membrane
nucleus
has a membrane; set of genetic instructions
DNA
double helix; has the directions to make protein
cholesterol prevents
freezing of hydrocarbon chains (arctic bird legs). It flip-flops quickly, maintains stability of bilayer, strengthen bilayer
the fatty acid tails are non-polar meaning they are repelled by water
hydrophobic
osmosis
the tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.
channel mediated
ions or small molecules pass through channel proteins without regulation or help
glycolipids are found
on the surface of all PMs
functions in processing and transporting proteins and other macromolecules
Endoplasmic Reticulem (ER)
cholesterol
a sterol, C27H46O, that occurs in all animal tissues, esp. in the brain, spinal cord, and adipose tissue, functioning chiefly as a protective agent in the skin and myelin sheaths of nerve cells, a detoxifier in the bloodstream, and as a precursor of many
lipid
any of a group of organic compounds that are greasy to the touch, insoluble in water, and soluble in alcohol and ether: lipids comprise the fats and other esters with analogous properties and constitute, with proteins and carbohydrates, the chief structur
phospholipid
a lipid made of a phosphate group and two fatty acids
the fluidity of a bilayer depends on
composition and temperature
moderately thick and mainly anchor organelles and enzymes to certain parts of the cell
Components of Cytoskeleton: Intermediate Fibers
passive transport; active transport
2 types of movement across a selectively permeable membrane
the function of the lipid bilayer
cell communication, import/export of molecules, cell growth and motility
receptor
an end organ or a group of end organs of sensory or afferent neurons, specialized to be sensitive to stimulating agents, as touch or heat.
plant lectins bind surface carbohydrate
Con A, soybean lectin, wheat germ lectin, lotus seed lectin.
- Cells are made up of biomolecules - biomolecules are built from smaller, simpler units
Parts of the Cell (2nd)
/ 33
Term:
Definition:
Definition:

Leave a Comment ({[ getComments().length ]})

Comments ({[ getComments().length ]})

{[comment.username]}

{[ comment.comment ]}

View All {[ getComments().length ]} Comments
Ask a homework question - tutors are online